JP6986389B2 - Vibration control building with fail-safe mechanism - Google Patents

Description

The present invention relates to a vibration damping building with a fail-safe mechanism for a soft vibration damping building (soft first story building) in which a vibration damping device is installed between an upper structure and a lower structure.

In order to improve the seismic performance and vibration control performance of a building, for example, various seismic isolation structures and vibration control structures with seismic isolation devices and vibration control devices installed between the lower structure and the superstructure of the building have been proposed. There is. However, in such a configuration, if a seismic load exceeding an assumption is applied, the seismic isolation device and the vibration control device may be damaged and the seismic isolation performance may not be exhibited.
On the other hand, in Patent Document 1, the vibration damping device having a damper member that attenuates the relative displacement in the horizontal direction between the lower structure and the upper structure has a vibration damping device in which the lower structure and the upper structure have dimensions larger than predetermined in the horizontal direction. A configuration including a displacement suppressing member that suppresses a relative displacement is disclosed. In this configuration, the displacement suppressing member has a rod-shaped member provided on one of the lower structure and the upper structure, and a cylindrical member provided on the other of the lower structure and the upper structure.
In the configuration disclosed in Patent Document 1, when a large-scale earthquake that is expected to occur or a megathrust earthquake that exceeds the assumption occurs, the rod-shaped member or the tubular member is plastically deformed and displaced. The suppression effect cannot be obtained, and there is a possibility that the building will collapse or be damaged.

Further, for example, in Patent Document 2, as a fail-safe mechanism for regulating the relative displacement of the superstructure with respect to the substructure of the building, the superstructure is provided when the relative displacement of the superstructure with respect to the substructure is excessively large. A configuration is disclosed that includes a displacement regulating main body portion that regulates the relative displacement of the superstructure by hitting the contact portion.
On the other hand, even in the configuration disclosed in Patent Document 2, if a large-scale earthquake that is expected to occur or a mega-thrust earthquake that exceeds the assumption occurs, the displacement regulation main body will be plastically deformed. , The displacement regulation effect cannot be obtained, and there is a possibility that the building will collapse or be damaged.

Further, in Patent Document 3, in order to prevent excessive deformation of the superstructure provided above the seismic isolation layer of the building in the horizontal direction, the superstructure is located at a position horizontally separated from the superstructure. A configuration is disclosed that includes an out-trigger frame for restricting the horizontal movement of the.
In the configuration disclosed in Patent Document 3, an outrigger frame must be provided separately from the building, which is a very large-scale configuration and requires a space for providing the outrigger frame. Therefore, it is often difficult in reality to provide such an outrigger frame.

Japanese Unexamined Patent Publication No. 2015-55293 Japanese Unexamined Patent Publication No. 2015-183495 Japanese Unexamined Patent Publication No. 2015-31098

The problem to be solved by the present invention is versatility that can suppress the collapse and collapse of buildings and protect human lives even in the event of the largest possible earthquake or a huge earthquake that exceeds expectations. To provide a damping building with a fail-safe mechanism with a high fail-safe system.

As a fail-safe mechanism of a soft vibration damping building (soft first story building) in which a vibration damping device is installed between the upper structure and the lower structure, the present inventors, when a huge displacement acts, the lower part. By geometrically abutting the damper mounting portion attached to the brace joined to the structure and the locking portion attached to the superstructure, between the superstructure and the substructure, By forming a shear resistance member consisting of a locking part, a damper mounting part, and a brace, a part of the flexible vibration control building is changed to a seismic structure, which suppresses the huge displacement that occurs in the superstructure. Focusing on what can be done, the present invention was reached.
The present invention employs the following means in order to solve the above problems.
That is, the vibration damping building with a fail-safe mechanism of the present invention is a vibration-damping building with a fail-safe mechanism in which a vibration damping device is installed between the upper structure and the lower structure of the building. The lower part includes a brace attached to the lower structure, a vibration damping device mounting portion attached to the brace, a vibration damping device, and a locking portion attached to the upper structure. When the relative displacement of the superstructure with respect to the structure exceeds the relative displacement amount within a preset allowable range, a part of the vibration damping device mounting portion abuts on the locking portion of the superstructure. The brace suppresses the relative displacement.
Specifically, for example, the vibration damping device is installed in the centralized vibration damping layer between the upper structure and the lower structure, and the brace constituting the fail-safe mechanism is installed in the upper part of the lower structure. It is installed in the lower structure so that it is located in the beam structure that constitutes the vibration layer, and the locking part is located in the beam structure that constitutes the centralized vibration damping layer that is installed in the lower part of the upper structure. It is installed in the superstructure so that it does.
According to such a configuration, when a horizontal displacement occurs in the upper structure at the time of an earthquake, a brace attached to the lower structure and a vibration damping device provided via a vibration damping device mounting portion attached to the brace. As a result, the seismic energy acting on the building is absorbed and the displacement is suppressed. Therefore, when the relative displacement of the upper structure with respect to the lower structure is smaller than the relative displacement amount within the preset allowable range, the horizontal displacement generated in the upper structure is absorbed by the damping force of the vibration damping device, and the lower structure is used. The relative displacement between the body and the superstructure is reduced. However, when the relative displacement of the upper structure with respect to the lower structure exceeds the relative displacement amount within the preset allowable range, a part of the vibration damping device mounting portion abuts on the locking portion and the relative displacement of the upper structure. Is suppressed by the brace. This is a highly versatile fail-safe system that can prevent the collapse and collapse of buildings and protect human lives even in the event of the largest possible earthquake or a huge earthquake that exceeds expectations. A vibration-damping building with a fail-safe mechanism can be provided.

