JP7516708B2 - Reinforcement structure for wooden buildings - Google Patents

Description

The present invention relates to a reinforcing structure for wooden buildings.

The following Patent Document 1 describes a bearing wall structure equipped with a vibration damper device.

JP 2018-62811 A

In the load-bearing wall structure of the building shown in Patent Document 1, vibration dampers are installed in the wall framing of a wooden building. In wooden buildings, the rigidity of the floor surface is smaller than that of buildings made of reinforced concrete. For this reason, the floor surface may deform during an earthquake. In this case, even if the wall framing is reinforced, it is difficult for the seismic force to act on the wall framing, and the vibration dampers may not be able to effectively exert their vibration-damping effect.

Taking the above facts into consideration, the present invention aims to provide a reinforcing structure for wooden buildings that can effectively utilize the effects of reinforcing members that reinforce structural surfaces along the vertical direction.

The reinforcement structure for a wooden building of claim 1 comprises a vertical reinforcement member that provides vibration- damping reinforcement to the structural surface along the up-down direction sandwiched between adjacent wooden pillars, and a horizontal reinforcement member that is joined to a wooden beam joined to the pillar and is a structural surface along the horizontal direction surrounded by the beam, and provides seismic reinforcement to each of two adjacent structural surfaces sandwiched between the beams, wherein the horizontal reinforcement member reinforces the structural surface along the horizontal direction surrounded by each of the beams joined above and below the pillar.

In the reinforcement structure for a wooden building described in claim 1, the structural surface along the vertical direction sandwiched between the columns is reinforced by vertical reinforcement members. Also, the structural surface along the horizontal direction surrounded by the beams joined to the columns is reinforced by horizontal reinforcement members. This makes it difficult for the structural surface along the horizontal direction to deform out of plane even if a horizontal force acts on the wooden building during an earthquake. As a result, seismic forces are more likely to act on the structural surface along the vertical direction sandwiched between the columns. Therefore, the effect of the vertical reinforcement members reinforcing the structural surface along the vertical direction can be effectively demonstrated.
The reinforcement structure for a wooden building of claim 2 is the reinforcement structure for a wooden building of claim 1, in which the horizontal reinforcement members are fire beams arranged at the four corners of the structural surface.

In one embodiment of the reinforcement structure for a wooden building, the horizontal reinforcement member reinforces the structural surface along the horizontal direction surrounded by each beam joined above and below the column.

In one embodiment of the reinforcement structure for a wooden building, the structural surfaces above and below the structural surface reinforced by the vertical reinforcement members are reinforced by horizontal reinforcement members. Therefore, earthquake forces are more likely to act on the structural surfaces above and below the structural surface reinforced by the vertical reinforcement members than if either one of the structural surfaces were not reinforced by the horizontal reinforcement members. Therefore, the effect of the vertical reinforcement members reinforcing the structural surfaces above and below the vertical reinforcement members can be more effectively exerted.

The reinforcement structure for a wooden building of claim 3 is a reinforcement structure for a wooden building as described in claim 1 or claim 2 , and comprises fixing members that are inserted and fixed into through holes formed at two locations, above and below, of the columns of a wooden column-beam frame with their ends protruding into the frame, a first steel cross member whose both ends are pin-joined to the upper fixing members of the adjacent columns using steel rods as rotation axes, a second steel cross member whose both ends are pin-joined to the lower fixing members of the adjacent columns using steel rods as rotation axes , and vibration-damping members attached to the first cross member and the second cross member.

In the reinforcement structure for a wooden building described in claim 3, a first horizontal member and a second horizontal member made of steel are placed above and below adjacent columns. The first horizontal member and the second horizontal member are fitted with vibration-damping members. As a result, when the structural surface sandwiched between the columns deforms during an earthquake, the vibration-damping members deform. At this time, the vibration-damping members may deform significantly, and a large force may act on the first horizontal member and the second horizontal member. Even in such a case, the first horizontal member and the second horizontal member are made of steel and are therefore unlikely to be damaged. This allows the vibration-damping members to fully demonstrate their vibration-damping performance.

The first and second cross members are also pin-jointed to the columns. This makes the first and second cross members easily deformable, and the deformation of the structural surface sandwiched between the columns is easily transmitted to the vibration-damping member. This makes it possible to efficiently utilize the vibration-damping performance of the vibration-damping member.

