JP7617513B2 - Vibration control structure system - Google Patents

Description

Patent Act Article 30, Paragraph 2 applies. Publication name: 2020 Annual Convention (Kanto) Academic Lecture Abstracts and Architectural Design Presentation Abstracts, pp. 321-322 Publisher: Architectural Institute of Japan Publication date: July 20, 2020 Publication name: 2020 Annual Convention (Kanto) Academic Lecture Abstracts and Architectural Design Presentation Abstracts, pp. 363-364 Publisher: Architectural Institute of Japan Publication date: July 20, 2020 Publication name: 2020 Annual Convention (Kanto) Academic Lecture Abstracts and Architectural Design Presentation Abstracts, pp. 365-366 Publisher: Architectural Institute of Japan Publication date: July 20, 2020 Publication name: 2020 Annual Convention (Kanto) Academic Lecture Abstracts and Architectural Design Presentation Abstracts, pp. 367-368 Publisher: Architectural Institute of Japan Publication date: July 20, 2020 Publication name: 2020 Annual Convention (Kanto) Collection of Abstracts of Academic Lectures and Architectural Design Presentations, pp. 369-370 Publisher: Architectural Institute of Japan Publication date: July 20, 2020 Publication name: 2020 Annual Convention (Kanto) Collection of Abstracts of Academic Lectures and Architectural Design Presentations, pp. 371-372 Publisher: Architectural Institute of Japan Publication date: July 20, 2020 Meeting name: Online seminar "Structural Tech - Web Session 2020" Organizer: NTT Facilities Research Institute, Inc. Date held: February 5, 2021 Meeting name: Online seminar "Structural Tech - Web Session 2020" Organizer: NTT Facilities Research Institute, Inc. Date held: March 5, 2021 Publication name: Structure No. 158, page 91 Publisher: Japan Structural Engineers Association Publication date: April 20, 2021

The present invention relates to a vibration control structure system.

Conventionally, frame structures (vibration-damping structural systems) such as those disclosed in Patent Document 1 have been used to improve the earthquake resistance and vibration-damping properties of wooden buildings. The frame structure in Patent Document 1 comprises a wooden rectangular frame and a buckling restraint brace joined to the rectangular frame, and is configured so that the buckling restraint brace damps the vibration energy generated in the rectangular frame.

JP 2017-145654 A

In the frame structure of Patent Document 1, the connection plate attached to the buckling restraint brace is joined to the rectangular frame by wood screws. However, wood screws cannot adequately resist the tensile force generated between the connection plate and the rectangular frame, so the frame structure of Patent Document 1 cannot obtain sufficient vibration control performance. For example, it is possible to use bolts with high tensile resistance instead of wood screws to join the connection plate to the rectangular frame. However, when using bolts, it is necessary to provide through holes in the rectangular frame for the bolts to pass through. In this case, a clearance is created between the peripheral wall of the through hole and the bolt, which creates a sliding area for the clearance against the shear force generated between the connection plate and the rectangular frame, and so sufficient vibration control performance cannot be obtained.

The present invention was developed in consideration of the above problems, and aims to provide a vibration-damping structure system with superior vibration-damping performance.

The vibration-damping structure system of the present invention is a vibration-damping structure system comprising a frame having wooden vertical members and horizontal members, a vibration-damping device joined to the frame, and a joining structure for joining the vibration-damping device to the frame, the joining structure being provided on both ends of the vibration-damping device and including joining plates joined to each of the vertical members and horizontal members, washer plates arranged to sandwich each of the vertical members and horizontal members together with the joining plates, and a surface of each of the vertical members and horizontal members to which the joining plates are joined. and a sliding suppression plate that is fixed to abut against the side of the joining plate along the extension direction of the vertical members and the horizontal members, the joining plate is joined to the vertical members and the horizontal members by bolts that pass through the joining plate, the vertical members and the horizontal members, and the washer plate, and the sliding suppression plate is fixed to the vertical members and the horizontal members by screws that pass through the sliding suppression plate and are screwed into the vertical members and the horizontal members.

It is also preferable that the sliding suppression plate is arranged to sandwich the joining plate from both sides in the direction in which the vertical members and the horizontal members extend.

In addition, the vertical members include a first vertical member and a second vertical member, the horizontal members include an upper horizontal member and a lower horizontal member, the vibration damping device includes a first vibration damping device and a second vibration damping device, one end of the first vibration damping device is joined to the first vertical member via a first joining plate, the other end of the first vibration damping device is joined to the upper horizontal member and the second vertical member via a first joining member, one end of the second vibration damping device is joined to the first vertical member via a second joining plate, and the other end of the second vibration damping device is joined to the lower horizontal member and the second vertical member via a second joining member, the first joining plate and the second joining plate are arranged to abut against each other in the extension direction of the first vertical member, and the first joining plate and the second joining plate are sandwiched from both sides in the extension direction of the first vertical member. The sliding suppression plate is arranged so that the first joining member is integrally formed with a third joining plate joined to the upper horizontal member and a fourth joining plate joined to the second vertical member, the sliding suppression plate is arranged so that the third joining plate abuts against the side of the third joining plate opposite the second vertical member, the sliding suppression plate is arranged so that the fourth joining plate abuts against the side of the fourth joining plate opposite the upper horizontal member, the second joining member is integrally formed with a fifth joining plate joined to the lower horizontal member and a sixth joining plate joined to the second vertical member, the sliding suppression plate is arranged so that the fifth joining plate abuts against the side of the fifth joining plate opposite the second vertical member, and the sliding suppression plate is arranged so that the sixth joining plate abuts against the side of the sixth joining plate opposite the lower horizontal member.

It is also preferable that the joining plate and the washer plate have widths approximately equal to those of the vertical members and the horizontal members, respectively, and that the installation area of the washer plate is approximately equal to or greater than the installation area of the joining plate.

It is also preferable that one of the vertical members and the horizontal members has a convex portion and the other of the vertical members and the horizontal members has a concave portion, the vertical members and the horizontal members are fixed to each other by fitting the convex portion into the concave portion, and a screw is screwed in so as to extend along the direction in which one of the vertical members and the horizontal members extends, adjacent to the concave portion of the other of the vertical members and the horizontal members in the direction in which the other of the vertical members and the horizontal members extends.

It is also preferable that the strength of the joint structure is at least 1.3 times the strength of the vibration damping device.

It is also preferable that the vibration control device comprises a core material that extends along the extension direction and has weak axis and strong axis directions that are substantially perpendicular to the extension direction, and a wooden restraining member for restraining buckling of the core material in the weak axis and strong axis directions, and that the restraining member comprises a pair of weak axis restraining members provided on both sides of the core material in the weak axis direction so as to press and clamp the core material in the weak axis direction, and a pair of strong axis restraining members provided on both sides of the core material in the strong axis direction so as to press and clamp the core material in the strong axis direction.

It is also preferable that the vibration damping device includes a pair of side plates fixed to both sides of the weak axis restraint material in the strong axis direction, and the pair of side plates are fixed to the pair of weak axis restraint materials so as to compress the pair of strong axis restraint materials in the strong axis direction between the pair of side plates and the core material.

Furthermore, it is preferable that the pair of weak axis restraint members are arranged on both sides of the weak axis direction of both the core material and the pair of strong axis restraint members, and the pair of strong axis restraint members are formed to a size such that the sum of the lengths of the core material and the pair of strong axis restraint members in the strong axis direction is longer than the length of the weak axis restraint member in the strong axis direction before the pair of side plates are fixed to the pair of weak axis restraint members.

It is also preferable that a self-adhesive is provided between the core material and the weak axis restraint material in the approximate center of the extension direction of the core material, which adheres the core material and the weak axis restraint material to each other, and that an unbond material is provided between the core material and the weak axis restraint material and the strong axis restraint material in both sides of the approximate center of the extension direction of the core material, which reduces the frictional force generated between the core material and the weak axis restraint material and the strong axis restraint material.

The present invention provides a vibration-damping structure system with superior vibration-damping performance.

1 is a front view of a vibration-damping structure system according to one embodiment of the present invention. FIG. 2 is a partial enlarged view of region II in FIG. 1 . 3 is a cross-sectional view taken along line III-III in FIG. 2. FIG. 4 is a front view of a vibration-damping structure system according to another embodiment of the present invention. 5 is a cross-sectional view taken along line VV in FIG. 4. FIG. 5 is an exploded perspective view of a vibration-damping device that can be used in the vibration-damping frame system of FIGS. 1 and 4 . FIG. 5 is a front view of a vibration-damping device that can be used in the vibration-damping frame system of FIGS. 1 and 4, with the self-adhesive and unbonding material omitted. FIG. 8 is a side view of the vibration damping device of FIG. 7, in which the self-adhesive and the unbonding material are omitted. FIG. 9 is a cross-sectional end view taken along line IX-IX of FIG. 7. 8 is a cross-sectional end view taken along line XX in FIG. 7. 10 is a cross-sectional view taken along line XI-XI of FIG. 7. FIG. 11 is a diagram showing a state before the side plate in FIG. 10 is fixed.

Below, we will explain the vibration-damping structure system according to several embodiments of the present invention with reference to the attached drawings. However, the embodiments shown below are merely examples, and the vibration-damping structure system of the present invention is not limited to the following examples.

Figures 1 to 3 show the vibration-damping structure system VS according to the first embodiment, and Figures 4 and 5 show the vibration-damping structure system VS according to the second embodiment. The vibration-damping structure system VS according to the first embodiment has a vibration-damping device arrangement called a "knee-brace type," which is advantageous in that a large opening can be secured within the structural frame F. The vibration-damping structure system VS according to the second embodiment has a vibration-damping device arrangement called a "K type," which is advantageous in that vibration-damping performance can be obtained against relatively large vibration energy. Below, the configurations common to both embodiments will be explained together, while adding configurations that differ between the two embodiments as appropriate. In the following explanation, when "this embodiment" is mentioned, it refers to both embodiments.

The vibration-damping structure system VS of this embodiment is incorporated into a wooden building for use mainly to improve the earthquake resistance and vibration control of the wooden building. As shown in Figs. 1 and 4, the vibration-damping structure system VS includes a frame F having wooden vertical members RP, LP and horizontal members UB, LB, a vibration-damping device 1 joined to the frame F, and a joint structure J for joining the vibration-damping device 1 to the frame F. The vibration-damping structure system VS improves the earthquake resistance and vibration control of the wooden building by absorbing vibration energy generated in the frame F due to disturbances such as earthquake motion and wind with the vibration-damping device 1 and/or by resisting external forces received from the frame F with the vibration-damping device 1 to improve the strength of the frame F or suppress deformation of the frame F.

The structural frame F is a structure that includes wooden vertical members RP, LP and horizontal members UB, LB, and constitutes a part of a wooden building. As shown in FIG. 1 and FIG. 4, the vertical members RP, LP are arranged to extend in a first direction X1 (approximately vertical in the illustrated example), and are members that support the load of the upper part of the wooden building. In this embodiment, the vertical members RP, LP include first and second vertical members (e.g., columns) RP, LP that extend along the first direction X1, and are each formed into an approximately rectangular column shape extending in the first direction X1. The horizontal members UB, LB are bridged between the first and second vertical members RP, LP along a second direction X2 (approximately horizontal in the illustrated example) that is approximately perpendicular to the first direction X1, and are members that support the load of the upper part of the wooden building and transmit the load of the upper part of the wooden building to the vertical members RP, LP. In this embodiment, the cross members UB and LB include an upper cross member (e.g., a beam) UB and a lower cross member (e.g., a beam or a base) LB that extend along the second direction X2, and each is formed into a substantially rectangular column shape extending in the second direction X2.