In one aspect of the present invention, in the vibration damping building with a fail-safe mechanism of the present invention, the out-of-plane movement restraint is performed so as to sandwich a hanging steel plate projecting downward from the superstructure in the vibration damping device mounting portion. The material is installed.
Specifically, for example, the suspended steel plate is installed so as to project downward from the superstructure including the beam member of the column-beam frame constituting the centralized vibration damping layer.
According to such a configuration, in addition to the above-mentioned effects, in a structure provided with a brace between the upper structure and the lower structure, the column beam frame of the structure is provided via the brace. When the vibration damping device mounting portion tries to move in the out-of-plane direction, the out-of-plane movement restraining material interferes with the hanging steel plate, and the movement in the out-of-plane direction is restricted. As a result, it is possible to suppress excessive deformation of the vibration damping device mounting portion in the out-of-plane direction. Therefore, it is possible to improve the structural safety performance of the building against the seismic load.

In one aspect of the present invention, in the vibration damping building with a fail-safe mechanism of the present invention, an intermediate beam member is erected in the intermediate portion in the height direction of the brace in a direction intersecting the brace, and the brace is installed. An out-of-plane steady rest portion for restraining the out-of-plane displacement of the brace is installed between the intermediate beam member and the intermediate beam member.
According to such a configuration, in addition to the above-mentioned action and effect, the displacement of the brace in the out-of-plane direction is restrained by the out-of-plane steady rest portion provided between the brace and the intermediate beam member intersecting with the brace. As a result, excessive deformation of the brace in the out-of-plane direction can be suppressed. Therefore, it is possible to improve the structural safety performance of the building against the seismic load.

According to the present invention, a fail-safe system with high versatility that can suppress the collapse and collapse of buildings and protect human lives even in the event of the largest possible earthquake or a huge earthquake that exceeds expectations. We can provide a vibration control building with a fail-safe mechanism.

It is a vertical sectional view which shows the structure of the vibration damping building of embodiment of this invention. It is a plan sectional view which shows the structure of the centralized vibration damping layer in the vibration damping building of FIG. It is a front view which shows the structure of the vibration damping mechanism provided in the column beam frame of a centralized vibration damping layer. It is a partially enlarged view which shows the structure of the main part of the vibration damping mechanism of FIG. It is a top view which shows the mechanism which allows the horizontal relative displacement of a damper bracket provided between the damper bracket which constitutes a vibration damping mechanism, and a pillar. FIG. 6 is a cross-sectional view taken along the line AA of FIG. 4 showing the configuration of an out-of-plane movement restraining material provided in the vibration damping mechanism. The configuration of the out-of-plane steady rest portion provided in the vibration damping mechanism is shown, (a) is a partially enlarged front view, (b) is a sectional view taken along the line FF of (a), and (c) is (a). FIG. 5 is a cross-sectional view taken along the line of an arrow. It is a figure which shows the structure of the out-of-plane steady rest part, and is the cross-sectional view taken along the line BB in FIG. The configuration of the modified example of the out-of-plane steady rest portion provided in the vibration damping mechanism is shown. FIG. It is a cross-sectional view taken along the line JJ of a). It is a figure which shows the structure of the modification of the modification of the out-of-plane steady rest part, and is the cross-sectional view taken along the line CC in FIG. It is a front view which shows the structure of the modification of the vibration damping mechanism provided in the column beam frame of a centralized vibration damping layer.