Furthermore, because the first and second cross members are pin-jointed to the columns, the stress generated in the first and second cross members is less likely to be transmitted to the columns. This reduces damage to the columns. In contrast, if the first and second cross members were "rigidly joined" to the columns, the joints would be more susceptible to damage.

The present invention provides a reinforcing structure for a wooden building that can effectively utilize the effects of reinforcing members that reinforce structural surfaces along the vertical direction.

1 is a perspective view showing a part of a building frame to which a reinforcement structure for a wooden building according to the first and second embodiments of the present invention is applied. FIG. (A) is an elevational view showing the state of the building frame before the reinforcement structure of a wooden building in the first embodiment of the present invention is applied, (B) is an elevational view showing the state after the crosspiece has been removed from the frame, and (C) is an elevational view showing the state after a fixing member has been fixed into the through hole formed by removing the crosspiece. (A) is an elevational view showing the reinforcement structure for a wooden building in accordance with the first embodiment of the present invention, (B) is a cross-sectional view taken along line B-B in (A), and (C) is a cross-sectional view taken along line C-C in (A). 1A is an elevational view showing a modified example of a fixing method for a fixing member in a reinforcement structure for a wooden building according to the first embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line B-B in FIG. FIG. 1A is a schematic diagram showing a reinforcement structure for a wooden building in accordance with the first embodiment of the present invention, FIG. 1B is a schematic diagram showing the state in which a horizontal force acts on the building during an earthquake, and FIG. 1C is a moment diagram. (A) is a schematic diagram showing the reinforcement structure of a wooden building in a modified example in which a column is rigidly connected to a first cross member and a second cross member, (B) is a schematic diagram showing the state in which a horizontal force acts on the building during an earthquake in the modified example, and (C) is a moment diagram. FIG. 2A is an oblique view showing a state in which a horizontal force acts on a building when a horizontal structural reinforcement member is provided in the reinforcement structure for a wooden building according to the first and second embodiments of the present invention, and FIG. 2B is an oblique view showing a state in which a horizontal force acts on a building in a comparative example in which a horizontal structural reinforcement member is not provided. 1 is an elevational view showing modified examples of the first cross member and the second cross member in the reinforcement structure for a wooden building according to the first embodiment of the present invention. FIG. 1A is an elevational view showing a reinforcement structure for a wooden building according to a second embodiment of the present invention, and FIG. 1B is a perspective view showing a method of joining vertical frame members and horizontal frame members.

[First embodiment]
Hereinafter, a reinforcement structure for a wooden building according to a first embodiment of the present invention will be described with reference to the drawings. Components indicated with the same reference numerals in each drawing are the same components. Also, explanations of configurations and reference numerals that overlap in each drawing may be omitted. Note that the present invention is not limited to the following embodiment, and can be implemented with appropriate modifications, such as omitting configurations or replacing them with different configurations, within the scope of the purpose of the present invention.

<Building>
Fig. 1 shows a part of the frame of a building 10. The building 10 is a wooden building to which a "reinforcement structure for a wooden building" according to an embodiment of the present invention is applied. The present invention can be applied to wooden buildings for various purposes, such as houses and public facilities. In addition, the present invention can be applied to both reinforcement of "newly built" buildings and reinforcement of "existing" buildings.

In this embodiment, the building 10 is a wooden building constructed using existing traditional construction methods, and a vibration-damping structure is applied to improve earthquake and storm resistance. In consideration of the historical value of wooden buildings constructed using existing traditional construction methods, it is preferable to reduce construction methods such as drilling and cutting that cause large defects in columns and beams as much as possible.

The building 10 has a wooden frame formed by wooden pillars 12 and wooden beams 14. The pillars 12 are arranged in the vertical direction (Z direction). Beams 14 are joined to the pillars 12. More specifically, at least one of beams 14X along the X direction and beams 14Y along the Y direction is joined to the pillars 12.

The X direction and the Y direction are mutually perpendicular and extend along the lateral (horizontal) direction. Beam 14 is a general term for beams 14X and 14Y. In the following description, beams 14X and 14Y will be referred to as beam 14 unless a distinction needs to be made.

The structural surface along the up-down direction (structural surface along the X direction and Z direction) sandwiched between adjacent columns 12 is called the vertical structural surface 12H, and the structural surface along the horizontal direction (structural surface along the X direction and Y direction) surrounded by adjacent beams 14 is called the horizontal structural surface 14H.