The vertical members RP, LP and the horizontal members UB, LB are fixed to each other to form a structural frame F having a space inside. The vertical members RP, LP and the horizontal members UB, LB only need to be fixed to each other, and there is no particular limitation on the method of fixing them to each other. The vertical members RP, LP and the horizontal members UB, LB can be fixed to each other by a so-called "mortise and tenon joint", for example, as shown in Figures 1, 2 and 4. More specifically, one of the vertical members RP, LP and the horizontal members UB, LB has a convex portion, and the other of the vertical members RP, LP and the horizontal members UB, LB has a concave portion, and the vertical members RP, LP and the horizontal members UB, LB are fixed to each other by fitting the convex portion and the concave portion together. In this way, the vertical members RP, LP and the horizontal members UB, LB are fixed to each other with "mortise and tenon joints," which prevents clearance from occurring between the vertical members RP, LP and the horizontal members UB, LB, and prevents rattling between the vertical members RP, LP and the horizontal members UB, LB. This reduces loss in the transmission of vibration energy from the structural frame F to the vibration control device 1, and allows vibration energy to be transmitted to the vibration control device 1 more accurately.

In the first embodiment, as shown in Figures 1 and 2, the cross members UB and LB have convex portions UB1 and LB1 at the ends in the second direction X2, and the convex portions UB1 and LB1 of the cross members UB and LB engage with the concave portions RP1 and LP1 provided in the vertical members RP and LP, thereby fixing the vertical members RP and LP and the cross members UB and LB to each other. In this embodiment, as shown in Figures 2 and 3, a screw BS1 (e.g., a coarse thread screw) is screwed in so as to extend along the direction in which the cross member UB extends (second direction X2) adjacent to the concave portion LP1 of the vertical member LP in the direction in which the vertical member LP extends (first direction X1). In the illustrated example, multiple screws BS1 are arranged side by side on both sides of the concave portion LP1 along the direction in which the vertical member LP extends. In the first embodiment, not only the connection between the second vertical member LP and the upper horizontal member UB shown in Fig. 2 and Fig. 3, but also other connection parts have the same structure. When the frame F vibrates due to disturbances such as earthquake motion or wind, a shear force is applied from the convex parts UB1, LB1 of the horizontal members UB, LB to the concave parts RP1, LP1 of the vertical members RP, LP in the first direction X1. However, by screwing the screws adjacent to the concave parts RP1, LP1 in the first direction X1, the strength of the vertical members RP, LP in the vicinity of the concave parts RP1, LP1 is increased, and cracking of the vertical members RP, LP in the vicinity of the concave parts RP1, LP1 can be suppressed. This suppresses damage to the frame F, and therefore suppresses the loss of transmission of vibration energy from the frame F to the vibration damping device 1, and allows vibration energy to be transmitted to the vibration damping device 1 more accurately. In this embodiment, the vertical members RP, LP and the horizontal members UB, LB may be fixed to each other by bolts and nuts that extend from the inside of the horizontal members UB, LB along the second direction X2 through the convex portions UB1, LB1 of the horizontal members UB, LB and the concave portions RP1, LP1 of the vertical members RP, LP, penetrating the vertical members RP, LP. This makes it possible to resist tensile forces that tend to pull the vertical members RP, LP and the horizontal members UB, LB apart from each other.

In the second embodiment, as shown in Fig. 4, the vertical members RP and LP have convex portions RP2 and LP2 at the ends in the first direction X1, and the vertical members RP and LP are fixed to each other by fitting the convex portions RP2 and LP2 of the vertical members RP and LP into the concave portions UB2 and LB2 of the cross members UB and LB. In this embodiment, the convex portions RP2 and LP2 of the vertical members RP and LP and the concave portions UB2 and LB2 of the cross members UB and LB are fixed to each other by screws BS2 (e.g., coarse thread screws) extending along a third direction X3 that is substantially perpendicular to the extension direction (first direction X1) of the vertical members RP and LP and the extension direction (second direction X2) of the cross members UB and LB. By fixing the convex parts RP2, LP2 of the vertical members RP, LP and the concave parts UB2, LB2 of the horizontal members UB, LB to each other with screws, it is possible to suppress the occurrence of rattle between the vertical members RP, LP and the horizontal members UB, LB when the structural frame F vibrates due to external disturbances such as earthquake motion or wind. This suppresses the loss of vibration energy transmission from the structural frame F to the vibration control device 1, and allows vibration energy to be transmitted to the vibration control device 1 more accurately.

In the first embodiment, a screw is provided adjacent to the recess, and in the second embodiment, a screw is provided to fix the protrusion and recess. However, in the first embodiment, a screw may be provided to fix the protrusion and recess, and in the second embodiment, a screw may be provided adjacent to the recess.

The vibration control device 1 is a device that is joined to the frame F, more specifically, the vertical members RP, LP and the horizontal members UB, LB of the frame F, and absorbs vibration energy generated in the frame F and/or resists external forces received from the frame F. The vibration control device 1 is not particularly limited in its arrangement as long as at least both ends are joined to the vertical members RP, LP and the horizontal members UB, LB of the frame F. In this embodiment, as shown in Figures 1 and 4, the vibration control device 1 extends along the extension direction L, and both ends in the extension direction L are joined to the vertical members RP, LP and the horizontal members UB, LB of the frame F. The vibration control device 1 receives forces along the extension direction L from both ends in the extension direction L, and absorbs vibration energy generated in the frame F and/or resists external forces received from the frame F.

In the first embodiment shown in FIG. 1, the vibration control device 1 is arranged in a manner called a "knee brace type", with two vibration control devices 1, 1 being arranged so as to span between the upper cross member UB and each of the first and second vertical members RP, LP. In the second embodiment shown in FIG. 4, the vibration control device 1 is arranged in a manner called a "K type", with two vibration control devices 1, 1 being arranged so as to span between the first vertical member RP and the upper cross member UB and the second vertical member LP, and between the first vertical member RP and the lower cross member LB and the second vertical member LP.

The vibration control device 1 is not particularly limited in its configuration, as long as it can absorb at least a portion of the vibration energy generated in the structural frame F and/or resist an external force of a predetermined magnitude or less received from the structural frame F. In the vibration control structural system VS of this embodiment, the buckling-constrained structural material shown in Figures 6 to 12 is used as the vibration control device 1. Details of the vibration control device (buckling-constrained structural material) 1 will be described in detail below. Note that, in addition to the buckling-constrained structural materials exemplified below, the vibration control device 1 can also be any other vibration control device such as a well-known steel damper, lead damper, viscoelastic damper, or oil damper.

The joint structure J is a structure that joins the vibration control device 1 to the vertical members RP, LP and horizontal members UB, LB of the structural frame F. The joint structure J is designed to have a joint strength that is sufficient to prevent the connection from coming undone before the vibration control device 1 is deformed. The strength of the joint structure J is preferably 1.3 times or more the strength of the vibration control device 1. As shown in Figures 1 and 4, the joint structure J is provided on both ends of the vibration control device 1, and joins at least one end of the vibration control device 1 to either the vertical members RP, LP or the horizontal members UB, LB, and joins the other end of the vibration control device 1 to the other of the vertical members RP, LP and the horizontal members UB, LB.

For example, in the first embodiment shown in FIG. 1, one end of one vibration damping device 1 (right side in the figure) on one side in the extension direction L (lower side in the figure) is joined to a first vertical member RP via a joint structure J, and one end of one vibration damping device 1 on the other side in the extension direction L (upper side in the figure) is joined to an upper horizontal member UB via a joint structure J. Also, one end of one side in the extension direction L of the other vibration damping device 1 (left side in the figure) is joined to a second vertical member LP via a joint structure J, and one end of the other side in the extension direction L of the other vibration damping device 1 (upper side in the figure) is joined to an upper horizontal member UB via a joint structure J.

In the second embodiment shown in FIG. 4, one end (lower side in the figure) of one vibration damping device 1 (first vibration damping device) in the extension direction L is joined to the first vertical member RP via a joining plate J1 (first joining plate) of the joining structure J described later, and the other end (upper side in the figure) of one vibration damping device 1 in the extension direction L is joined to the upper horizontal member UB and the second vertical member LP via the joining members (first joining members) of the two joining structures J and J. The first joining member is formed integrally with the joining plate J1 (third joining plate) joined to the upper horizontal member UB and the joining plate J1 (fourth joining plate) joined to the second vertical member LP. In addition, the end of the other (lower in the figure) vibration damping device 1 (second vibration damping device) on one side (upper in the figure) in the extension direction L is joined to the first vertical member RP via the joining plate J1 (second joining plate) of the joining structure J, and the end of the other (lower in the figure) in the extension direction L of the other vibration damping device 1 is joined to the lower horizontal member LB and the second vertical member LP via the joining members (second joining members) of the two joining structures J, J. The second joining member is formed integrally with the joining plate J1 (fifth joining plate) joined to the lower horizontal member LB and the joining plate J1 (sixth joining plate) joined to the second vertical member LP.

As shown in Figures 2 and 4, the joint structure J is provided at both ends of the vibration damping device 1 and includes a joint plate J1 that is joined to each of the vertical members RP, LP and the horizontal members UB, LB, a washer plate J2 that is arranged to clamp each of the vertical members RP, LP and the horizontal members UB, LB together with the joint plate J1, and a sliding suppression plate J3 that is fixed so as to abut against the side of the joint plate J1.

The joint plate J1 is provided at both ends of the vibration damping device 1 and is joined to each of the vertical members RP, LP and the horizontal members UB, LB, thereby joining both ends of the vibration damping device 1 to the vertical members RP, LP and the horizontal members UB, LB. In this embodiment, as shown in Figures 2 to 5, the joint plate J1 is formed in a plate shape that extends in the direction in which the vertical members RP, LP or the horizontal members UB, LB extend (first or second direction X1, X2) and in the width direction (third direction X3) that is approximately perpendicular to the first and second directions X1, X2, corresponding to the vertical members RP, LP or the horizontal members UB, LB to be joined. One surface of the joint plate J1 is arranged to face the inner side surface of each of the frame frames F of the vertical members RP, LP and the horizontal members UB, LB, and the other surface of the joint plate J1 is connected to the end of the vibration damping device 1. In this embodiment, the joining plate J1 is fixed to the end of the core material 2 of the vibration damping device 1 in the extension direction L (described later) by a known fixing method such as welding.