The present invention is a vibration damping building with a fail-safe mechanism against a huge earthquake that exceeds expectations, and when the relative displacement of the superstructure with respect to the substructure exceeds the relative displacement amount within the preset allowable range, the substructure The main brace is placed between the upper structure and the lower structure by partially contacting the vibration damping device mounting part attached to the brace joined to the upper structure and the locking part joined to the upper structure. It is formed as a shear resistance member, and a part of the flexible vibration control building is changed to a seismic structure to suppress the relative displacement of the superstructure.
In the embodiment of the present invention, the out-of-plane movement restraining material of the vibration damping device mounting portion installed on the upper part of the brace of the lower structure and the suspended steel plate attached to the upper structure are partially brought into contact with each other to form a lower portion. It is a vibration damping building with a fail-safe mechanism that forms a shear resistance member between the structure and the superstructure (FIGS. 1 to 6). Further, in the above embodiment, for the brace of the lower structure, an intermediate beam member is installed at an intermediate height position of the brace, and an out-of-plane steady rest portion is provided between the brace and the intermediate beam member. , It is a vibration control building with a fail-safe mechanism that restrains the out-of-plane movement of the brace (Figs. 7 and 8). A modified example of this out-of-plane steady rest portion will be described with reference to FIGS. 9 and 10. Further, as another modification, the brace arrangement form provided between the lower structure and the upper structure is provided in an inverted V shape in the embodiment, but the difference is that the brace is arranged in a V shape. The vibration building will be described (Fig. 11).
Hereinafter, a mode for implementing the vibration control building with a fail-safe mechanism according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a vertical sectional view showing the configuration of the vibration damping building according to the embodiment of the present invention. In the vibration damping building of FIG. 1, a plan sectional view showing the configuration of the centralized vibration damping layer is shown in FIG.
As shown in FIG. 1, the vibration damping building (vibration damping building with a fail-safe mechanism) 1 includes a lower structure 10, an upper structure 20, and a centralized vibration damping layer 30.
The substructure 10 is supported on a foundation pile (not shown) constructed in the ground G. The substructure 10 includes a plurality of lower columns 11 made of steel-framed reinforced concrete (SRC), and lower beams 12 erected between the adjacent lower columns 11.
The upper structure 20 is provided on the lower structure 10 via a centralized vibration damping layer 30. The superstructure 20 has a plurality of floors in the vertical direction. The superstructure 20 is a brace structure including a plurality of columns 21, a beam 22 erected between columns 21 adjacent to each other, and a brace 23 provided between the columns 21 and the beam 22. be. The column 21 of the superstructure 20 is made of, for example, a concrete-filled steel pipe (CFT), and the beam 22 and the brace 23 are made of steel.

The centralized vibration damping layer 30 is provided, for example, from the first floor to the third floor above the ground. As shown in FIGS. 1 and 2, the centralized vibration damping layer 30 has a rigid frame structure including columns 31 and beams 32. The pillar 31 is a long pillar that is continuous with the lower pillar 11 of the lower structure 10 and the pillar 21 of the upper structure 20 and spans a plurality of floors. The beam 32 is provided only with the beam 32A provided at the uppermost part of the centralized vibration damping layer 30 and the beam 32B provided at the lowermost part, and is provided on the middle floor (the second and third floors above the ground in the example of FIG. 1). Is not provided. As a result, the centralized vibration damping layer 30 has a flexible structure with low rigidity, as opposed to the rigid upper structure 20 having a brace structure having high rigidity.
In such a vibration damping building 1, a floor is formed on each floor by providing, for example, a steel frame beam and a deck plate (all not shown) on the lower beams 12, 22 and 32.