The vertical structural face 12H does not necessarily have to be aligned vertically, and may be tilted or twisted to account for the degree of error that occurs when the column 12 is constructed. Similarly, the horizontal structural face 14H does not necessarily have to be aligned horizontally, and may be tilted or twisted to account for the degree of error that occurs when the beam 14 is constructed.

<Reinforcing member>
The vertical structural face 12H is reinforced by a vertical reinforcing member 20. The horizontal structural face 14H is reinforced by a horizontal reinforcing member 80. In Fig. 1, an example of a portion where the vertical reinforcing member 20 is arranged is shown by hatching.

<Processing of pillars>
In order to reinforce the vertical structural face 12H with the vertical reinforcing member 20, the column 12 is first processed. Specifically, the upper and lower beams 16 spanning the column 12 as shown in Fig. 2(A) are removed as shown in Fig. 2(B). The beams 16 are disposed so as to pass through the through holes 12A of the column 12. Therefore, after the beams 16 are removed, the through holes 12A are exposed in the column 12.

Next, fixing members 12B are inserted into each through hole 12A, and fixing members 12B are fixed to the pillar 12. Fixing members 12B are formed from steel material, and their outer peripheral surface is sized to directly contact the inner peripheral surface of through hole 12A. Alternatively, the outer peripheral surface of fixing member 12B is sized to contact the inner peripheral surface of through hole 12A via a cushioning material or the like. Fixing member 12B is positioned with both ends protruding from pillar 12. Fixing member 12B and pillar 12 are positioned relative to each other by bolting member 12C to the part of fixing member 12B protruding from pillar 12, making it unnecessary to place bolts or the like to attach to the pillar for reinforcement.

Note that member 12C is disposed in recessed corner portion 12E formed by the upper surface (or lower surface) of fixing member 12B and the side surface of pillar 12, but the embodiment of the present invention is not limited to this. For example, as shown in Figures 4(A) and (B), member 12C may be disposed in recessed corner portion 12F formed by the side surface of fixing member 12B and the side surface of pillar 12.

As shown in FIG. 2(C), the fixing member 12B has an insertion hole 12BH for pin connection formed at one end protruding from the column 12. The fixing member 12B is fixed to the column 12 so that this one end (i.e., the insertion hole 12BH) is located at the reinforcing structural surface (the structural surface on which the vertical reinforcing member 20 is arranged). In other words, a pair of fixing members 12B fixed to adjacent columns 12 are arranged so that the ends where the insertion holes 12BH are formed face each other.

<Vertical reinforcement member>
3A shows the configuration of the vertical reinforcement member 20. The vertical reinforcement member 20 is a member that reinforces the vertical structural surface 12H along the up-down direction sandwiched between adjacent columns 12. The vertical reinforcement member 20 is configured to include a first cross member 30, a second cross member 40, and a vibration-damping member 50.

As shown in FIG. 3(B), the vertical reinforcement member 20 is disposed within the wall. Specifically, the vertical reinforcement member 20 is covered with a plate material 60. The plate material 60 is disposed between adjacent columns 12, and the columns 12 are exposed (a so-called "solid wall" structure). The vertical reinforcement member 20 can also be disposed within a wall having a "large wall" structure in which the columns 12 are covered with the plate material 60.

(First cross member)
As shown in Fig. 3(A), the first cross member 30 includes a main body 32, a joint 34, and a plate-like portion 36. The main body 32 is formed of, for example, an H-shaped steel, and extends along the X-direction on the vertical structural face 12H. In addition, a web of the main body 32 is disposed along the Z-direction.

The joints 34 are integral with both ends of the main body 32. An insertion hole 34H is formed in the joints 34. This insertion hole 34H is arranged so as to communicate with the insertion hole 12BH (see FIG. 2(C)) of the fixed member 12B. The first cross member 30 is pin-joined to the fixed member 12B by inserting a steel rod serving as a rotation shaft through the insertion hole 34H and the insertion hole 12BH. That is, both ends (a pair of joints 34) of the first cross member 30 are pin-joined to adjacent columns 12.

The plate-shaped portion 36 is made of a steel plate, and its upper end is integral with the main body portion 32. The plate-shaped portion 36 is attached to the vertical structural plane 12H along the X direction and facing downward in the Z direction. A vibration-damping member 50 is attached to the lower end of the plate-shaped portion 36.

