JP3041462B2 - Damper for seismic isolation device for buildings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper for a seismic isolation device for a building which absorbs vibration such as seismic energy and has durability and reliability against repeated deformation.

[0002]

2. Description of the Related Art Dampers for seismic isolation devices for buildings include:
For example, there is one as shown in FIG. 7, which comprises a rod-shaped plastic deformable body 4 and a building-side receiver 1 and a ground-side receiver 2 supporting the plastic deformable body 4 at both ends. Have been. The plastically deformed body 4 is formed by providing a Tyco-shaped sliding portion 41 at the upper end of a steel rod 40, and the lower end thereof is fixed to the ground-side receiving body 2 attached to the ground. The sliding portion 41 is slidably inserted into a hole of the building-side receiver 1 attached to the building. In this example, the ground-side receiving body 2 is provided with a deformation constraint guide formed in a funnel-shaped curved concave portion, and the lower end of the plastic deformable body 4 is inserted into a central hole of the funnel-shaped curved concave portion. In a fixed manner.

Therefore, when the ground-side receiver 2 and the building-side receiver 1 vibrate so as to relatively move in the horizontal direction, the sliding portion 41 moves up and down with respect to the building-side receiver 1. Is repeated, the plastic deformation body 4 repeatedly deforms while the ground-side receiving body 2 is restrained by the funnel-shaped curved surface. Therefore, the above-described plastic deformation body 4 is not bent with a small radius of curvature, and as a result, the plastic deformation body 4 is not broken in an extremely short period.

However, in the damper of the seismic isolation device for a building, although the plastic deformation body 4 does not bend with an extremely small radius of curvature, the force concentrates in the vicinity of the fixed portion of the plastic deformation body 4. Destruction of the plastic deformation body 4 at a portion occurs in a relatively short period of time.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a damper for a building seismic isolation device which can be used for a long period of time by preventing a force acting on a plastically deformed body from being concentrated. I do.

[0006]

According to a first aspect of the present invention, there is provided a damper for a building seismic isolation device, comprising: a movable plate mounted between a ground foundation and a building foundation so as to be horizontally movable on the same plane. A plastic deformable member formed of a metal rod and having a substantially central portion rotatably attached to the movable plate; and a building-side receiving member that supports the upper end of the plastic deformable member so that it can only move up and down. And a ground-side receiving body that supports the lower end of the plastic deformable body so that it can only move up and down.

According to a second aspect of the present invention, there is provided a damper for a building seismic isolation device, comprising: a plastically deformed body formed of a metal rod;
A building-side receiver that supports the upper end of the plastic deformable body so that only vertical movement is possible, a ground-side receiver that supports the lower end of the plastic deformable body that is only movable vertically, and the building-side receiver; A rubber material fixedly disposed in the bearing and fixed to the upper end of the plastic deformation body, and a rubber material fixedly disposed in the ground-side receiving body and fixed to the lower end of the plastic deformation body And

According to a third aspect of the present invention, there is provided a damper for a seismic isolation device for a building, wherein the damper comprises a plastically deformed body formed of a metal rod.
A ground-side receiver that supports the lower end of the plastic deformable body so that it can only move up and down, a building-side receiver that supports the upper end of the plastic deformable body that can only move up and down, and the building-side receiver It has a spring fixedly disposed in the bearing body and supporting the upper end of the plastic deformation body, and a spring fixedly disposed in the ground-side receiving body and supporting the lower end part of the plastic deformation body.

[0009]

The present invention operates as follows. (Operation of the invention according to claim 1) When the ground-side receiver and the building-side receiver are vibrated to relatively move in the horizontal direction, the movable plate is moved in the horizontal direction and the movable plate is moved to the movable plate. On the other hand, the plastic deformation body is relatively rotated, and the upper and lower ends of the plastic deformation body move up and down with respect to the building-side receiver or the ground-side receiver, respectively. Therefore, in the above vibration state, the bending position of the plastic deformation body changes, and the force acting on the plastic deformation body does not concentrate on a part as described in the section of the related art. (Effect of the invention according to claim 2) When the ground-side receiver and the building-side receiver are vibrated to relatively move in the horizontal direction, the upper and lower ends of the plastically deformed body become the building-side receiver or It will move up and down with respect to the ground-side receiver against the elastic return force of the rubber material, respectively. Therefore, in the above vibration state, the bending position of the plastic deformation body changes, and the force acting on the plastic deformation body does not concentrate on a part as described in the section of the related art. (Effect of Claim 3) When the ground-side receiver and the building-side receiver are vibrated so as to move relative to each other in the horizontal direction, the upper and lower ends of the plastically deformed body become the building-side receiver or It will move up and down against the ground-side receiving body against the urging force of the spring. Therefore, in the above vibration state, the bending position of the plastic deformation body changes, and the force acting on the plastic deformation body does not concentrate on a part as described in the section of the related art.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. (First Embodiment: Embodiment Corresponding to the Invention of Claim 1) The damper of the seismic isolation device for buildings of this embodiment is shown in FIG.
As shown in the figure, a movable plate 3 mounted horizontally movable on the same plane between a building-side foundation A and a ground-side foundation B,
A pedestal 5 that supports the moving plate 3 as described above, a rod-shaped plastic deformer 4 whose substantially central portion is rotatably attached to the moving plate 3, and an upper end of the plastic deformer 4 is vertically moved only. It has a building-side receiver 1 that supports as much as possible and a ground-side receiver 2 that supports the lower end of the plastic deformation body 4 so that it can only move up and down.

