JPH0516505B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a seismic attenuation structure for a structure, and particularly to an attenuation structure for preventing deformation of side walls due to shaking of the structure.

<Conventional technology> Architectural structures such as buildings (hereinafter simply referred to as structures)
In order to protect the wall surface from shaking due to earthquakes or strong winds, some structures have a seismic attenuation structure by reinforcing the side walls, but a conventional example of such a seismic attenuation structure is shown in Figure 6. There is something to show. This shows the frame state of the structure 1, whose side walls are suspended between a pair of pillars 2 erected at a predetermined interval, and between the pillars 2 at the ceiling of each floor. A frame body is constituted by the beams 4 that support the floor portion 3 of the floor, and a wall surface is formed by pouring concrete inside this frame body. The seismic attenuation structure of this side wall portion consists of a pair of braces 5a and 5b each having one end connected to a corner portion of the frame, that is, both ends of the beam 4, extending in the diagonal direction of the frame so as to intersect with each other. The other end is connected to the base end of each support. For example, if the structure shakes due to an earthquake and the side wall portion of the structure is about to deform as shown by the dotted line in Figure 6, the tensile rigidity of the brace 5a or the compressive rigidity of the brace 5b will prevent the deformation. Prevent and protect the wall surface.

<Problems to be Solved by the Invention> However, in such a conventional seismic attenuation structure, the braces 5a and 5b installed diagonally with respect to the frame are directly connected and fixed to the pillars 2 or beams 4. Therefore, the shaking of the structure 1 is caused by the brace 5.
It is absorbed by the tensile or compressive deformation of a and 5b. However, when the structure 1 attempts to deform as shown by the dotted line in FIG. 6 due to a major earthquake, etc., the shaking cannot be absorbed by the tension or compression of the reinforcing rods 5a, 5b, and the braces 5a, 5b may break, or a portion of the support column 2 or beam 4 may break.

The present invention has been made in view of these conventional problems, and its purpose is to provide a disk damper which is designed to attenuate the shaking of a structure caused by an earthquake, etc., and which is coupled to a brace of the structure. The aim is to provide a seismic attenuation structure consisting of:

<Means for Solving the Problems> In order to achieve the above object, the present invention rotates a first disk and a second disk having an arm structure relative to each other at their base ends with the intervention of a friction material. A plurality of disc dampers each having a movable distal end portion that can be coupled together by pressure contact are sequentially coupled to each other, and one end of a brace is coupled to each of the distal end movable portion coupling point and the distal proximal coupling point of each disc damper. The gist is a seismic attenuation structure in which the other end of the brace is connected to the frame corner of the side wall of the structure.

<Operation> When a force such as an earthquake is applied to a structure, the structure itself shakes and undergoes flexural deformation. Regarding the side walls of a structure, when there is a small shaking caused by a small earthquake, the static friction of the disk damper reduces the vibration, and the structure is prevented from shaking. On the other hand, in the event of large shaking such as in a major earthquake, the disk damper rotates due to the tension of the brace, and while it absorbs energy by using the dynamic friction force generated at this time as a damping force, it is unable to follow shaking that exceeds a certain level. This movement reduces earthquakes and prevents excessive deformation of the structure.

<Example> FIGS. 1 to 5 are diagrams showing an example of a seismic attenuation structure according to the present invention. As shown in Fig. 1, the seismic attenuation structure according to this embodiment includes a pair of pillars 2 erected at a predetermined interval on the side walls, and a pair of pillars 2 suspended between the pillars 2 on the ceiling of each floor. The present invention is applied to a structure 1 in which a frame body is constituted by a beam 4 that supports a floor portion 3 of an upper floor, and a wall surface is formed by pouring concrete inside this frame body. This seismic attenuation structure combines two disc dampers 7 made up of a pair of discs 6 to form a link mechanism 18, and a plurality of braces 8a, 8b, 8c, 8 are attached to the combination of disc dampers 7.
While joining one end of each brace 8a, 8
The other ends of b, 8c, and 8d are connected to the corner portions of the frame.

As shown in FIGS. 2 and 3, the disk damper 7 has a first arm structure in which the distal end portion is formed into a gradually pointed circular shape and the base end portion is formed into a disc shape. A disk 6a, a second disk 6b which has substantially the same arm structure as the first disk 6a and is rotatably coupled to the first disk 6a at its base end portion, and these first disks. 6a and a friction material 9 interposed between the second disk 6b and pressed between the two. In this embodiment, the friction material 9 is a disk-shaped body made of leather or other material, and is fixedly attached to both the front and back surfaces of the first disk 6a, as shown in FIG. A presser plate 15 is applied to the friction material 9 from above, while a second disk 6b is applied to the lower friction material 9 from below. Then, the first and second disks 6
a, 6b, the friction material 9, and the holding plate 15 have a through hole formed almost in the center, and a bolt 10 is inserted into this through hole.
is inserted, a spring 11 is loaded from the tip side of the bolt 10, and a nut 12 is screwed together, thereby tightening the first disk 6a.
and the second disk 6b are coupled so as to be relatively rotatable, and both members are pressed into contact with each other with a friction material 9 interposed. Also, the first and second disks 6a,
Connecting shafts 14a and 14b for connecting the disc damper 7 are attached to the distal end of the disc damper 7 through bearings 13a and 13b, thereby forming a coupling point for the movable distal end of the disc damper 7.