(Second cross member)
The second cross member 40 is disposed below the first cross member 30. The second cross member 40 includes a main body portion 42, a joint portion 44, and a plate-shaped portion 46. The configurations of the main body portion 42 and the joint portion 44 are similar to the configurations of the main body portion 32 and the joint portion 34 in the first cross member 30, and therefore a description thereof will be omitted. In addition, the configuration of the insertion hole 44H in the joint portion 44 is similar to the configuration of the insertion hole 34H, and therefore a description thereof will be omitted.

The plate-shaped portion 46 is formed from a steel plate, and its lower end is welded to the upper flange of the main body portion 42. The plate-shaped portion 46 is attached to the vertical structural plane 12H along the X direction and facing upward in the Z direction. A vibration-damping member 50 is attached to the upper end of the plate-shaped portion 46.

(Vibration Damping Member)
The vibration-damping member 50 includes an upper plate 52, a lower plate 54, and a viscoelastic body 56. The upper plate 52 is disposed along the X direction and the Z direction on the vertical structural plane 12H, and is joined to the plate-like portion 36 of the first cross member 30. Although the joining method is not particularly limited, in this embodiment, the upper plate 52 is joined using a splice plate and a bolt.

Two lower plates 54 are arranged to sandwich the upper plate 52. The two lower plates 54 are arranged along the X and Z directions on the vertical structural face 12H, respectively, and are joined to the plate-shaped portion 46 of the second cross member 40. There are no particular limitations on the joining method, but in this embodiment, they are joined using bolts.

Spacers 58 are disposed between each of the two lower plates 54 and the plate-shaped portion 46. These spacers 58 form gaps between the upper plate 52 and the two lower plates 54.

A plate-shaped viscoelastic body 56 is disposed in the gap between the upper plate 52 and the lower plate 54. Both sides of the viscoelastic body 56 are bonded to the upper plate 52 and the lower plate 54, respectively. Therefore, when the upper plate 52 and the lower plate 54 are displaced relative to each other in the plane along the X direction and the Z direction, the viscoelastic body 56 undergoes shear deformation.

<Horizontal reinforcement member>
As shown in Fig. 1, the horizontal reinforcement member 80 includes, as an example, a fire beam 82 that reinforces the horizontal surface. The fire beam 82 reinforces the horizontal structural surface 14H surrounded by the beams 14X and 14Y. The fire beam 82 is also disposed inside the floor finishing material and the ceiling finishing material of the building 10.

Specifically, the fire beams 82 are arranged at the four corners of the rectangular horizontal structural surface 14H formed by two adjacent beams 14X and two adjacent beams 14Y. At each corner, the fire beams 82 are arranged in a direction that intersects with both the beams 14X and 14Y. In addition, both ends of the fire beams 82 are joined to the beams 14X and 14Y, respectively.

The fire beams 82 are arranged on two horizontal structural members 14H that are adjacent to each other vertically. The vertical structural member 12H between these two horizontal structural members 14H is reinforced by the vertical reinforcing members 20. In other words, the fire beams 82 reinforce the horizontal structural member 14H that is surrounded by the beams 14X that are joined above and below the columns 12 (the columns that form the vertical structural member 12H reinforced by the vertical reinforcing members 20).

The horizontal reinforcement member 80 placed on the horizontal structural surface 14H is not limited to the fire beam 82. For example, a horizontal brace (not shown) may be placed on the horizontal structural surface 14H as the horizontal reinforcement member 80. Also, a surface material such as structural plywood may be placed as the horizontal reinforcement member 80.

<Action and Effects>
In the reinforcement structure for a wooden building according to this embodiment, as shown in FIG. 3A, a first horizontal member 30 and a second horizontal member 40 are spanned above and below adjacent columns 12. A vibration-damping member 50 is attached to the first horizontal member 30 and the second horizontal member 40. When the vertical structural surface 12H sandwiched between the columns 12 deforms during an earthquake, the vibration-damping member 50 deforms. At this time, the vibration-damping member 50 may deform significantly, and a large force may act on the first horizontal member 30 and the second horizontal member 40. Even in such a case, the first horizontal member 30 and the second horizontal member 40 are made of steel, and therefore are unlikely to be damaged. This allows the vibration-damping member 50 to fully demonstrate vibration-damping performance.