As shown in Figures 2 to 5, the joining plate J1 is joined to each of the vertical members RP, LP and horizontal members UB, LB by bolts BT and nuts NT that pass through the joining plate J1, the vertical members RP, LP and horizontal members UB, LB, and washer plate J2. As a result, the joining plate J1 is pressed toward the vertical members RP, LP and horizontal members UB, LB and joined to them. When the structural frame F is subjected to external disturbances such as earthquake motion or wind, tensile forces that try to pull the joining plate J1 and the vertical members RP, LP and horizontal members UB, LB apart are generated. The joining plate J1 is pressed toward the vertical members RP, LP and the horizontal members UB, LB to join them, thereby resisting the tensile force and suppressing the relative movement of the joining plate J1 in the tensile direction with respect to the vertical members RP, LP and the horizontal members UB, LB. This suppresses the loss of vibration energy transmission from the structural frame F to the vibration control device 1, and allows vibration energy to be transmitted to the vibration control device 1 more accurately.

The arrangement of the joint plate J1 is not particularly limited and can be set appropriately according to the arrangement of the vibration damping device 1. For example, in the first embodiment, as shown in Fig. 1 and Fig. 2, for one vibration damping device 1 (right side in Fig. 1), the joint plates J1, J1 on both sides are provided near the joint portion between the first vertical member RP and the upper horizontal member UB of each of the first vertical member RP and the upper horizontal member UB, and spaced apart from the joint portion between the first vertical member RP and the upper horizontal member UB. For the other vibration damping device 1 (left side in Fig. 1), the joint plates J1, J1 on both sides are provided near the joint portion between the second vertical member LP and the upper horizontal member UB of each of the second vertical member LP and the upper horizontal member UB, and spaced apart from the joint portion between the second vertical member LP and the upper horizontal member UB. In the second embodiment, as shown in FIG. 4, for one (upper in the figure) vibration damping device 1 (first vibration damping device), one joining plate J1 (first joining plate) is provided adjacent to approximately the center in the first direction X1 of the first vertical member RP and above the center, and two joining plates J1, J1 (third and fourth joining plates) connected to each other are provided adjacent to the joint portions between the upper horizontal member UB and the second vertical member LP of both the upper horizontal member UB and the second vertical member LP. Also, for the other (lower in the figure) vibration damping device 1 (second vibration damping device), one joint plate J1 (second joint plate) is provided adjacent to the approximate center of the first vertical member RP in the first direction X1 and below the approximate center, and two joint plates J1, J1 (fifth and sixth joint plates) connected to each other are provided adjacent to the joint portion between the lower horizontal member LB and the second vertical member LP of both the lower horizontal member LB and the second vertical member LP. In the second embodiment, the two joint plates J1, J1 (first and second joint plates) provided on the first vertical member RP are arranged to abut each other directly or indirectly via other members in the direction in which the first vertical member RP extends (first direction X1). As a result, the two joint plates J1, J1 (first and second joint plates) are suppressed from moving relative to each other in the direction approaching each other along the first direction X1. In addition, the two joining plates J1, J1 (third and fourth joining plates) joined to both the upper horizontal member UB and the second vertical member LP are connected to each other, thereby suppressing relative movement in the first and second directions X1, X2 with respect to the second vertical member LP and the upper horizontal member UB. In addition, the two joining plates J1, J1 (fifth and sixth joining plates) joined to both the lower horizontal member LB and the second vertical member LP are connected to each other, thereby suppressing relative movement in the first and second directions X1, X2 with respect to the second vertical member LP and the lower horizontal member LB.

The joining plate J1 is not particularly limited in size, but only needs to be larger than the head of the bolt BT and the nut NT to prevent the head of the bolt BT and the nut NT from directly contacting the vertical members RP, LP and the horizontal members UB, LB. In this embodiment, the joining plate J1 has a width (length in the third direction X3) that is approximately equal to each of the vertical members RP, LP and the horizontal members UB, LB, as shown in Figures 3 and 5. As a result, when the bolt BT and the nut NT are tightened together, the force with which the joining plate J1 presses the vertical members RP, LP and the horizontal members UB, LB is distributed over the entire width of each of the vertical members RP, LP and the horizontal members UB, LB, so that the joining plate J1 can be prevented from penetrating into each of the vertical members RP, LP and the horizontal members UB, LB.

As shown in Figures 2 to 5, the joining plate J1 may be provided with a rib plate J4 that stands in a direction intersecting the joining plate J1 (approximately vertical in the illustrated example). Providing the rib plate J4 on the joining plate J1 increases the bending strength of the joining plate J1. This suppresses deformation of the joining plate J1, suppresses loss in the transmission of vibration energy from the structural frame F to the vibration control device 1, and allows for more accurate transmission of vibration energy.

The joining plate J1 only needs to have a strength sufficient to prevent deformation before the vibration control device 1 deforms when the structural frame F is subjected to external disturbances such as earthquake motion or wind, and there are no particular limitations on the material from which it is made. The joining plate J1 can be made of, for example, steel.

Washer plate J2 is a member fixed to each of the vertical members RP, LP and the horizontal members UB, LB so as to sandwich each of the vertical members RP, LP and the horizontal members UB, LB between joining plate J1 and washer plate J2. Washer plate J2 prevents damage to each of the vertical members RP, LP and the horizontal members UB, LB (bolt heads or nuts sinking in) due to bolt joining when joining plate J1 to each of the vertical members RP, LP and the horizontal members UB, LB. In this embodiment, as shown in Figures 2 to 5, the washer plate J2 is formed in a plate shape that extends in the direction in which the vertical members RP, LP or the horizontal members UB, LB extend (first or second direction X1, X2) and in the width direction (third direction X3) that is approximately perpendicular to the first and second directions X1, X2, in accordance with the vertical members RP, LP or the horizontal members UB, LB to be provided. The washer plate J2 is disposed in a position facing the joining plate J1 on the side of each of the vertical members RP, LP and the horizontal members UB, LB that is on the outside of the structural frame F.

The washer plate J2 is not particularly limited in size, but it is sufficient that it is formed at least larger than the head of the bolt BT and the nut NT in order to prevent the head of the bolt BT and the nut NT from directly contacting the vertical members RP, LP and the horizontal members UB, LB. In this embodiment, the washer plate J2 has a width that is approximately equal to each of the vertical members RP, LP and the horizontal members UB, LB. As a result, when the bolt BT and the nut NT are fastened to each other, the pressing force of the washer plate J2 is distributed over the entire width of each of the vertical members RP, LP and the horizontal members UB, LB, so that the washer plate J2 can be prevented from penetrating into each of the vertical members RP, LP and the horizontal members UB, LB. In particular, it is preferable that the installation area of the washer plate J2 is approximately equal to or larger than the installation area of the joining plate J1. This can further prevent the washer plate J2 from penetrating.

The washer plate J2 only needs to have a strength sufficient to prevent deformation before the vibration control device 1 deforms when the structural frame F is subjected to external disturbances such as earthquake motion or wind, and there are no particular limitations on the material from which it is made. The washer plate J2 can be made of, for example, steel.

The sliding suppression plate J3 is a member that is fixed so as to abut against the side of the joining plate J1 and suppresses the sliding of the joining plate J1. As shown in Figures 2 to 5, the sliding suppression plate J3 is fixed so as to abut against the side of the joining plate J1 along the extension directions (first and second directions X1 and X2, respectively) of the vertical members RP, LP and the horizontal members UB, LB on the surfaces of the vertical members RP, LP and the horizontal members UB, LB to which the joining plate J1 is joined. When the structural frame F is subjected to external disturbances such as earthquake motion or wind, shear forces are generated between the joining plate J1 and the vertical members RP, LP and the horizontal members UB, LB in the extension directions of the vertical members RP, LP and the horizontal members UB, LB. At this time, the joint plate J1 receives this shear force and tries to slide along the extension direction of each of the vertical members RP, LP and the horizontal members UB, LB, but the sliding is suppressed by the sliding suppression plate J3 that is fixed in contact with the side surface of the joint plate J1 along the extension direction of each of the vertical members RP, LP and the horizontal members UB, LB. In particular, the sliding suppression plate J3 is fixed to each of the vertical members RP, LP and the horizontal members UB, LB by a screw BS3 (for example, a coarse thread screw) that penetrates the sliding suppression plate J3 and is screwed into each of the vertical members RP, LP and the horizontal members UB, LB. By screwing the screw BS3 into each of the vertical members RP, LP and the horizontal members UB, LB, no clearance or almost no clearance is generated between the screwed portion of the screw BS3 and each of the vertical members RP, LP and the horizontal members UB, LB. Therefore, the sliding suppression plate J3 fixed by the screws BS3 suppresses the relative movement with respect to the vertical members RP, LP and the horizontal members UB, LB in the direction in which the vertical members RP, LP and the horizontal members UB, LB extend. As a result, the sliding suppression plate J3 suppresses the relative movement of the joint plate J1 with respect to the vertical members RP, LP and the horizontal members UB, LB, thereby suppressing the loss in the transmission of vibration energy from the frame F to the vibration control device 1. Therefore, according to the vibration control frame system VS of this embodiment, vibration energy can be transmitted to the vibration control device 1 more accurately, and better vibration control performance can be obtained.

The screws BS3 for fixing the anti-slip plate J3 need only be capable of fixing the anti-slip plate J3 so that it can prevent the joint plate J1 from sliding in the directions in which the vertical members RP, LP and the horizontal members UB, LB extend, and there are no particular limitations on their arrangement or number. For example, the number of screws BS3 can be set appropriately so as to obtain the required resistance to the sliding of the joint plate J1. Furthermore, the screws BS3 can be arranged in a staggered manner within the installation surface, as shown in Figures 3 and 5. By arranging the screws BS3 in a staggered manner, a large resistance can be imparted to the anti-slip plate J3.

The sliding suppression plate J3 is fixed to abut the side of the joining plate J1 and can suppress the sliding of the joining plate J1, and its shape and size are not particularly limited. In this embodiment, as shown in Figures 2 to 5, the sliding suppression plate J3 is formed in a plate shape that extends in the direction in which the vertical members RP, LP or the horizontal members UB, LB extend (first or second direction X1, X2) and in the width direction (third direction X3) that is approximately perpendicular to the first and second directions X1, X2, corresponding to the vertical members RP, LP or the horizontal members UB, LB to be provided. The size of the sliding suppression plate J3 can be set appropriately depending on, for example, the number of screws BS3 required to suppress the sliding of the joining plate J1. The sliding suppression plate J3 may have a width approximately equal to that of each of the vertical members RP, LP and the horizontal members UB, LB, like the joining plate J1 and the washer plate J2.

In this embodiment, the sliding suppression plate J3 is formed as a separate body from the joining plate J1. For example, in the case of the first embodiment shown in FIG. 1 and FIG. 2, when the vibration damping device 1 to which the joining plate J1 is already attached is joined to each of the vertical members RP, LP and the horizontal members UB, LB, it is difficult to secure a space for working to fix the sliding suppression plate J3 between the vibration damping device 1 and the vertical members RP, LP and the horizontal members UB, LB. In such a case, if the sliding suppression plate J3 is integrated with the joining plate J1, it is difficult to fix the sliding suppression plate J3 with the screws BS. However, since the sliding suppression plate J3 is formed as a separate body from the joining plate J1, it can be easily fixed to each of the vertical members RP, LP and the horizontal members UB, LB before joining the vibration damping device 1. However, for example, when sufficient working space can be secured, the sliding suppression plate J3 may be formed as a single body with the joining plate J1.