FIG. 3 shows a front view showing the configuration of the vibration damping mechanism provided in the column-beam frame of the centralized vibration damping layer. FIG. 4 shows a partially enlarged view showing the configuration of the main part of the vibration damping mechanism of FIG.
As shown in FIG. 3, the centralized vibration damping layer 30 is a front view formed by columns 31, 31 adjacent to each other and beams 32A, 32B provided at the uppermost and lowermost portions of the centralized vibration damping layer 30. A vibration damping mechanism (fail-safe mechanism) 40 is provided in the rectangular beam-column frame 33. The vibration damping mechanism 40 includes braces 41, 41, a damper mounting portion (vibration damping device mounting portion) 42, a damper (vibration damping device) 43, a locking portion 44, an out-of-plane movement restraining material 50, and out-of-plane. It is provided with a steady rest portion 60.
The braces 41 and 41 are provided in the structure (vertical surface) where the columns 31 and the beams 32 constituting the column-beam frame 33 are located. The braces 41, 41 are provided in an inverted V shape, for example, and extend continuously over a plurality of layers in the vertical direction of the centralized vibration damping layer 30. Each brace 41 is made of a steel frame, and its lower end portion 41a is attached to the lower structure 10 via the beam 32B by being connected to the column 31 and the beam 32B located below the beam-column frame 33. .. The upper end portions 41b, 41b of these two braces 41, 41 are connected to the damper mounting portion 42.
As shown in FIG. 4, the damper mounting portion 42 has a block-shaped main body portion 42a and a brace connection portion 42b extending downward from the central portion of the main body portion 42a and to which the upper end portion 41b of the brace 41 is connected. It has one. Plate-shaped receiving members 42c are integrally provided at both ends of the main body portion 42a in the horizontal direction so as to extend in a direction orthogonal to the central axial direction D of the beam 32. In this way, the damper mounting portion 42 connected to the upper end portion 41b of the brace 41 is not directly joined to the beam 32A above the damper mounting portion 42, and the edge is cut off. When an earthquake occurs, when the upper beam 32A and the lower beam 32B constituting the column-beam frame 33 are displaced relative to each other along the central axial direction D, the upper end portion 41b of the brace 41 is displaced integrally with the lower beam 32B. The damper mounting portion 42 joined to the above beam 32A is displaced along the central axial direction D.

A plurality of rows, for example, two dampers 43 are arranged in the vertical direction on both sides of the damper mounting portion 42. In the column-beam frame 33, damper brackets 45 are provided on both sides of the damper mounting portion 42 at intervals along the central axial direction D of the beam 32. Each damper bracket 45 is provided so as to project downward from the upper beam 32A of the column-beam frame 33, and has a receiving member 45c on the side of the damper mounting portion 42 facing the receiving member 42c. The damper 43 is made of, for example, a hydraulic cylinder or the like, and both ends thereof are connected to a receiving member 42c of the damper mounting portion 42 and a receiving member 45c of the damper bracket 45. The damper 43 reduces the relative displacement of the damper mounting portion 42 joined to the upper end portion 41b of the brace 41 and the damper bracket 45 provided on the upper beam 32A along the central axial direction D of the beam 32. ..

FIG. 5 shows a cross-sectional view taken along the line EE of FIG. 4 showing a mechanism provided between the damper bracket constituting the vibration damping mechanism and the pillar to allow the relative displacement of the damper bracket in the horizontal direction.
Here, as shown in FIG. 5, in the damper bracket 45, a plate 46 projecting along the central axial direction D of the beam 32 is provided on the side of the damper bracket 45 facing the side surface 31s. Further, on the side surface 31s of the pillar 31, a plate 36 projecting toward the damper bracket 45 side along the central axial direction D of the beam 32 is provided along the plate 46. A plurality of elongated holes 36h, 46h continuous in the central axial direction D of the beam 32 are formed in these plates 36, 46 at intervals in the vertical direction. Further, the plate 36 is provided with, for example, a stainless steel sheet 37 on the side facing the plate 46, and the plate 46 is provided with a stainless steel sheet 47 and Teflon (registered trademark) at positions facing the sheet 37. ) Is provided with a low friction material 48. The plate 46 on the damper bracket 45 side and the plate 36 on the pillar 31 side are fastened by bolts and nuts 49 in the elongated holes 36h and 46h, and are within the length of the central axial direction D of the elongated holes 36h and 46h. It is connected so as to be relatively movable along the central axis direction D.

As shown in FIG. 3, the locking portions 44 are provided on both sides of the beam 32 in the central axial direction D at predetermined intervals with respect to the damper mounting portion 42. The locking portion 44 is attached to the superstructure 20 via the beam 32A by being welded to the lower surface of the beam 32 so as to project downward from the lower surface of the beam 32 above the column-beam frame 33. There is. As shown in FIG. 4, the locking portion 44 has a facing surface 44f facing the receiving member 42c of the damper mounting portion 42 at a distance along the central axial direction D. In such a locking portion 44, when an earthquake occurs, the upper beam 32A and the lower beam 32B constituting the column-beam frame 33 are relatively displaced along the central axial direction D, and the damper mounting portion 42 is in the central axial direction. When the relative displacement amount of D is excessively increased, a part of the upper part of the receiving member 42c of the damper mounting portion 42 comes into contact with the damper mounting portion 42.