As shown in the schematic diagram of FIG. 5(A), the first cross member 30 and the second cross member 40 are pin-jointed (pin joints are shown by white circles) to the column 12 (fixing member 12B fixed to the column 12). Therefore, as shown in FIG. 5(B), the first cross member 30 and the second cross member 40 are easily deformed, and deformation of the vertical structural surface 12H sandwiched between the columns 12 is easily transmitted to the vibration-damping member 50. This makes it possible to efficiently utilize the vibration-damping performance of the vibration-damping member 50.

Furthermore, because the first cross member 30 and the second cross member 40 are pin-joined to the column 12, the stress generated in the first cross member 30 and the second cross member 40 is not easily transmitted to the column. In other words, as shown in the moment diagram of FIG. 5(C), the moment is not easily transmitted between the first cross member 30 and the second cross member 40 and the column 12. This suppresses damage to the column.

The schematic diagram of FIG. 6(A) shows the first cross member 300 and the second cross member 400. The first cross member 300 and the second cross member 400 are rigidly connected to the column 12 (rigidly connected parts are shown with black circles). For this reason, as shown in FIG. 6(B), the first cross member 300 and the second cross member 400 are less likely to deform than the first cross member 30 and the second cross member 40 shown in FIG. 5(B), and deformation of the vertical structural surface sandwiched between the columns 12 is less likely to be transmitted to the vibration-damping member 50. This makes it difficult to efficiently utilize the vibration-damping performance of the vibration-damping member 50.

In addition, by rigidly connecting the first cross member 300 and the second cross member 400 to the column 12, as shown in the moment diagram of FIG. 6(C), moments are easily transmitted between the first cross member 300 and the second cross member 400 and the column 12. This may make the column 12 more susceptible to damage.

In this way, the embodiment in which the first cross member 300 and the second cross member 400 are rigidly joined to the column 12 is included in the embodiments of the present invention. Even if they are rigidly joined, the effect of the vertical reinforcement member 20 can be effectively exerted due to the effect of the horizontal reinforcement member 80 described below.

In addition, in the reinforcement structure of the wooden building according to this embodiment, as shown in FIG. 3(B), the vertical reinforcement members 20 (first cross member 30, second cross member 40, and vibration-damping member 50, see FIG. 3(A)) are arranged inside the wall (sandwiched between the plate members 60). Therefore, the vertical reinforcement members 20 are difficult to see from the outside. Therefore, the building 10 can be reinforced without compromising the design of the building 10.

In addition, in the reinforcement structure of the wooden building according to this embodiment, as shown in FIG. 1, the structural surface (vertical structural surface 12H) along the up-down direction sandwiched between the columns 12 is reinforced by vertical reinforcement members 20, and further, the structural surface (horizontal structural surface 14H) along the lateral direction surrounded by the beams 14X joined to the columns 12 is reinforced by horizontal reinforcement members 80 (flash beams 82).

As a result, as shown in FIG. 7(A), even if a horizontal force P acts on the building 10 during an earthquake, the horizontal structural plane 14H is less likely to deform (deformation such as bending out of plane or twisting). As a result, the seismic force is more likely to act on the vertical structural plane 12H sandwiched between the columns 12. This makes it easier for the vertical reinforcement members 20 to exert their effects effectively. Note that in FIG. 7(A), the vertical reinforcement members 20 on the vertical structural plane 12H have been omitted to simplify the illustration.

In contrast, the horizontal structural surface 140H in the comparative example shown in FIG. 7(B) does not have a horizontal reinforcement member. Therefore, when a horizontal force P acts on the building 10 during an earthquake, the horizontal structural surface 140H is more likely to deform out of plane than the horizontal structural surface 14H that is reinforced by the horizontal reinforcement member 80. As a result, the force is less likely to be transmitted to the vertical structural surface 12H sandwiched between the columns 12. In this case, it is difficult to effectively utilize the effect of the vertical reinforcement member 20.

In addition, in the reinforcement structure for a wooden building according to this embodiment, as shown in FIG. 1, the horizontal structural surfaces 14H "above and below" the vertical structural surface 12H reinforced by the vertical reinforcement member 20 are reinforced by horizontal reinforcement members 80 (flash beams 82).