The building-side receiving body 1 is made of a steel material as a whole, and has a cylindrical main body 10 as shown in FIG.
And a fixing plate 11 for attaching this to the building side. A ring-shaped support 12 is fixedly provided on the inner peripheral surface of the main body 10. As shown in FIG. 1, the ground-side receiving body 2 has a fixing plate 21 for mounting on the ground side also serving as that of the pedestal 5, and the other main body 20 and the support tool 22 have the above-mentioned building-side receiving body 2. It has the same configuration as the main body 10 and the support 12 of the body 1.

The above-mentioned supports 12 and 22 have an inner peripheral portion formed in an R-shape, so that the bending radius of the plastic deformation body 4 is not reduced. The moving plate 3 is composed of a plate 30 and a rotating body 31 provided at the center of the plate 30, as shown in FIG. It has a hole 32.

The plastically deformed body 4 is made of a steel rod and has an outer diameter substantially matching the inner diameter of the supports 12, 22. In the assembled state, as shown in FIG.
The upper end is supported by the support 12 and the lower end is supported by the support 22 so as to be vertically movable. Note that the damper function is performed by the deformation of the plastic deformation region of the plastic deformation body 4 constituted by the steel rod.

As shown in FIG. 1, the pedestal 5 has a supporting portion 51 for attaching the moving plate 3 and legs 50 for supporting the supporting portion 51. 3 is configured to be slidably supported by being sandwiched from above and below. Since the damper of this building seismic isolation device is configured as described above, when the ground-side receiver 2 and the building-side receiver 1 are vibrated to relatively move in the horizontal direction, the following occurs. Act like so. That is, in the above state,
As shown in FIG. 2, the movable plate 3 is slid in the horizontal direction with respect to the support portion 51, and the plastic deformation body 4 is
1 to rotate relative to the moving plate 3;
The upper and lower ends of the plastic deformable body 4 move up and down with respect to the building-side receiver 1 or the ground-side receiver 2, respectively (as indicated by the solid line from the two-dot chain line in FIG. 2). The upper end is lowered and its lower end is raised). Therefore, in the above state, the position (bending position) of the plastic deformation body 4 supported by the building-side receiver 1 or the ground-side receiver 2 changes, as in the description of the related art. The force acting on the plastic deformation body 4 does not concentrate on a part.

Therefore, in the damper of the seismic isolation device for a building, the force acting on the plastically deformable body 4 does not concentrate on a part as described in the section of the prior art.
It can be used for a long time. (Second Embodiment: Embodiment Corresponding to the Invention of Claim 2) The damper of the seismic isolation device for buildings of this embodiment is shown in FIG.
As shown in the figure, a rod-shaped plastic deformable body 4, a building-side receiver 1 that supports the upper end of the plastic deformable body 4 so as to be able to move only vertically, and a lower end of the plastic deformable body 4 that only moves vertically. A ground-side receiving body 2 that supports as much as possible, a rubber material 19 fixedly disposed in the building-side receiving body 1 and fixed to an upper end of the plastic deformation body 4, and the ground-side receiving body 2. And a rubber member 29 fixed at the lower end of the plastic deformation body 4.

As shown in the figure, the plastic deformation member 4 has the same structure as that of the first embodiment. The building-side receiving body 1 is made of steel as a whole, and as shown in FIG. 3, comprises a cylindrical main body 10 and a fixing plate 11 for attaching the main body 10 to the building side. A ring-shaped support 12 is fixedly provided on the inner peripheral surface.

The ground-side receiver 2 has the same configuration as the building-side receiver 1 as shown in FIG. Rubber material 1
3, 9 and 29 are formed in a thick ring shape, and are fixed to the plastic deformation body 4 by inserting the plastic deformation body 4 into the central hole. And

Since the damper of the building seismic isolation device is constructed as described above, when the ground-side receiver 2 and the building-side receiver 1 are vibrated to relatively move in the horizontal direction. The upper and lower ends of the plastically deformable body 4 move up and down with respect to the building-side receiver 1 or the ground-side receiver 2 against the elastic restoring force of the rubber members 19 and 29, respectively (FIG. 4). As indicated by the solid line from the two-dot chain line, the upper end of the plastic deformation body 4 is pulled down,
Its lower end is pulled up). Therefore, in the above state, the position (bending position) of the plastic deformation body 4 supported by the building-side receiver 1 or the ground-side receiver 2 changes,
The force acting on the plastically deformable body 4 does not concentrate on a part as described in the section of the prior art. (Third Embodiment: Embodiment Corresponding to the Invention of Claim 3) The damper of the seismic isolation device for buildings of this embodiment is shown in FIG.
As shown in FIG. 6 and FIG.
Tensile springs S, S are used instead of 9, 29.

Therefore, when the ground-side receiving body 2 and the building-side receiving body 1 are vibrated to relatively move in the horizontal direction, the upper and lower ends of the plastic deformation body 4 are connected to the building-side receiving body 1 or the ground. Each of the side receiving members 2 moves up and down against the biasing force of the tension spring S, and has substantially the same operation as that of the second embodiment. In the above-described embodiment, the plastic deformable body 4 is constituted by a steel rod. However, the present invention is not limited to this. The plastic deformable body 4 may be constituted by a brass rod, or a metal material having a constant stress. If you can, all can be adopted.

Further, in the above embodiment, the plastic deformation body 4 is constituted by one metal rod, but the invention is not limited to this. For example, the plastic deformation body 4 may be constituted by a plurality of thin metal rods. May be provided with a protective layer on the outer peripheral portion.

[0021]

Since the present invention has the above-described configuration, it has the following effects. The position of the plastic deformable body supported by the building-side receiver or the ground-side receiver will change, and the force acting on the plastic deformable body is not concentrated in a part as described in the section of the prior art. Therefore, a damper of a building seismic isolation device that can be used for a long time can be provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a damper of a building seismic isolation device according to a first embodiment of the present invention.

FIG. 2 is a view showing a state in which a ground-side receiver and a building-side receiver constituting the damper shown in FIG. 1 have relatively moved in the horizontal direction.

FIG. 3 is a sectional view of a damper of a building seismic isolation device according to a second embodiment of the present invention.

FIG. 4 is a view showing a state in which a ground-side receiver and a building-side receiver constituting the damper shown in FIG. 3 have relatively moved in the horizontal direction.

FIG. 5 is a sectional view of a damper of a building seismic isolation device according to a third embodiment of the present invention.

FIG. 6 is a sectional view of a principal part of the damper shown in FIG. 5;

FIG. 7 is a sectional view of a damper of a conventional building seismic isolation device.

[Explanation of symbols]

 Reference Signs List A Building-side foundation B Ground-side foundation S Extension spring 1 Building-side receiver 2 Ground-side receiver 3 Moving plate 4 Plastically deformed body 19 Rubber material 29 Rubber material

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04H 9/02 F16F 7/12

Claims (3)

(57) [Claims] 1. A moving plate which is mounted between a ground-side foundation and a building-side foundation so as to be horizontally movable on the same plane, and a metal rod-like body, and a substantially central portion of the moving plate is turned around the moving plate. A plastic deformation body movably mounted, and a building-side receiving body that supports the upper end of the plastic deformation body so that it can only move up and down,
A damper for a seismic isolation device for a building, comprising: a ground-side receiver that supports a lower end of the plastic deformable body so as to be able to move only vertically. 2. A plastic deformable body made of a metal rod, a building-side receiving body that supports the upper end of the plastic deformable body so that it can only move up and down, and a lower end of the plastic deformable body. A ground-side receiving body that supports only vertical movement, a rubber material fixedly disposed in the building-side receiving body and fixed to an upper end of a plastic deformation body, and fixedly disposed in the ground-side receiving body; And a rubber material fixed to a lower end of the plastic deformation body. 3. A plastically deformable body constituted by a metal rod, a ground-side receiver for supporting a lower end of the plastically deformable body so as to be able to move only vertically, and an upper end of the plastically deformable body being vertically moved. A building-side receiving body that supports only movement, a spring that is fixedly disposed in the building-side receiving body and supports an upper end of the plastic deformation body, and that is fixedly disposed in the ground-side receiving body. And a spring for supporting a lower end of the plastic deformation body.