JP3041463B2 - 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. 9, which is composed of a rod-shaped damper body 4 and a building-side receiver 1 and a ground-side receiver 2 supporting the damper body 4 at both ends. I have. The damper main body 4 is configured by providing a Tyco-shaped sliding portion 48 at the upper end of a steel rod 49, and the lower end thereof is fixed to the ground-side receiving body 2 attached to the ground. The sliding portion 48 is slidably inserted into a hole of the building-side receiver 1 attached to the building. In this case, 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 damper main 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 48 moves up and down with respect to the building-side receiver 1. Is repeated, the damper main body 4 repeats the deformation while the ground-side receiving body 2 is restrained by the funnel-shaped curved surface.
Therefore, the above-described damper main body 4 does not bend with a small radius of curvature, and as a result, the damper main body 4 is not broken in an extremely short period of time.

However, in the damper of this seismic isolation device for buildings, although the bending of the damper main body 4 with an extremely small radius of curvature does not occur, the force concentrates in the vicinity of the fixed portion of the damper main body 4, so that this portion is not used. Of the damper main body 4 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 the force acting on the damper from concentrating. .

[0006]

A damper of a seismic isolation device for a building according to the present invention has a rigid portion having high rigidity and an axial plastic deformation projecting from upper and lower ends of the rigid portion and having a lower rigidity. And a metal damper main body in which at least the upper and lower ends of the rigid body part are enlarged in diameter than the plastic deformation part, and a hole in which the plastic deformation part on the upper end side of the damper main body is vertically movably inserted. Comprising a cylindrical building-side receiving body having a ground-side receiving body having a hole into which a plastically deformable portion on the lower end side of the damper main body is vertically movably inserted. When the receiver and the ground-side receiver relatively move in the horizontal direction, a plastically deformed portion mainly composed of a damper is provided with a fulcrum as a fulcrum at an abutting portion between an opening-side end wall of the hole and an expanded portion of the rigid body in each receiver. Move in the direction of being pulled out of the hole of each receiver

[0007]

The present invention operates as follows. When the ground-side receiver and the building-side receiver are vibrated to relatively move in the horizontal direction, the open-side end-forming walls of the holes in each of the receivers and the expanded portion of the rigid body (rigid body) With the contact part of as a fulcrum,
The plastically deformed portion (plastically deformed body) mainly composed of the damper moves in a direction to be pulled out from the hole of each receiving body. Therefore, in the above vibration state, the bending position of the main body of the damper changes, and the force acting on the main body of the damper does not concentrate on a part as described in the section of the related art.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. (Embodiment 1) As shown in FIG. 1, a damper of a seismic isolation device for a building according to this embodiment is a construction in which a metal damper main body 4 and an upper end of the damper main body 4 are supported so as to be able to move only up and down. It comprises an object-side receiver 1 and a ground-side receiver 2 that supports the lower end of the damper main 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. As shown in FIG. 1, a cylindrical main body 10 having a fixing portion 11 to be attached to the building side, and the main body 10 Is constituted by a ring-shaped support member 12 fixedly disposed on the inner peripheral surface of the ring. As shown in FIG. 1, the ground-side receiver 2 has a main body 20, a fixing portion 21, and a support tool 22 having the same configuration as the main body 10 and the fixing portion 11 of the building-side receiver 1 and the support tool 12. is there.

The support members 12 and 22 have an inner peripheral portion formed in an R-shape.
The bend radius is not reduced. The damper main body 4 is made of a steel material, and as shown in FIG. 1, is made up of a rigid portion 40 and an axial plastic deformation portion 41 protruding from upper and lower ends of the rigid portion 40. Further, as shown in the figure, the rigid body portion 40 is composed of a body portion 42 having a diameter larger than that of the plastic deformation portion 41 and projecting portions 43 provided at upper and lower ends of the body portion 42.

The diameter of the overhang portion 43 is a cylindrical main body 10.
Is set to be larger than the outer diameter of the building-side foundation A and the ground-side foundation B as shown in FIG.
Each overhang portion 43 is positioned so as to be close to (or may be in contact with) the end of the main body 10, 20 of each receiving body. The plastic deformation portion 41 has an outer diameter substantially coincident with the inner diameter of the support 12 described above, and in the construction state shown in FIG. 1, the end of the plastic deformation portion 41 is on the building-side foundation A or the ground side. It is arranged to be separated from the surface of the base B by a certain distance.

Incidentally, the damper function is performed by the deformation of the plastic deformation region of the plastic deformation portion 41 made of this steel material. Since the damper of this building seismic isolation device is configured as described above, the ground-side receiver 2 and the building-side receiver 1 are vibrated to relatively move in the horizontal direction. As shown in FIG. 2, when the ends of the main bodies 10 and 20 in each receiving body abut on the overhanging part 43 of the rigid body part 40, each plastic deformation part 41 of the damper main body 4 becomes It moves in the direction in which it is pulled out of the receiving body (the plastic deformation portions 41 move from the state shown by the two-dot chain line in FIG. 2 to the state shown by the solid line). In other words, in the above vibration state, the bending position of the plastic deformation portion 41 of the damper main body 4 changes within the range of H shown in FIG. 2, and the force acting on the damper main body as described in the section of the prior art. Will not concentrate on a part.