As shown in FIG. 4, two disk dampers 7 configured as described above (distinguished as 7a and 7b for convenience of explanation below) are connected to the movable end portions of each disk 6 to form a link mechanism 18. Configure. That is, the first disk 6 of the disk damper 7a
a is pivotally connected to the first disk 6a of the disk damper 7b, and the second disk 6b of the disk damper 7b is pivotally connected to the second disk 6b of the disk damper 7b. And disks 6a, 6b
At the distal end movable portion connection points 17a, 17b configured by pivotally mounting the disks 6a, 6
b can freely rotate relative to each other. Further, in each disk damper 7a, 7b, the disk 6a,
The proximal ends of 6b are pivotally connected to each other to form the proximal connection point 1.
6a and 16b are formed. As is clear from FIGS. 1 and 3, a brace 8a is attached to the base end connection point 16a of the disk damper 7a.
One end of this brace 8a is connected, while the other end of this brace 8a is connected to the right end of the beam 4, which corresponds to the upper right corner of the frame in FIG. Also disk damper 7
One end of a brace 8b is connected to the base end connection point 16b of b, while the other end of this brace 8b extends in a direction substantially diagonally opposite to the brace 8a, and is connected to the right support column 2 which is in contact with the lower left corner of the frame body. is connected to the lower end of the . Furthermore, the tip movable part connection point 1
One end of a brace 8c is coupled to 7a, while
The other end of this brace 8c is connected to the left end of the beam 4, which corresponds to the upper right corner of the frame. Furthermore, one end of a brace 8d is coupled to the tip movable portion coupling point 17b, while the other end of this brace 8d extends in a direction substantially diagonally opposite to the brace 8c, and is attached to a left-hand support column that is in contact with the lower right corner of the frame. It is connected to the lower end of 2. And brace 8a,
In the part where the other end of the brace 8c is connected to the beam 4 or the part where the other end of the braces 8b, 8d is connected to the support column 2, each brace 8a, 8b, 8c, 8d is connected as shown in FIGS. A spherical part 21 is formed at the other end, while the spherical part 21 is formed on the beam 4 or the pillar 2.
A connection chamber 19 is formed which can accommodate the spherical portion 21 and prevent the spherical portion 21 from falling out, and the connection between the spherical portion 21 and the connection chamber 19 is established. Since the connecting chamber 19 has a hollow structure extending in the length direction of the brace 8, a play space 20 is formed in the brace 8.

In the seismic attenuation structure having such a configuration, the initial state is set to a nearly square parallelogram link structure in which none of the disk dampers pivots, as shown in FIG. 4a. When a relatively weak external force such as a small earthquake acts on the structure 1 equipped with this seismic attenuation structure, the shaking of the structure 1 is also small, so this shaking is caused by each disk damper 7a forming the link mechanism 18, The static friction force of 7b causes the link mechanism 2 to
1 can be minimized without deforming it. In this case, the link mechanism 18 (or the disk dampers 7a, 7b) prevents the structure 1 from deforming in a rigid structure state.

On the other hand, due to the occurrence of a major earthquake, etc., the first
As shown in the figure, the X-axis direction (indicated by arrow P in the figure)
When a force acts on the structure 1 and the structure 1 attempts to deform as shown by the dotted line, a tensile force acts on the braces 8a and 8b, while a compressive force acts on the braces 8c and 8d. When these forces are received, a relative rotational movement occurs between the first disk 6a and the second disk 6b in the disk dampers 7a, 7b, and a frictional force is generated between the two disks 6a, 6b, resulting in energy , and exerts a large resistance against the rotational movement. The link mechanism 18 is then deformed from the shape a in FIG. 4 to the shape b in FIG. During this deformation, resistance due to frictional force acts from the link mechanism 18 to each of the braces 8a, 8b, 8c, and 8d in the direction shown by arrow F in FIG. 4b. As a result, the force P applied to the structure 1 is significantly weakened, and the shaking of the structure 1 is significantly attenuated. In response to large shaking, the link mechanism 18 moves following the deformation of the structure 1.

In the above embodiment, two disk dampers 7a and 7b are connected to form a link mechanism 18 in order to construct a seismic attenuation structure, but even if three or more disk dampers are connected, braces cannot be placed at predetermined connection points. A similar effect can be achieved by connecting them to a structure.

<Effects of the Invention> As explained above, according to the present invention, it is possible to realize a seismic attenuation structure having a link mechanism in which a plurality of disk dampers are combined, thereby attenuating the shaking of the structure. As a result, it is possible to prevent breakage of braces and damage to structures, resulting in benefits such as easier maintenance.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of application of one embodiment of the seismic attenuation structure according to the present invention to a structure, FIG. 2 is a plan view of a disk damper used in the embodiment, and FIG. 3 is the same as shown in FIG. FIG. 4 is a side view of the disk damper, and FIG. 4 is a diagram showing the deformation operation of the link mechanism in the embodiment, FIG. 4a is a state before deformation, FIG. Figure 5 shows the structure of the brace connection to the structure. Figure 5a shows the connection between the beam and the brace, Figure 5b shows the connection between the column and the brace, and Figure 6 shows the conventional structure. FIG. 2 is a diagram showing an example of application of a seismic attenuation structure to a structure. 1... Structure, 2... Support, 3... Floor part, 4
...Beam, 6...Disk, 7...Disk damper, 8a, 8b, 8c, 8d...Brace, 9...
...Friction material, 10...Bolt, 12...Nut, 1
3a, 13b...Bearing, 14a, 14b...
...Connection shaft, 16... Proximal connection point, 17
a, 17b... tip movable part connection point, 18... link mechanism.

Claims (1)

[Claims] 1. A first disk having an arm structure, and a second disk having an arm structure that is pressed into contact with the first disk with the intervention of a friction material and is rotatable relative to the first disk. Multiple disk dampers are connected at the base end of both disks,
The tip movable portions of each disk of each disk damper are sequentially coupled, and one end of the brace is coupled to the disk base end coupling point and the tip movable portion coupling point of a predetermined disk damper, while the other end of the brace is connected to the structure. A seismic attenuation structure for a structure, characterized by being connected to the corner of the frame of an object.