In the vibration damping building 1 provided with such a vibration damping mechanism 40, when a relative displacement occurs in the upper structure 20 with respect to the lower structure 10 at the time of an earthquake, the upper beam 32A constituting the column-beam structure 33 becomes. It is displaced integrally with the upper structure 20, and the lower beam 32B is displaced integrally with the lower structure 10. Then, a relative displacement occurs between the braces 41, 41 and the damper mounting portion 42 provided on the lower beam 32B and the damper bracket 45 provided on the upper beam 32A. When the relative displacement of the upper structure 20 with respect to the lower structure 10 is smaller than the relative displacement amount within the allowable range set in advance, the damper mounting portion 42 and the damper bracket provided on the beam 32A above the column-beam frame 33. The relative displacement with respect to 45 is reduced by the damper 43. As a result, the vibration damping mechanism 40 functions as a so-called vibration damping structure.
Further, when the relative displacement of the upper structure 20 with respect to the lower structure 10 exceeds the relative displacement amount within the allowable range set in advance, a part of the damper mounting portion 42 comes into contact with the locking portion 44. Then, the relative displacement of the upper beam 32A and the lower beam 32B constituting the column-beam structure 33 along the central axial direction D, that is, the relative displacement of the upper structure 20 with respect to the lower structure 10 is the lower structure 10. It is suppressed by the integrated braces 41, 41. In this way, when the relative displacement of the upper structure 20 with respect to the lower structure 10 exceeds the relative displacement amount within the preset allowable range, the brace 41 shears the relative displacement of the upper structure 20 with respect to the lower structure 10. By being formed as a member, a part of the flexible vibration damping structure is changed to a seismic structure, and deformation of the substructure is suppressed.

Specifically, in the embodiment, as shown in FIGS. 3 and 4, the horizontal distance d between the locking portion 44 and the damper mounting portion (vibration damping device mounting portion) 42, and the lower structure and the upper portion. Interlayer deformation angle R = d / h between the effective floor height h of the centralized vibration damping layer from the upper surface of the lower structure sandwiching the brace installed between the structure and the lower surface of the upper structure is acceptable. When the deformation angle exceeds 1/75, the horizontal distance d between the locking portion and the damper mounting portion becomes zero, and the contact portion is brought into contact with the locking portion. Therefore, when the locking portion and the damper mounting portion come into contact with each other, the horizontal load acting on the superstructure passes through the beam 32A located at the lower end of the superstructure, and the brace passes through the locking portion 44 and the damper mounting portion 42. It will flow to 41 and be transmitted to the substructure 10. The allowable deformation angle is a determination value set by the shape of the building, the horizontal rigidity of the upper and lower floors of the building sandwiching the centralized vibration damping layer, the shear strength, and the like.

FIG. 6 shows a cross-sectional view taken along the line AA of FIG. 4, showing the configuration of the out-of-plane movement restraining material provided in the vibration damping mechanism.
As shown in FIG. 3, the out-of-plane movement restraint members 50 are installed on the upper surface of the damper mounting portion 42 at two locations spaced apart from each other in the central axial direction D of the beam 32. As shown in FIGS. 4 and 6, on the lower surface of the upper beam 32A constituting the column-beam frame 33, a hanging steel plate 35 is provided at a position facing the out-of-plane movement restraint member 50. The vertical steel plate 35 is provided so as to project downward from the superstructure 20. More specifically, it projects vertically downward from the lower surface of the beam 32A and is provided with a constant length along the central axial direction D of the beam 32. The out-of-plane movement restraining material 50 has a pair of restraining members 51, 51. These restraint members 51, 51 are arranged so as to sandwich the suspended steel plate 35 from both sides in the horizontal direction orthogonal to the central axial direction D of the beam 32. Each restraint member 51 is joined to the upper surface of the damper mounting portion 42 by a bolt 55.

The restraining member 51 is provided with a sheet material 52 made of, for example, stainless steel at a position facing the suspended steel plate 35, and a low friction material 53 such as Teflon (registered trademark) is provided on the surface of the sheet material 52. ing. A slide sheet 34 made of, for example, stainless steel is provided on both sides of the vertical steel plate 35 so as to face the low friction material 53 provided on each restraint member 51. The slide sheet 34 is provided in a strip shape so as to extend along the central axial direction D of the beam 32. In such an out-of-plane movement restraining material 50, the pair of restraining members 51, 51 are located on both sides of the hanging steel plate 35 provided on the beam 32, so that the direction intersects the central axial direction D of the beam 32, that is, It restrains the displacement of the structural surface of the column-beam frame 33 in the out-of-plane direction. Further, the out-of-plane movement restraining material 50 allows the damper mounting portion 42 to be displaced in the central axial direction D of the beam 32 with respect to the beam 32 of the column-beam frame 33. At this time, the low friction material 53 provided on the restraint member 51 is in sliding contact with the slide sheet 34 provided on the vertical steel plate 35, thereby suppressing the frictional resistance of the damper mounting portion 42 in the central axial direction D. ing.

By the way, as shown in FIG. 3, in the centralized vibration damping layer 30, in the portion where the intermediate floors (for example, the second floor and the third floor) are provided, the floor slabs of each floor are supported between the columns 31 and 31 adjacent to each other. An intermediate beam member 39 is provided. The intermediate beam member 39 intersects the braces 41 and 41 at the intermediate portion in the height direction of the braces 41 and 41 and extends in parallel with the beam 32. Both ends of each intermediate beam member 39 are pin-joined to the columns 31, 31. Further, the intermediate beam members 39 are arranged with respect to each brace 41 at intervals in the horizontal direction orthogonal to the central axis direction D of the beam 32.
FIG. 7A is a partially enlarged front view showing the configuration of the out-of-plane steady rest portion provided in the vibration damping mechanism. 7 (b) is a cross-sectional view taken along the line FF of FIG. 7 (a), and FIG. 7 (c) is a cross-sectional view taken along the line HF of FIG. 7 (a). It is a figure which shows the structure of the out-of-plane steady rest part, and the cross-sectional view taken along the line BB in FIG. 7A is shown in FIG.
As shown in FIGS. 7 and 8, the out-of-plane steady rest portion 60 is provided between the brace 41 and the intermediate beam member 39 with respect to the structure surface of the column-beam frame 33 (see FIG. 3) of the brace 41. It is provided so as to restrain the out-of-plane displacement in the intersecting direction (the direction orthogonal to the paper surface in FIG. 7A, the left-right direction in FIG. 8). The out-of-plane steady rest portion 60 includes an intermediate beam side plate 61, a brace side plate 62, and a connecting pin 63. The intermediate beam side plate 61 is provided at a portion intersecting with each brace 41, extends from the upper surface of the intermediate beam member 39 toward the brace 41 side, and is provided so as to be located in a horizontal plane. A reinforcing rib 65 is provided integrally with the intermediate beam member 39 on the lower side of the intermediate beam side plate 61. The brace side plate 62 is provided at a position intersecting the intermediate beam member 39 in the brace 41, extends from the side surface 41s on the side facing the intermediate beam member 39 toward the intermediate beam member 39, and is parallel to the upper surface of the intermediate beam side plate 61. It is provided in.

As shown in FIG. 7, female screw holes 61h are formed in the intermediate beam side plate 61 at a plurality of positions spaced apart along the central axial direction D of the beam 32. Further, the brace side plate 62 is formed with an elongated hole 62h extending along the central axial direction D of the beam 32. The lower portion of the connecting pin 63 is screwed into each female screw hole 61h of the intermediate beam side plate 61, and the upper portion thereof is provided so as to be located in the elongated hole 62h of the brace side plate 62. The connecting pin 63 allows the intermediate beam side plate 61 and the brace side plate 62 to be relatively displaced along the longitudinal direction of the elongated hole 62h (the central axial direction D of the beam 32), and the lateral direction of the elongated hole 62h. That is, the relative displacement of the column-beam frame 33 (see FIG. 3) with respect to the structural surface in the out-of-plane direction is constrained. Further, the connecting pin 63 is provided with a diameter-expanded portion 64 protruding radially outward on the lower side of the intermediate beam side plate 61 and the upper side of the brace side plate 62, and the intermediate beam side plate 61 and the brace side plate 62 are provided. It restrains the relative movement in the vertical direction with.

According to the vibration damping building 1 as described above, the vibration damping building 1 has a vibration damping mechanism 40 in which a damper 43 is installed between the upper structure 20 and the lower structure 10, and the vibration damping mechanism 40 is a vibration damping building 1. The lower structure includes a brace 41 attached to the lower structure 10, a damper mounting portion 42 attached to the brace 41, a damper 43, and a locking portion 44 attached to the upper structure 20. When the relative displacement of the superstructure 20 with respect to 10 exceeds the relative displacement amount within the preset allowable range, a part of the damper mounting portion 42 abuts on the locking portion 44 to cause the relative displacement of the superstructure 20. Suppress with brace 41.
Specifically, as described above, the damper 43 is installed in the centralized vibration damping layer 30 between the upper structure 20 and the lower structure 10, and the brace 41 constituting the fail-safe mechanism is the lower structure 10. The locking portion 44 is installed in the lower part of the upper structure 20 while being installed in the lower structure 10 so as to be located in the beam-column structure 33 constituting the centralized vibration damping layer 30 installed in the upper part of the structure. It is installed in the superstructure 20 so as to be located in the beam-column structure 33 constituting the centralized vibration damping layer 30.
According to such a configuration, when the relative displacement of the upper structure 20 with respect to the lower structure 10 occurs at the time of an earthquake, the brace 41 attached to the lower structure 10 and the damper mounting portion 42 attached to the brace 41 are attached. The damper 43 provided via the damper 43 absorbs the seismic energy acting on the building 1 and suppresses the displacement. Therefore, when the relative displacement of the upper structure 20 with respect to the lower structure 10 is smaller than the relative displacement amount within the preset allowable range, the horizontal displacement generated in the upper structure 20 is absorbed by the damping force of the damper 43. The relative displacement between the lower structure 10 and the upper structure 20 is reduced. However, when the relative displacement of the upper structure 20 with respect to the lower structure 10 exceeds the relative displacement amount within the preset allowable range, a part of the damper mounting portion 42 comes into contact with the locking portion 44, so that the upper structure The brace 41, which integrates the relative displacement of the body 20 with the lower structure 10, functions as a shear resistance member, and the displacement is suppressed. Here, since the braces 41 and 41 are provided on the lower structure 10 side in an inverted V shape, a truss-shaped shear resistance member when the locking portion 44 abuts on the damper mounting portion 42. And can efficiently suppress the relative displacement of the superstructure 20.
As a result, even if one of the largest possible earthquakes or a huge earthquake that exceeds expectations occurs, it is highly versatile enough to prevent the collapse and collapse of the vibration damping building 1 and protect human lives. It is possible to provide a vibration damping building 1 with a vibration damping mechanism 40 provided with a fail-safe system.

Further, an out-of-plane movement restraining material 50 is installed in the damper mounting portion 42 so as to sandwich the hanging steel plate 35 projecting downward from the upper structure 20.
Specifically, as described above, the vertical steel plate 35 is installed so as to project downward from the upper structure 20 including the beam member 32A of the column-beam frame 33 constituting the centralized vibration damping layer 30.
According to such a configuration, when the damper mounting portion 42 tries to move in the out-of-plane direction, the out-of-plane movement restraining material 50 comes into contact with the vertical steel plate 35, so that the surfaces of the brace 41 and the damper mounting portion 42 Outward movement is constrained. As a result, the displacement acting on the superstructure 20 can be efficiently suppressed by the damper 43.

Further, an intermediate beam member 39 is erected in the intermediate portion in the height direction of the brace 41 in a direction intersecting the brace 41, and an out-of-plane displacement of the brace 41 is provided between the brace 41 and the intermediate beam member 39. An out-of-plane steady rest 60 is installed to restrain the.
According to such a configuration, the out-of-plane steady rest portion 60 provided between the brace 41 and the intermediate beam member 39 intersecting with the brace 41 restrains the displacement of the brace 41 in the out-of-plane direction. As a result, excessive deformation of the brace 41 in the out-of-plane direction can be suppressed, and displacement acting on the upper structure 20 can be effectively suppressed by the brace 41 on the lower structure 10 side.

(Modified example of the embodiment)
The vibration damping building with a fail-safe mechanism of the present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
For example, in the above embodiment, the configuration of the out-of-plane steady rest unit 60 is illustrated, but the out-of-plane steady rest portion 60B may have the following configuration.
FIG. 9A is a partially enlarged front view showing the configuration of a modified example of the out-of-plane steady rest portion. 9 (b) is a cross-sectional view taken along the line I-I of FIG. 9 (a), and FIG. 9 (c) is a cross-sectional view taken along the line JJ of FIG. 9 (a). It is a figure which shows the structure of the modification of the modification of the out-of-plane steady rest part, and the cross-sectional view taken along the line CC in FIG. 9 is shown in FIG.
As shown in FIGS. 9 and 10, the out-of-plane steady rest portion 60B includes an intermediate beam side plate 61B, a brace side plate 62B, and a connecting pin 63. The intermediate beam side plates 61B are provided on both sides in the central axial direction D with respect to the brace 41 at a portion intersecting with each brace 41. Each intermediate beam side plate 61B extends from the upper surface of the intermediate beam member 39 toward the brace 41 side and is located in the horizontal plane. The brace-side plate 62B extends from the side surfaces 41c and 41d on both sides of the beam 32 in the central axial direction D in each brace 41, and is provided parallel to the upper surface of each intermediate beam-side plate 61B.

A female screw hole 61 g is formed in the intermediate beam side plate 61B. Further, the brace side plate 62B is formed with an elongated hole 62g extending along the central axial direction D. The lower portion of the connecting pin 63 is screwed into the female screw hole 61 g of each intermediate beam side plate 61B, and the upper portion thereof is provided so as to be located in the elongated hole 62 g of the brace side plate 62B. By this connecting pin 63, the intermediate beam side plate 61B and the brace side plate 62B are allowed to be relatively displaced along the longitudinal direction (central axis direction D) of the elongated hole 62 g, and the lateral direction of the elongated hole 62 g, that is, the column. The relative displacement of the beam frame 33 (see FIG. 3) with respect to the structure surface in the out-of-plane direction is constrained. Further, the connecting pin 63 is provided with a diameter-expanded portion 64 protruding radially outward on the lower side of the intermediate beam side plate 61B and the upper side of the brace side plate 62B, and the intermediate beam side plate 61B and the brace side plate 62B are provided. It restrains the relative movement in the vertical direction with.

(Other variants)
Further, in the above embodiment, the configuration including the braces 41, 41 and the damper 43 is given as an example of the vibration damping mechanism 40, but a configuration other than the above may be provided. For example, the braces 41 and 41 are provided in an inverted V shape, and as shown in FIG. 11, the braces 41 and 41 are formed in a V shape and joined to the beam 32A above the column-beam frame 33. The damper 43 may be provided on the beam 32B side below the column-beam frame 33. In addition to this, the shape and arrangement of the brace 41 and the damper 43 can be changed as appropriate.
Further, the damper 43 is not limited to the hydraulic cylinder, and may be of another type such as a viscoelastic damper.
Further, the installation position of the vibration damping mechanism 40 is not limited to the installation position and the installation direction, and may be appropriately arranged so as to obtain the desired vibration damping property according to the configuration of the vibration damping building 1. ..
In addition to this, as long as it does not deviate from the gist of the present invention, it is possible to select the configuration described in the above embodiment or change it to another configuration as appropriate.

1 Vibration control building 40 Vibration control mechanism (fail-safe mechanism)
10 Lower structure 41 Brace 20 Upper structure 42 Damper mounting part (vibration damping device mounting part)
30 Centralized damping layer 43 Damper (vibration damping device)
32 Beam (beam member) 44 Locking part 33 Column-beam frame 50 Out-of-plane movement restraint 35 Vertical steel plate 60 Out-of-plane steady rest 39 Intermediate beam member

Claims (3)

It is a vibration control building with a fail-safe mechanism in which a vibration control device is installed between the upper structure and the lower structure of the building.
The fail-safe mechanism is provided between the brace attached to the lower structure, the vibration damping device mounting portion attached to the brace, and the vibration damping device mounting portion and the beam located at the lower end of the upper structure. The vibration damping device is provided with a locking portion attached to a beam located at the lower end thereof.
When the relative displacement of the upper structure with respect to the lower structure exceeds the relative displacement amount within a preset allowable range, a part of the vibration damping device mounting portion abuts on the locking portion and the upper structure The brace suppresses the relative displacement of the body ,
The beam located at the lower end is provided with a vertical steel plate so as to project vertically downward and extend along the central axis direction of the beam located at the lower end.
A pair of restraining members are provided in the vibration damping device mounting portion so as to sandwich the hanging steel plate.
And each of said pair of restraining members, said vertical設鋼plate, via a low-friction material and the sliding sheet provided between the fail-safe mechanism equipped system characterized that you have provided in sliding contact with Shaking building. The brace is provided so as to extend continuously over a plurality of layers.
An intermediate beam member is erected in the middle portion in the height direction of the brace in a direction intersecting the brace, and an out-of-plane displacement of the brace is restrained between the brace and the intermediate beam member. An out-of-plane steady rest is installed ,
The vibration damping building with a fail-safe mechanism according to claim 1 , wherein both ends of the intermediate beam member are pin-joined. The vibration damping device is a damper.
Damper brackets are provided so as to project downward from the beam located at the lower end of the vibration damping device mounting portion at intervals along the central axis direction, and both ends of the damper are the damping device. It is connected to the vibration device mounting part and the damper bracket,
The fail-safe according to claim 1 or 2, wherein a mechanism is provided between the damper bracket and the column to which the beam located at the lower end is joined to allow the relative displacement of the damper bracket in the horizontal direction. Vibration control building with mechanism.

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