As a result, earthquake forces are more likely to act on the vertical structural plane 12H than when one of the horizontal structural planes 14H is not reinforced by the horizontal reinforcement member 80. This allows the effect of the vertical reinforcement member 20 reinforcing the vertical structural plane 12H to be more effectively exerted.

In this embodiment, the first cross member 30 includes the main body portion 32, the joint portion 34, and the plate-like portion 36, but the embodiment of the present invention is not limited to this. For example, like a first cross member 62 shown in Fig. 8, the portions corresponding to the main body portion 32, the joint portion 34, and the plate-like portion 36 in the first cross member 30 may be integrally formed. In other words, they may be formed of a single plate.
By forming the first cross member in this manner, the structure of the first cross member 62 can be simplified. The thickness of the first cross member 62 is appropriately set according to the required strength. In addition, ribs can be appropriately used for reinforcement as necessary.

Similarly, the second cross member 40 can be replaced with a second cross member 64. The configuration of the second cross member 64 is similar to that of the first cross member 62, so a description thereof is omitted.

In addition, in this embodiment, the horizontal structural members 14H above and below the vertical structural member 12H reinforced by the vertical reinforcement member 20 are reinforced by the horizontal reinforcement member 80, but the embodiment of the present invention is not limited to this.

For example, at least one of the horizontal structural surface 14H "above" and the horizontal structural surface 14H "below" the vertical structural surface 12H reinforced by the vertical reinforcement member 20 may be reinforced by the horizontal reinforcement member 80. This configuration also makes it easier for the vertical structural surface 12H to deform, making it easier to effectively exert the effects of the vertical reinforcement member 20.

[Second embodiment]
Hereinafter, a reinforcement structure for a wooden building according to the second embodiment of the present invention will be described with reference to the drawings. The differences from the first embodiment will be mainly described, and the description of the configuration and effects common to the first embodiment will be omitted.

In the first embodiment, as shown in Figures 2(A) to (C), the crosspiece 16 is removed from the pillar 12, and the fixing member 12B is inserted into the through hole 12A that is formed after the removal. On the other hand, the second embodiment is an embodiment that is applied when there is no removable crosspiece.

In the reinforcement structure for a wooden building according to the second embodiment, a vertical frame member 12G is used instead of the fixing member 12B of the first embodiment, as shown in FIG. 9(A). The vertical frame member 12G is formed using a steel rod and is arranged along the column 12.

The vertical frame member 12G is fixed to the pillar 12 via a through bolt. In addition, a spacer S, made of, for example, a metal, is placed between the vertical frame member 12G and the pillar 12, so that the vertical frame member 12G and the pillar 12 are not in direct contact.

The member for fixing the vertical frame member 12G to the pillar 12 is not limited to a through bolt, and a non-through lag screw bolt may be used. Alternatively, the vertical frame member 12G may be fixed to the pillar 12 by wrapping a fiber sheet or the like around the vertical frame member 12G and the pillar 12.

As shown in FIG. 9B, the upper and lower ends of the vertical frame member 12G are provided with insertion holes 12GH for pin connection. In the second embodiment, the vertical reinforcing member 70 (horizontal frame member 72A, described later) is pin-fixed to the vertical frame member 12G, which is fixed to the pillar 12.

As shown in FIG. 9(A), the vertical reinforcement member 70 is a member that reinforces the vertical structural surface 12H along the up-down direction sandwiched between adjacent columns 12. This vertical reinforcement member 70 is composed of a first cross member 72, a second cross member 74, and a vibration-damping member 76.

The first horizontal member 72 comprises a horizontal frame member 72A and a plate-shaped portion 72B. The horizontal frame member 72A, like the vertical frame member 12G, is formed using square steel pipes, channel members, H-shaped steel, etc., and is arranged along the beam 14.

The horizontal frame member 72A and the beam 14 are disposed at a distance from each other. The distance between the horizontal frame member 72A and the beam 14 is not particularly limited. In addition, a plate material or the like that covers the vertical reinforcement member 70 may be interposed between the horizontal frame member 72A and the beam 14.

As shown in FIG. 9(B), an insertion hole 72GH for pin connection is formed at both ends (left and right ends, only one end is shown in FIG. 9(B)) of the horizontal frame member 72A. This insertion hole 72GH is positioned so as to communicate with the insertion hole 12GH (insertion hole 12GH at the upper end) of the vertical frame member 12G.