The sliding suppression plate J3 is fixed so as to abut against the side of the joining plate J1, and the arrangement is not particularly limited as long as it can suppress the sliding of the joining plate J1. For example, in the first embodiment, as shown in Figures 2 and 3, the sliding suppression plate J3 is arranged to sandwich the joining plates J1 provided on each of the vertical members RP, LP and the horizontal members UB, LB from both sides in the direction in which the vertical members RP, LP and the horizontal members UB, LB extend. This suppresses the sliding of the joining plate J1 on both sides in the direction in which the vertical members RP, LP and the horizontal members UB, LB extend. In the second embodiment, as shown in Fig. 4, for the two mutually connected joint plates J1, J1 (third and fourth joint plates) joined to both the upper horizontal member UB and the second vertical member LP, a sliding suppression plate J3 is arranged so as to abut against the side of the joint plate J1 (third joint plate) joined to the upper horizontal member UB on the side opposite the second vertical member LP, and a sliding suppression plate J3 is arranged so as to abut against the side of the joint plate J1 (fourth joint plate) joined to the second vertical member LP on the side opposite the upper horizontal member UB. As a result, the two mutually connected joint plates J1, J1 (third and fourth joint plates) are suppressed from sliding in both directions in which the upper horizontal member UB and the second vertical member LP extend. Similarly, for the two mutually connected joint plates J1, J1 (fifth and sixth joint plates) joined to both the lower horizontal member LB and the second vertical member LP, a sliding suppression plate J3 is arranged to abut the side of the joint plate J1 (fifth joint plate) joined to the lower horizontal member LB opposite the second vertical member LP, and a sliding suppression plate J3 is arranged to abut the side of the joint plate J1 (sixth joint plate) joined to the second vertical member LP opposite the lower horizontal member LB. As a result, the two mutually connected joint plates J1, J1 (fifth and sixth joint plates) are suppressed from sliding in both the directions in which the lower horizontal member LB and the second vertical member LP extend. In addition, a sliding suppression plate J3 is arranged for the two joining plates J1, J1 (first and second joining plates) of the two vibration damping devices 1, 1 joined to the first vertical member RP so as to sandwich the two joining plates J1, J1 (first and second joining plates) from both sides in the direction in which the first vertical member RP extends. This suppresses the sliding of the two joining plates J1, J1 (first and second joining plates) on both sides in the direction in which the first vertical member RP extends.

The sliding suppression plate J3 only needs to have a strength sufficient to prevent deformation before the vibration control device 1 deforms when the structural frame F is subjected to external disturbances such as earthquake motion or wind, and there are no particular limitations on the material from which it is made. The sliding suppression plate J3 can be made of steel, for example.

Next, with reference to Figures 6 to 12, a buckling restraint structural material that can be used as the vibration control device 1 of the vibration control structure system VS of this embodiment will be described in detail. Below, the vibration control device will be described with the buckling restraint structural material given the reference symbol 1.

As shown in Figures 6 to 8, the buckling restrained structural member 1 comprises a core material 2 extending along the extension direction L, and a wooden restraining member 3 for restraining (suppressing) the buckling of the core material 2. The buckling restrained structural member 1 is incorporated into a structural frame F to absorb vibration energy generated in the structural frame F due to external disturbances such as earthquake motion and wind, and also to resist external forces received from the structural frame F, thereby improving the strength of the structural frame F or suppressing deformation of the structural frame F.

The core material 2 is a member connected to the frame F and absorbs at least a portion of the vibration energy generated in the frame F and/or resists external forces received from the frame. As shown in Figs. 2 and 4, both ends of the core material 2 in the extension direction (extension direction L) are joined to the vertical members RP, LP and horizontal members UB, LB of the frame F via joint structures J. The core material 2 absorbs at least a portion of the vibration energy generated in the frame F by yielding (plastically deforming) when it receives a tensile stress or compressive stress of a predetermined level or more in the extension direction (extension direction L) of the core material 2. The core material 2 is prevented from buckling by the restraining member 3, so it can stably repeat plastic deformation in the extension direction L and absorb relatively large vibration energy. Furthermore, when the core material 2 receives a tensile stress or compressive stress of a predetermined value or less in the direction in which the core material 2 extends, the core material 2 maintains its shape within the range of elastic deformation, thereby resisting the external force received from the structural frame F. Because the core material 2 is prevented from buckling by the restraining member 3, the core material 2 maintains its strength in the direction in which it extends and can resist a relatively large external force.

As shown in Figs. 6 to 8, the core material 2 has a weak axis direction W and a strong axis direction S that are substantially perpendicular to the extension direction L. The weak axis direction W means a direction in which the bending stiffness of the core material 2 is relatively small at least compared to the strong axis direction S, and for example, the bending stiffness of the core material 2 is the smallest among the directions substantially perpendicular to the extension direction L. The strong axis direction S means a direction in which the bending stiffness of the core material 2 is relatively large at least compared to the weak axis direction W, and for example, the bending stiffness of the core material 2 is the largest among the directions substantially perpendicular to the extension direction L. In this embodiment, the core material 2 is formed in a plate shape extending along the extension direction L as shown in Figs. 6 to 8, and among the directions substantially perpendicular to the extension direction L, a direction substantially perpendicular to the plate surface constitutes the weak axis direction W, and a direction substantially parallel to the plate surface constitutes the strong axis direction S. Note that the shape of the core material 2 is not particularly limited as long as it extends at least along the extension direction L and has a weak axis direction W and a strong axis direction S that are substantially perpendicular to the extension direction L, and may have a shape other than a plate shape.

In this embodiment, as shown in Figs. 7 and 8, the core material 2 is attached to the restraining material 3 so that both ends of the core material 2 in the extension direction L protrude from both sides of the restraining material 3 in the extension direction L. Each of the ends of the core material 2 in the extension direction L protruding from both sides of the restraining material 3 is connected to the joint plate J1 of the joint structure J and joined to each of the vertical members RP, LP and the horizontal members UB, LB of the frame F via the joint plate J1. However, as long as the core material 2 can be connected between the two vertical members RP, LP and the horizontal members UB, LB along the extension direction L, it is not limited to this embodiment, and may be attached to the restraining material 3 so that it fits inside both ends of the restraining material 3 in the extension direction L.

The core material 2 is attached to the restraining material 3 so that at least a portion of the core material 2 is allowed to move relative to the restraining material 3 at least along the extension direction L. By allowing the core material 2 to move relative to the restraining material 3 in the extension direction L, when the core material 2 receives a compressive stress of a predetermined amount or more in the extension direction L, it can plastically deform in the extension direction L while being buckled and restrained by the restraining material 3. In addition, when the core material 2 receives a tensile stress or compressive stress of a predetermined amount or less in the extension direction L, it can elastically deform in the extension direction L while being buckled and restrained by the restraining material 3. The method of attaching the core material 2 to the restraining material 3 is not particularly limited as long as at least a portion of the core material 2 is movable relative to the extension direction L. For example, when attaching the restraining material 3 to the core material 2, which will be described in detail below, the pressing force from the restraining material 3 to the core material 2 may be adjusted to allow the core material 2 to move relative to the restraining material 3.

In this embodiment, as shown in FIG. 6 and FIG. 9 to FIG. 11, a self-adhesive 5 is provided between the core material 2 and the weak axis restraint material 31 of the restraint material 3, which will be described later, at approximately the center of the extension direction L of the core material 2, to adhere the core material 2 and the weak axis restraint material 31 to each other. In addition, an unbond material 6 is provided between the core material 2 and the weak axis restraint material 31 and the strong axis restraint material 32 of the restraint material 3, which will be described later, at both sides of the approximately center of the extension direction L of the core material 2, to reduce the frictional force generated between the core material 2 and the weak axis restraint material 31 and the strong axis restraint material 32. By providing the self-adhesive 5 at approximately the center of the extension direction L of the core material 2 in this way, the relative movement of the approximately center part of the core material 2 is suppressed, and the overall position of the core material 2 relative to the restraint material 3 (particularly the weak axis restraint material 31) is approximately fixed. The restraint material 3 can more reliably restrain the core material 2 from buckling by approximately fixing the overall position of the core material 2, which is the object of restraint. In addition, by providing the unbonded material 6 on both sides of the approximate center of the extension direction L of the core material 2, the core material 2 is allowed to move relative to the restraining material 3 (weak axis restraining material 31 and strong axis restraining material 32) on both sides of the approximate center of the extension direction L of the core material 2. By allowing the core material 2 to move relative to the restraining material 3, the above-mentioned plastic deformation and elastic deformation are possible. In addition, the frictional force generated between the core material 2 and the restraining material 3 is reduced by the unbonded material 6, so that the restraining material 3 is prevented from receiving a force (axial force) in the extension direction L from the core material 2. As a result, the restraining material 3 can reduce the force received from the core material 2 by at least the amount of the axial force of the core material 2 that is suppressed, so that the strength for buckling restraint of the core material 2 can be secured. Therefore, the buckling restrained structural material 1 has excellent buckling restraint properties.

Here, the approximately central portion where the self-adhesive 5 is provided means a region of a predetermined length between both ends of the extension direction L of the core material 2. In this embodiment, as shown in FIG. 6, the approximately central portion is set in a region extending a predetermined length along the extension direction L on both sides of the approximate center of the extension direction L of the core material 2. By arranging the approximately central portion around the approximate center of the extension direction L of the core material 2, the relative movement of the core material 2 on both sides of the extension direction L of the approximately central portion can be made symmetrical in the extension direction L, and the vibration energy generated in the frame F can be absorbed symmetrically in the extension direction L. However, the approximately central portion is not limited to this embodiment as long as it is between both ends of the extension direction L of the core material 2, and may be set at a position shifted from the approximate center of the extension direction L of the core material 2.

The size of the portions where the self-adhesive 5 and the unbonding material 6 are provided can be set appropriately within a range that allows relative movement of the portions other than the approximately central portion of the core material 2 while suppressing relative movement of the approximately central portion of the core material 2, and can suppress the axial force that the restraining material 3 receives from the core material 2. For example, the length of the extension direction L of the approximately central portion where the self-adhesive 5 is provided is not particularly limited, but is preferably 1/13 to 1/5, more preferably 1/11 to 1/7, and even more preferably 1/10 to 1/8 of the entire length of the extension direction L of the narrow width portion 22 of the core material 2 described later. The length of the extension direction L of the portion where the unbonding material 6 is provided is not particularly limited, but can be a length corresponding to the portions on both sides of the approximately central region where the self-adhesive 5 is provided.

6 and 10, the self-adhesive 5 is provided in the approximate center of the extension direction L of the core material 2, on both sides facing a pair of weak axis restraint members 31, 31 described below, over approximately the entire length of the width direction (strong axis direction S) of the core material 2. There are no particular limitations on the self-adhesive 5, so long as it is a material that can adhere the core material 2 and the restraint member 3 (particularly the weak axis restraint member 31) to each other and can suppress the relative movement of the core material 2 in the extension direction L with respect to the restraint member 3 (particularly the weak axis restraint member 31), and for example, an acrylic adhesive or butyl rubber can be used.

As shown in FIG. 6, the unbond material 6 includes a weak axis unbond material 61 provided on the side facing each of the pair of weak axis restraint materials 31, 31, and a strong axis unbond material 62 provided on the side facing each of the pair of strong axis restraint materials 32, 32 described later. The weak axis unbond material 61 is provided on both sides facing each of the pair of weak axis restraint materials 31, 31 at both sides of the approximately central portion of the extension direction L of the core material 2. The strong axis unbond material 62 is provided at a position corresponding to each of the pair of strong axis restraint materials 32, 32. The unbond material 6 is not particularly limited as long as it can reduce the friction force generated between the core material 2 and the restraint material 3 and can allow relative movement of the core material 2 in the extension direction L with respect to the restraint material 3, and can be, for example, Teflon (registered trademark), phenolic resin, ultra-high molecular weight polyethylene, etc.

The core material 2 extends along the extension direction L and has a weak axis direction W and a strong axis direction S, and its shape is not particularly limited. In this embodiment, as shown in FIG. 6 and FIG. 7, the core material 2 has wide portions 21, 21 provided at both ends of the extension direction L and a narrow portion 22 provided between the wide portions 21, 21 at both ends of the extension direction L. The wide portion 21 is wider (length in the strong axis direction S) than the narrow portion 22, and the narrow portion 22 is narrower (length in the strong axis direction S) than the wide portion 21. By forming the wide portion 21 at both ends of the extension direction L in this way, the strength of both ends is greater than that of the intermediate region in which the narrow portion 22 is formed, and it is possible to suppress the deformation of both ends of the core material 2 preferentially. In addition, by forming the narrow portion 22 in the intermediate region of the extension direction L, when the core material 2 is subjected to a tensile stress or compressive stress of a predetermined value or more in the extension direction L, the intermediate region of the core material 2 is preferentially deformed. The widths of the wide portion 21 and the narrow portion 22 are not particularly limited, as long as the width of the wide portion 21 is at least wider than the width of the narrow portion 22, and can be set appropriately according to the required strength. For example, the width of the wide portion 21 can be set to 3.0 to 4.0 times the width of the narrow portion 22. The lengths of the wide portion 21 and the narrow portion 22 in the extension direction L are also not particularly limited, and can be set appropriately according to the required strength. For example, the length of the wide portion 21 in the extension direction L can be set to 1/6 to 1/3 of the length of the narrow portion 22 in the extension direction L.

As shown in Figures 6 to 8, the core material 2 may have ribs 23 extending in the weak axis direction W at both ends of the extension direction L. By providing ribs 23 extending in the weak axis direction W at both ends of the extension direction L of the core material 2, the bending rigidity in the weak axis direction W at both ends of the core material 2 is increased, and it is possible to suppress preferential deformation of both ends of the core material 2.

The core material 2 can be configured so that, for example, when subjected to a tensile stress or compressive stress of a predetermined level or more in the extending direction L of the core material 2, it will yield preferentially over other members subjected to the same stress, and when subjected to a tensile stress or compressive stress of a predetermined level or less in the extending direction L of the core material 2, it will maintain its shape within the elastic deformation range. For this purpose, the core material 2 can be formed, for example, from a metal material, preferably from a steel material, and more preferably from a low-yield-point steel material. Low-yield-point steel material is steel material that has a lower carbon content and a lower yield point compared to ordinary steel material, and has a yield point of, for example, 225 N/mm ² The term "low-yield-point steel" refers to a steel material with extremely high ductility and a strength as described below. However, the core material 2 is not particularly limited as long as it is made of a material that, for the above-mentioned purpose, yields preferentially to other components of the buckling-restrained structural material 1 and to the components of the connected structural frame F, and may be made of ordinary steel having a higher yield point than the low-yield-point steel material, or may be made of aluminum or lead having a lower yield point than the low-yield-point steel material.

The restraining member 3 is a member that restrains (suppresses) the buckling of the core material 2 in a direction approximately perpendicular to the extension direction L. More specifically, the restraining member 3 restrains the buckling of the core material 2 in the weak axis direction W and the strong axis direction S that are approximately perpendicular to the extension direction L. By restraining the buckling of the core material 2 in the weak axis direction W and the strong axis direction S, the restraining member 3 enables stable plastic deformation of the core material 2 along the extension direction L when the core material 2 is subjected to a tensile stress or compressive stress of a predetermined level or more in the extension direction L, and enables the core material 2 to absorb relatively large vibration energy. In addition, by restraining the buckling of the core material 2 in the weak axis direction W and the strong axis direction S, when the core material 2 is subjected to a tensile stress or compressive stress of a predetermined level or less in the extension direction L, the restraining member 3 maintains the strength of the core material 2 in the extension direction L and helps the core material 2 resist external forces received from the structural frame F.

As shown in Figures 6 to 8, the restraint material 3 comprises a pair of weak axis restraint materials 31, 31 provided on both sides of the weak axis direction W of the core material 2, and a pair of strong axis restraint materials 32, 32 provided on both sides of the strong axis direction S of the core material 2. The pair of weak axis restraint materials 31, 31 press and clamp the core material 2 in the weak axis direction W, and the pair of strong axis restraint materials 32, 32 press and clamp the core material 2 in the strong axis direction S. As a result, no gaps are formed between the weak axis restraint materials 31 on both sides of the weak axis direction W of the core material 2, and no gaps are formed between the strong axis restraint materials 32 on both sides of the strong axis direction S of the core material 2. In this way, no gap is formed between the core material 2 and the weak axis restraint member 31 and the strong axis restraint member 32, and the weak axis restraint member 31 and the strong axis restraint member 32 are directly or indirectly in contact with the core material 2, and the weak axis restraint member 31 and the strong axis restraint member 32 are attached to the core material 2, thereby reducing the force that protrudes from the core material 2 to the weak axis restraint member 31 and the strong axis restraint member 32 when an external force in the extension direction L is applied to the core material 2. Therefore, the force borne by the weak axis restraint member 31 and the strong axis restraint member 32 to restrain the buckling of the core material 2 is reduced, so that even a wooden restraint member with low strength can obtain excellent buckling restraint properties. In addition, for example, when the core material 2 is subjected to tensile stress in the extension direction L and the length of the core material 2 in the extension direction L increases, the lengths of the weak axis direction W and the strong axis direction S of the core material 2 are simultaneously shortened. Even in such a case, the weak axis restraint member 31 and the strong axis restraint member 32, which are in a state of pressing the core material 2 before the deformation of the core material 2, move or deform in accordance with the deformation of the core material 2, thereby maintaining direct or indirect contact between the core material 2 and the weak axis restraint member 31 and the strong axis restraint member 32. Therefore, even if the core material 2 is deformed by tensile stress in the extension direction L and the length of the core material 2 in the weak axis direction W and the strong axis direction S is shortened, the contact between the core material 2 and the weak axis restraint member 31 and the strong axis restraint member 32 is maintained, and an increase in the force of the core material 2 protruding is suppressed, and excellent buckling restraint properties can be obtained.

As described above, the weak axis restraint members 31 are provided on both sides of the core material 2 in the weak axis direction W, and are members that restrain the buckling of the core material 2 in the weak axis direction W. The weak axis restraint members 31 are fixed to the weak axis restraint members 31 arranged opposite to the opposite side of the weak axis direction W of the core material 2, thereby pressing and clamping the core material 2 in the weak axis direction W. In this embodiment, as shown in FIG. 9, the pair of weak axis restraint members 31, 31 are fixed to each other by a course thread screw B1 extending in the weak axis direction W so as to press and clamp the core material 2 in the weak axis direction W. The course thread screw B1 has a spiral screw groove on the outer periphery, and penetrates one weak axis restraint member 31 (screw hole 31c described later) and is screwed into the other weak axis restraint member 31, thereby drawing the pair of weak axis restraint members 31, 31 in a direction toward each other. The coarse thread screw B1 does not require a through hole to be provided in advance in the weak axis restraint member 31 compared to fixing using a combination of bolts and nuts, so that the pair of weak axis restraint members 31, 31 can achieve a large mutual attraction force without increasing the area of the weak axis restraint member 31 to provide a through hole, and the fastening force to the weak axis restraint member 31 is less likely to deteriorate over time. Therefore, by fixing the pair of weak axis restraint members 31, 31 to each other using the coarse thread screw B1, a high pressing force against the core material 2 can be obtained and the pressing force can be maintained for a long period of time. In addition, by using the coarse thread screw B1 to fix the pair of weak axis restraint members 31, 31, the number of holes to be provided in advance in the weak axis restraint member 31 (necessary when using a bolt) can be reduced, so that the strength of the weak axis restraint member 31 can be maintained high. As the coarse thread screw B1, it is preferable to use a partial thread screw (half thread) in which there is no thread groove from the intermediate position (e.g., a position approximately half the length of the entire length) between the head having a tool hole and the tip to the vicinity of the head, but a thread groove is provided from the intermediate position to the tip. By maintaining the strength of the weak axis restraint material 31 at a high level, excellent buckling restraint properties can be obtained. Note that the pair of weak axis restraint materials 31, 31 are not limited to this embodiment, and may be fixed to each other using other known fixing means, as long as they can be fixed to each other so as to press and clamp the core material 2 in the weak axis direction W.

The weak axis restraint member 31 is provided at least on both sides of the weak axis direction W of the core material 2, and the arrangement is not particularly limited as long as it can restrain the buckling of the core material 2 in the weak axis direction W. In this embodiment, the pair of weak axis restraint members 31, 31 are provided on both sides of the weak axis direction W of both the core material 2 and the pair of strong axis restraint members 32, 32, as shown in Figures 6 to 8. In other words, both the core material 2 and the pair of strong axis restraint members 32, 32 are provided between the pair of weak axis restraint members 31, 31. At this time, the strong axis restraint member 32 provided together with the core material 2 between the pair of weak axis restraint members 31, 31 is preferably formed to a size such that the thickness (length in the weak axis direction W) of the strong axis restraint member 32 is shorter than the thickness (length in the weak axis direction W) of the core material 2 before being provided, as shown in Figures 10 and 12. As a result, when the core material 2 and the pair of strong axis restraint members 32, 32 are sandwiched by the pair of weak axis restraint members 31, 31 in the weak axis direction W, no gap is generated between the pair of weak axis restraint members 31, 31 and the core material 2, but a gap G1 is generated between the pair of weak axis restraint members 31, 31 and the pair of strong axis restraint members 32, 32. The generation of this gap G1 suppresses the pair of strong axis restraint members 32, 32 from hindering the movement of the pair of weak axis restraint members 31, 31 toward each other when the pair of weak axis restraint members 31, 31 are fixed to each other so as to approach each other in the weak axis direction W in order to press and hold the core material 2 in the weak axis direction W. Therefore, the pressing force of the pair of weak axis restraint members 31, 31 on the core material 2 can be increased. Furthermore, as described below, when the strong axis restraint material 32 is compressed in the strong axis direction S, the strong axis restraint material 32 may expand in the weak axis direction W, but the gap G1 between the strong axis restraint material 32 and the weak axis restraint material 31 allows the strong axis restraint material 32 to expand in the weak axis direction W, promoting compression in the strong axis direction S. The gap G1 may disappear due to deformation of the pair of weak axis restraint materials 31, 31 when the pair of weak axis restraint materials 31, 31 are fixed to each other. Alternatively, the gap G1 may disappear due to deformation of the pair of strong axis restraint materials 32, 32 when the pair of side plates 4, 4 are fixed to the pair of weak axis restraint materials 31, 31 as described below. The size of the gap G1 (length in the weak axis direction W) is not particularly limited, but can be set to be, for example, 80% or more and less than 100% of the thickness (length in the weak axis direction W) of the core material 2.

The weak axis restraint member 31 is provided on both sides of the weak axis direction W of the core material 2, and may restrain the buckling of the core material 2 in the weak axis direction W, and its shape is not particularly limited. In this embodiment, as shown in Figures 6 to 8, the weak axis restraint member 31 is formed into a substantially rectangular shape in which a cross section perpendicular to the extension direction L is formed by a side extending in the weak axis direction W and a side extending in the strong axis direction S, and the cross-sectional area is substantially constant along the extension direction L. As can be clearly seen in Figures 7 and 8, the length of the extension direction L of the weak axis restraint member 31 is longer than the length of the extension direction L of the narrow width portion 22 of the core material 2, and shorter than the length of the entire extension direction L of the core material 2. As a result, a portion of the free end side of the wide portion 21 of the core material 2 in the extension direction L protrudes from the end of the pair of weak axis restraint members 31, 31 in the extension direction L, and a portion of the narrow portion 22 side of the wide portion 21 of the core material 2 in the extension direction L and the entire narrow portion 22 in the extension direction L are sandwiched between the pair of weak axis restraint members 31, 31. Also, as can be clearly seen in FIG. 7, the length of the strong axis direction S of the weak axis restraint member 31 is approximately constant over the entire length of the extension direction L, is longer than the length of the strong axis direction S of the narrow portion 22 of the core material 2, and corresponds to the length of the strong axis direction S of the wide portion 21 of the core material 2. As a result, the entire strong axis direction S of the portion of the narrow portion 22 side of the wide portion 21 of the core material 2 in the extension direction L and the entire strong axis direction S of the narrow portion 22 are sandwiched between the pair of weak axis restraint members 31, 31.

As shown in FIG. 6, the surface of the weak axis restraint material 31 facing the core material 2 is formed substantially flat, and the weak axis restraint material 31 comes into direct or indirect surface contact with the plate surface of the core material 2 formed in a plate shape. The surface of the weak axis restraint material 31 facing the core material 2 has rib recesses 31a, 31a at both ends in the extension direction L that can accommodate the ribs 23 of the core material 2. As shown in FIG. 7 and FIG. 11, the rib recesses 31a are formed to a size that forms a gap G2 between the peripheral wall surrounding the rib recesses 31a and the rib 23 when the core material 2 is attached to the weak axis restraint material 31. This prevents the rib 23 from abutting against the peripheral wall of the rib recesses 31a, and prevents the rib 23 from hindering the relative movement of the core material 2 with respect to the weak axis restraint material 31.

As shown in FIG. 6, the weak axis restraint member 31 has a side plate recess 31b for fixing the side plate 4 described later on both sides in the strong axis direction S. The side plate recess 31b is formed to a depth corresponding to the thickness of the side plate 4 (length in the strong axis direction S). As a result, when the side plate 4 is fixed to the side plate recess 31b, the side surface of the weak axis restraint member 31 other than the side plate recess 31b and the surface of the side plate 4 are approximately flush. In addition, the length of the extension direction L of the side plate recess 31b corresponds to the width (length in the extension direction L) of the side plate 4. As a result, when the side plate 4 is fixed to the side plate recess 31b, the relative movement of the side plate 4 in the extension direction L with respect to the weak axis restraint member 31 is suppressed. In addition, the side plate recess 31b extends over the entire length of the weak axis direction W of the weak axis restraint member 31. This allows the side plate 4 to be fixed so as to straddle both of the side plate recesses 31, 31b of the pair of weak axis restraint members 31, 31 (see FIG. 8). The side plate recesses 31b are provided at intervals along the extension direction L according to the number of side plates 4 to be provided. However, for example, when the side plate is formed as a single member extending in the extension direction L of the weak axis restraint member 31, only one side plate recess may be provided to correspond to that side plate. Also, the side plate recess 31b does not necessarily have to be provided, and the side plate 4 may be fixed to a substantially flat side surface of the weak axis restraint member 31. In that case, a complementary member may be fixed to a portion other than the portion to which the side plate 4 is fixed so that the side surface of the weak axis restraint member 31 to which the side plate 4 is fixed is substantially flat.

As shown in FIG. 6, the weak axis restraint material 31 is provided with a screw hole 31c through which the course thread screw B1 can pass. The screw hole 31c is provided near one end and the other end of the weak axis restraint material 31 in the strong axis direction S at a position in the extension direction L corresponding to the narrow width portion 22 of the core material 2, which does not overlap with the narrow width portion 22 of the core material 2 in the weak axis direction W. By providing the screw hole 31c at a position corresponding to the outside of the strong axis direction S of the narrow width portion 22 of the core material 2, when fixing the pair of weak axis restraint materials 31, 31 with the course thread screw B1, the course thread screw B1 can be provided away from the core material 2 without penetrating the core material 2. The screw holes 31c are provided at intervals in the extension direction L so that they alternate between one and the other of the pair of weak axis restraint materials 31, 31 in the extension direction L. As a result, as shown in Figures 7 and 8, the fixing directions of adjacent coarse thread screws B1 in the extension direction L and the strong axis direction S can be reversed, allowing the pair of weak axis restraint members 31, 31 to be fixed in a balanced manner.

The weak axis restraint material 31 is made of wood. There are no particular limitations on the wood used, so long as the weak axis restraint material 31 can be formed to have the strength to restrain buckling in the weak axis direction W of the core material 2. In this embodiment, the weak axis restraint material 31 is made of laminated veneer lumber (LVL) in which multiple plate materials are stacked in the strong axis direction S, as shown in FIG. 6. Note that in other figures, the stacking of plate materials is omitted for ease of viewing. As for wood, other than LVL, for example, laminated lumber, cross-laminated timber (CLT), solid wood, etc. can be used.

The strong axis restraint members 32 are provided on both sides of the core material 2 in the strong axis direction S, and are members that restrain the buckling of the core material 2 in the strong axis direction S. The strong axis restraint members 32 are attached to the core material 2 so as to press and clamp the core material 2 in the strong axis direction S. The method of attaching the strong axis restraint members 32 to the core material 2 is not particularly limited as long as the strong axis restraint members 32 can be attached to the core material 2 so as to press and clamp the core material 2 in the strong axis direction S. In this embodiment, the pair of strong axis restraint members 32, 32 are attached to the core material 2 by a pair of side plates 4, 4 (side plates 41, 41 for the strong axis restraint members described later) fixed to the side surfaces on both sides of the weak axis restraint member 31 in the strong axis direction S, as shown in Figures 6 to 8. As shown in FIG. 10, the pair of side plates 4, 4 (side plates 41, 41 for the strong axis restraint members) are fixed to the pair of weak axis restraint members 31, 31 so as to compress the pair of strong axis restraint members 32, 32 in the strong axis direction S between them and the core material 2. The pair of strong axis restraint members 32, 32 compressed in the strong axis direction S clamp the core material 2 by pressing it with their repulsive force against the compression.

The strong axis restraint members 32 are provided on both sides of the core material 2 in the strong axis direction S, and the shape of the strong axis restraint member 32 is not particularly limited as long as it can restrain the buckling of the core material 2 in the strong axis direction S. In this embodiment, the strong axis restraint member 32 is formed in a substantially rectangular flat plate shape formed by a side extending in the extension direction L and a side extending in the strong axis direction S, as shown in FIG. 6. The pair of strong axis restraint members 32, 32 are formed to a size such that the sum of the lengths in the strong axis direction S of the core material 2 and the pair of strong axis restraint members 32, 32 is longer than the length of the strong axis direction S of the weak axis restraint member 31, 31 before the pair of side plates 4, 4 (side plates 41, 41 for the strong axis restraint member) are fixed to the pair of weak axis restraint members 31, 31, as shown in FIG. 12. Therefore, the pair of strong axis restraint members 32, 32 protrude outward in the strong axis direction S from the side surface (bottom surface of the side plate recess 31b) of the pair of weak axis restraint members 31, 31 in the strong axis direction S when the pair of side plates 4, 4 (side plates 41, 41 for the strong axis restraint members) are not fixed to the pair of weak axis restraint members 31, 31. By fixing the pair of side plates 4, 4 (side plates 41, 41 for the strong axis restraint members) to the pair of weak axis restraint members 31, 31 from the state in which the pair of strong axis restraint members 32, 32 protrude from the side surfaces of the pair of weak axis restraint members 31, 31 (the state in FIG. 12 ), the pair of strong axis restraint members 32, 32 are pressed between the core material 2 and the pair of side plates 4, 4 and compressed in the strong axis direction S. The compressed pair of strong axis restraint members 32, 32 sandwich the core material 2 so as to press it by a repulsive force against compression. The protruding portions of the pair of strong axis restraint members 32, 32 may disappear due to deformation of the pair of strong axis restraint members 32, 32 when the pair of side plates 4, 4 are fixed to the pair of weak axis restraint members 31, 31. The size of the protruding portions of the pair of strong axis restraint members 32, 32 (length in the strong axis direction S) is not particularly limited, but can be set to a size (shorter length) smaller than the depth (length in the strong axis direction S) of the side plate recess 31b, for example, and can be set so that the sum of the lengths of the core material 2 and the pair of strong axis restraint members 32, 32 in the strong axis direction S exceeds 100% and is equal to or smaller than 105% of the length of the weak axis restraint member 31 in the strong axis direction S.

In this embodiment, as shown in Figures 6 and 7, a pair of strong axis restraint members 32, 32 are provided at intervals over substantially the entire length of the extension direction L of the narrow width portion 22 of the core material 2 (11 in the illustrated example). By arranging the multiple strong axis restraint members 32 at intervals from each other along the extension direction L, a fixing means (course thread screw B1) for fixing the pair of weak axis restraint members 31, 31 to each other can be provided in a place where the strong axis restraint member 32 is not provided without processing the strong axis restraint member 32 (for example, without providing a through hole) (see Figures 7 and 9). In addition, in a place where the strong axis restraint member 32 is not provided, the movement of the pair of weak axis restraint members 31, 31 toward each other is not restricted, so that the pair of weak axis restraint members 31, 31 can be moved in a direction toward each other without being restricted by the strong axis restraint member 32, and sufficient pressing force can be applied to the core material 2. The number of strong axis restraint members 32 is not particularly limited, but from the viewpoint of reducing the frictional force generated between the core material 2 by reducing the size of each strong axis restraint member 32 and increasing the number of strong axis restraint members 32 to increase the number of spaces between the strong axis restraint members 32, three or more are preferable, six or more are more preferable, and nine or more are even more preferable. As a result, the strong axis restraint member 32 is prevented from receiving an axial force in the extension direction L from the core material 2, so that the buckling restrained structural material 1 can obtain a better buckling restraint property. In addition, from the viewpoint of ease of installation of the strong axis restraint member 32, the number of strong axis restraint members 32 is preferably 19 or less, more preferably 16 or less, and even more preferably 13 or less. However, as long as each of the pair of strong axis restraint members 32, 32 is provided on both sides of the strong axis direction S of the core material 2, it is not limited to the above example, and it may be provided as one member so as to extend over approximately the entire length of the extension direction L of the narrow width portion 22.

The strong axis restraint member 32 is made of wood. There are no particular limitations on the wood used, so long as the strong axis restraint member 32 can be formed to have the strength to restrain buckling in the strong axis direction S of the core material 2. There are no particular limitations on the wood that constitutes the strong axis restraint member 32, and examples that can be used include solid wood, laminated timber, LVL, and CLT.

As described above, the buckling restraint structural member 1 may include a pair of side plates 4, 4 fixed to both side surfaces of the weak axis restraint member 31 in the strong axis direction S, as shown in Figures 6 and 7. The side plate 4 is a member fixed so as to straddle both of the pair of weak axis restraint members 31, 31 on both side surfaces of the weak axis restraint member 31 in the strong axis direction S. In this embodiment, the side plate 4 includes a strong axis restraint member side plate 41 for attaching the strong axis restraint member 32 to the core material 2 so as to press against the core material 2, and a weak axis restraint member side plate 42 for fixing the ends of the pair of weak axis restraint members 31, 31 in the extension direction L to each other.

As shown in Figures 6 to 8 and 10, the side plate 41 for the strong axis restraint material is fixed to the side surfaces on both sides of the pair of weak axis restraint materials 31, 31 in the strong axis direction S so that the pair of strong axis restraint materials 32, 32 press and clamp the core material 2 in the strong axis direction S. In this embodiment, the side plate 41 for the strong axis restraint material is formed in a flat plate shape and is fixed to the side surfaces of the pair of weak axis restraint materials 31, 31 in the strong axis direction S arranged approximately flush with each other (see Figure 10). Here, as described above, the pair of strong axis restraint materials 32, 32 protrude from the side surfaces of the pair of weak axis restraint materials 31, 31 before the side plate 41 for the strong axis restraint material is fixed to the side surfaces of the pair of weak axis restraint materials 31, 31 (see Figure 12). When the pair of strong axis restraint member side plates 41, 41 are fixed to the side surfaces of the pair of weak axis restraint members 31, 31, they press the pair of strong axis restraint members 32, 32 toward the core material 2 so that the ends of the pair of strong axis restraint members 32, 32 are approximately flush with the side surfaces of the pair of weak axis restraint members 31, 31. As a result, the core material 2 is pressed and sandwiched by the pair of strong axis restraint members 32, 32 from both sides in the strong axis direction S. However, the strong axis restraint member side plates only need to be configured to press the strong axis restraint members toward the core material, and may be formed, for example, not flat, but with a portion protruding toward the strong axis restraint member, and may be configured so that the protruding portion presses the strong axis restraint member when fixed to the weak axis restraint member.

The strong axis restraint member side plate 41 can be fixed to the weak axis restraint member 31 by a fixing screw B2, as shown in Figs. 7, 8 and 10, although it is not particularly limited thereto. The fixing screw B2 has a helical screw groove on the outer periphery, and is screwed into the weak axis restraint member 31 through a screw hole 41a provided in the strong axis restraint member side plate 41, thereby fixing the strong axis restraint member side plate 41 to the weak axis restraint member 31. By using the fixing screw B2 to fix the strong axis restraint member side plate 41 to the weak axis restraint member 31, it is not necessary to previously provide a hole in the weak axis restraint member 31, so that the strength of the weak axis restraint member 31 can be maintained high. The buckling restraint structural member 1 can obtain excellent buckling restraint properties by maintaining the strength of the weak axis restraint member 31 high. The fixing screw B2 is not particularly limited, and a known screw such as a tapping screw can be used.

In this embodiment, as shown in Figures 8 and 10, the side plate 41 for the strong axis restraint material is fixed to one of the weak axis restraint materials 31 with one fixing screw B2, and is fixed to the other weak axis restraint material 31 with one fixing screw B2. Note that the side plate 41 for the strong axis restraint material is not limited to this embodiment, and may be fixed using other known fixing means, as long as it is fixed to the weak axis restraint material 31 so as to press and clamp the core material 2 against the strong axis restraint material 32 in the strong axis direction S.

The material of the side plate 41 for the strong axis restraint member is not particularly limited, so long as it has the strength to attach the pair of strong axis restraint members 32, 32 to the core material 2 so that the pair of strong axis restraint members 32, 32 press and clamp the core material 2 in the strong axis direction S. The side plate 41 for the strong axis restraint member can be made of wood, for example. The wood used is not particularly limited, and examples include solid wood, laminated wood, LVL, and CLT.

As shown in Figures 6 to 8 and 11, the side plate 42 for the weak axis restraint material is fixed to both sides of the end of the pair of weak axis restraint materials 31, 31 in the strong axis direction S so that the ends of the pair of weak axis restraint materials 31, 31 in the extension direction L sandwich the wide portion 21 of the core material 2 in the weak axis direction W. In this embodiment, the side plate 42 for the weak axis restraint material is formed in a flat plate shape and is fixed to the side surface of the pair of weak axis restraint materials 31, 31 in the strong axis direction S arranged approximately flush with each other (see Figure 11). The side plate 42 for the weak axis restraint material can be fixed to the weak axis restraint material 31 by a fixing screw B2, although it is not particularly limited. The fixing screw B2 has a spiral screw groove on the outer periphery, and is screwed into the weak axis restraint material 31 through a screw hole 42a provided in the side plate 42 for the weak axis restraint material, thereby fixing the side plate 42 for the weak axis restraint material to the weak axis restraint material 31. By using the fixing screw B2 to fix the side plate 42 for the weak axis restraint member to the weak axis restraint member 31, there is no need to pre-drill holes in the weak axis restraint member 31, so the strength of the weak axis restraint member 31 can be maintained high. The buckling restraint structural member 1 can obtain excellent buckling restraint properties by maintaining the strength of the weak axis restraint member 31 high.

Here, as described above, the width (length in the strong axis direction S) of the weak axis restraint material 31 corresponds to the width (length in the strong axis direction S) of the wide portion 21 of the core material 2. Therefore, at both ends of the extension direction L of the pair of weak axis restraint materials 31, 31, it is not possible to provide a course thread screw B1 for fixing the weak axis restraint materials 31, 31 to each other. If the ends of the weak axis restraint materials 31, 31 are not sufficiently fixed, the core material 2 is likely to buckle locally at the ends. In this embodiment, as shown in FIG. 11, the pair of weak axis restraint materials 31, 31 are fixed to each other at a position corresponding to the wide portion 21 of the core material 2 by fixing a pair of side plates 4, 4 (side plates 42, 42 for the weak axis restraint material) to the side surfaces on both sides of the pair of weak axis restraint materials 31, 31 in the strong axis direction S with a fixing screw B2 (optionally in combination with adhesive A). In particular, the side plate 42 for the weak axis restraint member is fixed with a larger number of fixing screws B2 (two for one weak axis restraint member 31 and two for the other weak axis restraint member 31) than the side plate 41 for the strong axis restraint member provided at a position corresponding to the narrow width portion 22 of the core material 2 (optionally using adhesive A in combination). This allows the pair of weak axis restraint members 31, 31 to be firmly fixed to each other at a position corresponding to the wide width portion 21 of the core material 2. By fixing the pair of weak axis restraint members 31, 31 to each other only by fixing the pair of side plates 4, 4 with the fixing screws B2 (optionally using adhesive A in combination), it is not necessary to increase the width (length in the strong axis direction S) of the weak axis restraint member 31 at a position corresponding to the wide width portion 21 of the core material 2 to secure a position for providing the course thread screw B1, so the buckling restraint structural material 1 can be made smaller. The adhesive A that is optionally used in combination is not particularly limited, and a known adhesive such as epoxy resin can be used.

There are no particular limitations on the material that the weak axis restraint side plate 42 is made of, so long as it has the strength to attach the pair of weak axis restraint members 31, 31 to the core material 2 so that the pair of weak axis restraint members 31, 31 sandwich the core material 2 in the weak axis direction W. The weak axis restraint side plate 42 can be made of wood, for example. There are no particular limitations on the wood that can be used, and examples include solid wood, laminated timber, LVL, and CLT.

Next, a method for manufacturing the buckling-constrained structural material 1 will be described. Below, several steps performed in the manufacturing method will be described, but not all steps necessarily need to be performed, and the order of the steps performed is not limited to the order described below. Furthermore, the steps shown below are an example, and the manufacturing method for the buckling-constrained structural material 1 is not limited to the example below.

As shown in Figures 6 to 8, the manufacturing method of the buckling restrained structural material 1 includes a step of providing a pair of weak axis restraint members 31, 31 on both sides of the weak axis direction W of the core material 2 so as to press and clamp the core material 2 in the weak axis direction W, and a step of providing a pair of strong axis restraint members 32, 32 on both sides of the strong axis direction S of the core material 2 so as to press and clamp the core material 2 in the strong axis direction S. In the buckling restrained structural material 1 manufactured by these steps, as described above, no gap is formed between the core material 2 and the weak axis restraint members 31 and the strong axis restraint members 32, and the core material 2 is in direct or indirect contact with the weak axis restraint members 31 and the strong axis restraint members 32, and the force that protrudes from the core material 2 to the weak axis restraint members 31 and the strong axis restraint members 32 when an external force in the extension direction L is applied to the core material 2 is reduced. Therefore, the force borne by the weak axis restraint member 31 and the strong axis restraint member 32 to restrain the buckling of the core material 2 is reduced, so that excellent buckling restraint can be obtained even with a low-strength wooden restraint member.

As shown in Figures 6, 9 to 11, the manufacturing method of the buckling restraint structural material 1 may include a step of providing a self-adhesive 5 between the core material 2 and the weak axis restraint material 31 of the restraint material 3 at approximately the center of the extension direction L of the core material 2, which adheres the core material 2 and the weak axis restraint material 31 of the restraint material 3 to each other, and a step of providing an unbond material 6 between the core material 2 and the weak axis restraint material 31 and the strong axis restraint material 32 at both sides of the approximately central portion of the extension direction L of the core material 2, which reduces the frictional force generated between the core material 2 and the weak axis restraint material 31 and the strong axis restraint material 32 of the restraint material 3. By providing the self-adhesive 5 at approximately the center of the extension direction L of the core material 2 in this way, the relative movement of the approximately central portion of the core material 2 is suppressed, and the overall position of the core material 2 relative to the restraint material 3 (particularly the weak axis restraint material 31) is approximately fixed. In addition, by providing the unbond material 6 on both sides of the approximate center of the extension direction L of the core material 2, the core material 2 can move relative to the restraining material 3 on both sides of the approximate center of the extension direction L of the core material 2. However, for example, when providing the weak axis restraining material 31 and the strong axis restraining material 32, the pressing force from the weak axis restraining material 31 and the strong axis restraining material 32 to the core material 2 can be adjusted to suppress the relative movement of a part of the core material 2 and allow the relative movement of the other part of the core material 2 without providing the self-adhesive 5 and the unbond material 6.

The process of providing the pair of weak axis restraint members 31, 31 may include a process of fixing the pair of weak axis restraint members 31, 31 to each other with a course thread screw B1 extending in the weak axis direction W so as to press and clamp the core material 2 in the weak axis direction W, as shown in Figures 8 and 9. In this process, the course thread screw B1 is screwed into the other weak axis restraint member 31 through the screw hole 31c of one weak axis restraint member 31. By fixing the pair of weak axis restraint members 31, 31 to each other with the course thread screw B1, as described above, it is possible to obtain a high pressing force against the core material 2 and to maintain the pressing force for a long period of time. However, the pair of weak axis restraint members 31, 31 may be fixed to each other using other known fixing means.

The step of providing the pair of weak axis restraint members 31, 31 may include a step of providing the pair of weak axis restraint members 31, 31 on both sides of the weak axis direction W of both the core material 2 and the pair of strong axis restraint members 32, 32, as shown in Figures 7 and 10. In this case, it is preferable that the strong axis restraint member 32 is formed to a size such that the length of the weak axis direction W of the strong axis restraint member 32 is shorter than the length of the weak axis direction W of the core material 2 before being provided. As a result, as described above, when the pair of weak axis restraint members 31, 31 are fixed to each other, the pair of strong axis restraint members 32, 32 are prevented from hindering the movement of the pair of weak axis restraint members 31, 31 toward each other, so that the pressing force of the pair of weak axis restraint members 31, 31 on the core material 2 can be increased.

The step of providing the pair of strong axis restraint members 32, 32 may include a step of fixing a pair of side plates 4, 4 (side plates 41, 41 for the strong axis restraint members) to both sides of the weak axis restraint member 31 in the strong axis direction S so that the pair of strong axis restraint members 32, 32 are compressed in the strong axis direction S between the core material 2, as shown in FIG. 10. The pair of strong axis restraint members 32, 32 compressed in the strong axis direction S clamp the core material 2 so as to press it by the repulsive force against the compression. In order to provide the pair of strong axis restraint members 32, 32 so as to be compressed in the strong axis direction S, for example, the pair of strong axis restraint members 32, 32 are formed to a size such that the sum of the lengths in the strong axis direction S of the core material 2 and the pair of strong axis restraint members 32, 32 is longer than the length in the strong axis direction S of the weak axis restraint member 31, as shown in FIG. 12, before the pair of side plates 4, 4 (side plates 41, 41 for the strong axis restraint members) are fixed to the pair of weak axis restraint members 31, 31. In this case, the pair of strong axis restraint members 32, 32 protrude outward in the strong axis direction S from the side surface (bottom surface of the side plate recess 31b) of the pair of weak axis restraint members 31, 31 in the strong axis direction S when the pair of side plates 4, 4 (side plates 41, 41 for the strong axis restraint members) are not fixed to the pair of weak axis restraint members 31, 31. By fixing the pair of side plates 4, 4 (side plates 41, 41 for the strong axis restraint members) to the pair of weak axis restraint members 31, 31 from the state in which the pair of strong axis restraint members 32, 32 protrude from the side surfaces of the pair of weak axis restraint members 31, 31 (the state in FIG. 12), the pair of strong axis restraint members 32, 32 are pressed between the core material 2 and the pair of side plates 4, 4 and compressed in the strong axis direction S.

In this embodiment, as described above, the core material 2 has wide portions 21, 21 provided at both ends of the extension direction L, and narrow portions 22 provided between the wide portions 21, 21 at both ends of the extension direction L, as shown in Figures 6 and 7. The width of the weak axis restraint material 31 (length in the strong axis direction S) corresponds to the width of the wide portion 21 of the core material 2 (length in the strong axis direction S). Therefore, at both ends of the pair of weak axis restraint materials 31, 31 in the extension direction L, it is not possible to provide a course thread screw B1 for fixing the weak axis restraint materials 31, 31 to each other. If the ends of the weak axis restraint materials 31, 31 are not sufficiently fixed, the core material 2 is more likely to buckle locally at the ends. Therefore, as shown in FIG. 11, the process of providing the pair of weak axis restraint members 31, 31 may include a process of fixing the pair of weak axis restraint members 31, 31 to each other by fixing a pair of side plates 4, 4 (side plates 42, 42 for the weak axis restraint members) to both side surfaces of the pair of weak axis restraint members 31, 31 in the strong axis direction S at a position corresponding to the wide portion 21 of the core material 2 with a fixing screw B2 (optionally in combination with adhesive A). This makes it possible to more firmly restrain the buckling of the wide portion 21 of the core material 2.

The step of providing a pair of strong axis restraint members 32, 32 may include a step of providing a pair of strong axis restraint members 32, 32 over substantially the entire length of the narrow width portion 22 in the extension direction L, as shown in Figures 6 and 7. In the illustrated example, a pair of strong axis restraint members 32, 32 are provided at intervals over substantially the entire length of the narrow width portion 22 in the extension direction L of the core material 2 (11 in the illustrated example). By arranging the multiple strong axis restraint members 32 at intervals from each other along the extension direction L, as described above, it is possible to apply sufficient pressing force from the pair of weak axis restraint members 31, 31 to the core material 2. However, each of the pair of strong axis restraint members 32, 32 may be provided as a single member so as to extend over substantially the entire length of the narrow width portion 22 in the extension direction L.

1. Vibration control device (buckling restraint structural material)
2. Core material
21 Wide section
22 Narrow width section
23 Rib
3. Restraint material
31 Weak axis restraint material
31a Rib recess
31b Side plate recess
31c Screw hole
32 Strong axis restraint material
4 Side plate
41 Side plate for strong axis restraint material
41a Screw hole
42 Side plate for weak axis restraint material
42a Screw hole
5. Self-adhesive
6 Unbonded material
61 Weak axis unbonded material
62 Strong axis unbonded material
A. Adhesive
B1 Course Thread Screw
B2 Fixing screw
BS1, BS2, BS3 bis
BT Bolt
F Structural frame
G1, G2 gap
J Joint structure
J1 Joint plate
J2 Washer plate
J3 Sliding suppression plate
J4 Rib Plate
L Extension direction
LB Lower cross member
LB1 protrusion
LB2 Recess
LP 2nd vertical member
LP1 Recess
LP2 convex part
NT Nut
RP First vertical member
RP1 Recess
RP2 convex part
S Strong axis direction
UB Upper cross member
UB1 convex part
UB2 Recess
VS Vibration Control System
W Weak axis direction
X1 First direction
X2 Second direction
X3 Third direction

Claims (10)

A structural frame having wooden vertical and horizontal members;
A vibration control device joined to the frame;
a joining structure for joining the vibration damping device to the frame,
The joining structure is
a joining plate provided at each end of the vibration damping device and joined to each of the vertical members and the horizontal members;
a washer plate provided to sandwich each of the vertical members and the horizontal members together with the joining plate;
A sliding suppression plate is fixed to a side of the joining plate along the extending direction of each of the vertical members and the horizontal members on the surface where the joining plate is joined,
the joining plate is joined to each of the vertical members and the horizontal members by bolts passing through the joining plate, each of the vertical members and the horizontal members, and the washer plate;
The sliding suppression plate is fixed to each of the vertical members and the horizontal members by screws that penetrate the sliding suppression plate and are screwed into each of the vertical members and the horizontal members.
Vibration control structure system. The sliding suppression plates are arranged to sandwich the joining plate from both sides in the extending direction of the vertical members and the horizontal members.
The vibration-damping structure system according to claim 1 . the longitudinal members include a first longitudinal member and a second longitudinal member;
the cross member includes an upper cross member and a lower cross member;
the vibration damping device includes a first vibration damping device and a second vibration damping device;
One end of the first vibration damping device is joined to the first vertical member via a first joining plate, and the other end of the first vibration damping device is joined to the upper horizontal member and the second vertical member via a first joining member,
One end of the second vibration damping device is joined to the first vertical member via a second joining plate, and the other end of the second vibration damping device is joined to the lower horizontal member and the second vertical member via a second joining member,
The first joining plate and the second joining plate are arranged to abut against each other in an extending direction of the first vertical member,
The sliding suppression plates are arranged to sandwich the first joining plate and the second joining plate from both sides in the extension direction of the first vertical member,
The first joint member is integrally formed with a third joint plate joined to the upper horizontal member and a fourth joint plate joined to the second vertical member,
The sliding suppression plate is arranged so as to abut against a side surface of the third joining plate opposite the second vertical member, and the sliding suppression plate is arranged so as to abut against a side surface of the fourth joining plate opposite the upper horizontal member,
The second joint member is integrally formed with a fifth joint plate joined to the lower horizontal member and a sixth joint plate joined to the second vertical member,
The sliding suppression plate is arranged so as to abut against a side surface of the fifth joining plate opposite to the second vertical member, and the sliding suppression plate is arranged so as to abut against a side surface of the sixth joining plate opposite to the lower horizontal member.
The vibration-damping structure system according to claim 1 . the joining plate and the washer plate have a width substantially equal to that of each of the vertical members and the horizontal members;
The installation area of the washer plate is approximately equal to or greater than the installation area of the joining plate.
A vibration-damping structure system according to any one of claims 1 to 3. One of the vertical member and the horizontal member has a convex portion, and the other of the vertical member and the horizontal member has a concave portion,
The vertical members and the horizontal members are fixed to each other by fitting the convex portions into the concave portions,
A screw is screwed into the recess of the other of the vertical member and the horizontal member in the extension direction of the other of the vertical member and the horizontal member so as to extend along the extension direction of one of the vertical member and the horizontal member.
A vibration-damping structure system according to any one of claims 1 to 4. The strength of the joint structure is 1.3 times or more the strength of the vibration damping device.
A vibration-damping structure system according to any one of claims 1 to 5. The vibration damping device is
A core material extending along an extension direction and having a weak axis direction and a strong axis direction substantially perpendicular to the extension direction;
a wooden restraining member for restraining buckling of the core material in the weak axis direction and the strong axis direction,
The restraining material is
a pair of weak axis restraint members provided on both sides of the core material in the weak axis direction so as to press and sandwich the core material in the weak axis direction;
A pair of strong axis restraint members are provided on both sides of the core material in the strong axis direction so as to press and sandwich the core material in the strong axis direction.
A vibration-damping structure system according to any one of claims 1 to 6. The vibration damping device includes a pair of side plates fixed to both side surfaces of the weak axis restraint member in the strong axis direction,
The pair of side plates are fixed to the pair of weak axis restraint members so as to compress the pair of strong axis restraint members in the strong axis direction between the pair of side plates and the core material.
The vibration-damping structure system according to claim 7. the pair of weak axis restraint members are disposed on both sides of the core member and the pair of strong axis restraint members in the weak axis direction,
The pair of strong axis restraint members are formed to a size such that a sum of the lengths of the core material and the pair of strong axis restraint members in the strong axis direction is longer than a length of the weak axis restraint member in the strong axis direction before the pair of side plates are fixed to the pair of weak axis restraint members.
The vibration-damping structure system according to claim 8. Between the core material and the weak axis restraint material, a self-adhesive is provided in an approximately central portion of the core material in the extension direction, which adheres the core material and the weak axis restraint material to each other, and between the core material and the weak axis restraint material and the strong axis restraint material, an unbond material is provided in both sides of the approximately central portion of the core material in the extension direction, which reduces frictional forces generated between the core material and the weak axis restraint material and the strong axis restraint material.
A vibration-damping structure system according to any one of claims 7 to 9.

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