Therefore, the damper of the seismic isolation device for buildings does not concentrate on a part of the force acting on the damper main body 4 as described in the section of the prior art, so that it can be used for a long period of time. . (Second Embodiment) As shown in FIG. 3, the damper of the seismic isolation device for a building according to this embodiment has a structure-side receiver 1 and a ground-side receiver 2 of the first embodiment. A rigid body 40 of the damper main body 4 is formed in a cylindrical body having a larger outer diameter than the outer diameters of the main body 10 and the main body 20 (may be hollow).
It consists of. The outer peripheral portions of the upper and lower surfaces of the rigid portion 40 are opposed to the ends of the main bodies 10 and 20 (the contact may be made).
Let me.

Therefore, in this embodiment, the force for pulling out the plastically deformed portion 41 from each of the receiving members is generated by the contact between the upper and lower surfaces of the rigid portion 40 and the ends of the main bodies 10 and 20, and the damper Each of the plastic deformation portions 41 of the main body 4 moves in a direction in which the plastic deformation portion 41 is pulled out from each of the receiving bodies (the plastic deformation portions 41 move from the state shown by the two-dot chain line in FIG. 4 to the state shown by the solid line). That is, in the above vibration state, the bending position of the plastically deformable portion 41 of the damper main body 4 changes within the range of H shown in FIG. 4, and the force acting on the damper main body as described in the section of the prior art. Will not concentrate on a part.

As shown in FIGS. 5 and 6, a steel rod 45 (corresponding to the plastically deformed body in the column of means) is provided with an annular rigid body 46 made of steel. The rigid body 46 may be tightly fitted. When this structure is adopted, for example, as shown in FIGS. 7 and 8, the rigid body 46 is adjusted to a position relative to the rod 45 so that the rigid body 46 contacts only the main body 20. Since the rigid body 46 can be brought into contact only with the main body 10, the design of the damper of the building seismic isolation device is free and easy.

On the other hand, in the above embodiment, the damper main body 4 is made of a steel material. However, the present invention is not limited to this. The damper main body 4 may be made of a brass material, or a metal material having a certain stress. All can be adopted.

[0017]

Since the present invention has the above-described configuration, it has the following effects. Since the force acting on the main part of the damper does not concentrate on a part like the one described in the section of the prior art, the damper of the building seismic isolation device which 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 another embodiment of the present invention.

FIG. 6 is a view showing a state in which a ground-side receiver and a building-side receiver constituting the damper shown in FIG. 5 have relatively moved in the horizontal direction.

FIG. 7 is a sectional view of a damper of a building seismic isolation device according to another embodiment of the present invention.

8 is a view showing a state in which a ground-side receiver and a building-side receiver constituting the damper shown in FIG. 7 have relatively moved in the horizontal direction.

FIG. 9 is a sectional view of a damper of a conventional building seismic isolation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Building-side receiving body 2 Ground-side receiving body 4 Damper main body 40 Rigid part 41 Plastic deformation part 45 Rod body 46 Rigid body

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04H 9/02 F16F 7/12

Claims (2)

(57) [Claims] 1. A rigid body portion having high rigidity and an axial plastic deformation portion projecting from upper and lower ends of the rigid body portion and having lower rigidity than the rigid body portion, and at least upper and lower ends of the rigid body portion are formed by the plastic deformation portion. A metal damper with a larger diameter than
A cylindrical building-side receiver having a hole into which a plastically deformable portion on the upper end side of the damper main body is vertically movably inserted, and a plastically deformable portion on the lower end side mainly of the damper is vertically movably inserted. A ground-side receiving body having a hole, and when the building-side receiving body and the ground-side receiving body move relative to each other in the horizontal direction, an open-side end-forming wall of a hole in each receiving body; A damper for a seismic isolation device for a building, wherein a plastically deformed portion mainly composed of a damper moves in a direction of being pulled out from a hole of each receiving body with a contact point between the rigid portion and an enlarged diameter portion as a fulcrum. . 2. A metal made of an annular rigid body and a rod-shaped plastic deformer closely penetrated by the rigid body and having less rigidity than the rigid body, wherein at least upper and lower ends of the rigid body are made larger in diameter than the plastic deformable body. A damper main body, a cylindrical building-side receiving body having a hole into which a plastically deformable body at the upper end side of the damper main body is vertically movably inserted, and a plastically deformable portion at the lower end side of the damper main body moves up and down. And a ground-side receiver having a hole inserted so that the building-side receiver and the ground-side receiver can move relative to each other in the horizontal direction. A building license, wherein a plastically deformed portion mainly composed of a damper moves in a direction of being pulled out from a hole of each receiving body, with a contact point between an end constituting wall and an expanded portion of a rigid body as a fulcrum. Damper of the quake device.