The vertical frame member 12G and the horizontal frame member 72A are of the same thickness, and a notch half the thickness is formed in the center of the upper and lower ends of the vertical frame member 12G. Meanwhile, a protrusion half the thickness is formed in the center of both ends of the horizontal frame member 72A. When assembling the vertical frame member 12G and the horizontal frame member 72A, these notches and protrusions are engaged.

Then, by inserting a steel rod through the insertion hole 72GH and the insertion hole 12GH, the first cross member 72 shown in FIG. 9(A) is pin-joined to the vertical frame member 12G. In other words, both ends of the first cross member 72 are pin-joined to the adjacent columns 12.

The configuration of the plate-shaped portion 72B is similar to that of the plate-shaped portion 36 of the first cross member 30 in the first embodiment, and a description thereof will be omitted.

The second cross member 74 is installed below the first cross member 72 and is pin-joined to the lower end of the vertical frame member 12G. The second cross member 74 has a horizontal frame member 74A and a plate-shaped portion 74B. The configuration of the horizontal frame member 74A and the plate-shaped portion 74B is the same as the horizontal frame member 72A and the plate-shaped portion 72B of the first cross member 72, and therefore a description thereof will be omitted.

The vibration-damping member 76 includes an upper plate 76A, a lower plate 76B, and a viscoelastic body 76C. The configurations of the upper plate 76A, the lower plate 76B, and the viscoelastic body 76C are similar to the configurations of the upper plate 52, the lower plate 54, and the viscoelastic body 56 in the vibration-damping member 50 of the first embodiment (see Figures 3(A) and (C)), and detailed explanations will be omitted.

Note that, while two viscoelastic bodies 56 in the vibration-damping member 50 are provided along the in-plane direction of the vertical structural surface 12H, only one viscoelastic body 76C in the vibration-damping member 76 is provided along the in-plane direction of the vertical structural surface 12H. In this way, the number of viscoelastic bodies (in other words, the area along the in-plane direction of the vertical structural surface 12H) is not particularly limited.

As described above, in the reinforcement structure for a wooden building according to the second embodiment, the vertical frame member 12G fixed to the pillar 12 and the horizontal frame members 72A and 74A forming the vertical reinforcement member 70 form a rectangular frame body between adjacent pillars 12. The vertical frame member 12G and the horizontal frame member 72A are pin-jointed, and the vertical frame member 12G and the horizontal frame member 74A are pin-jointed.

With this configuration, the reinforcement structure for a wooden building according to the second embodiment can achieve the same effect as the reinforcement structure for a wooden building according to the first embodiment. In addition, since the horizontal frame member 74A can be positioned away from the beam 14, the position of the vertical reinforcement member 70 can be freely selected. This makes it highly versatile.

The vertical reinforcement member 70 according to the second embodiment can be used in combination with the horizontal reinforcement member 80 described in the first embodiment. As described above, the present invention can be implemented in various ways.

12 Column 14X Beam 20 Vertical reinforcement member 30 First horizontal member 40 Second horizontal member 50 Vibration control member 80 Horizontal reinforcement member 82 Fire beam (horizontal reinforcement member)

Claims (3)

A vertical reinforcement member that is sandwiched between adjacent wooden columns and that reinforces the structural surface along the vertical direction with vibration damping;
A horizontal reinforcing member is joined to the wooden beam joined to the column, and is a structural surface along a horizontal direction surrounded by the beam, and provides seismic reinforcement to each of two structural surfaces adjacent to each other with the beam in between;
Equipped with
The horizontal reinforcing member reinforces the structural surface along the horizontal direction surrounded by each beam joined above and below the column.
Reinforcement structure for wooden buildings. The reinforcement structure for a wooden building according to claim 1, wherein the horizontal reinforcement members are fire beams arranged at the four corners of the structural surface. The vertical reinforcement member is
A fixing member is inserted and fixed into through holes formed at two locations, above and below, of a wooden column-beam frame, and has an end protruding into the frame;
A first cross member made of steel, both ends of which are pin-joined to the upper fixing members of the adjacent columns using steel rods as rotation axes ;
A second cross member made of steel, both ends of which are pin-joined to the lower fixing members of the adjacent columns using steel rods as rotation axes ;
A vibration-damping member attached to the first cross member and the second cross member;
The reinforcing structure for a wooden building according to claim 1 or 2, comprising: