JPH05231033A - Damper for vibration preventing device of building - Google Patents

Abstract

PURPOSE:To provide a damper which may sufficiently damp vibration having a large inertia force, and which may be used in a long time. CONSTITUTION:A damper comprises a damper body 3 having a rod-like shape, a building side receptacle 1 for supporting the upper end part of the damper body 3, and a base side receptacle 2 for supporting the lower end part of the body 3. That is, in the damper in which vibration causing the building side receptacle 1 and the base side receptacle 2 to horizontally move, relative to each other, is absorbed with the use of plastic deformation having a configuration such that the damper body 3 is curbed, the damper body 3 is formed of a plurality of elongated long member made of metal material having a relatively high stiffness.

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 has durability and reliability against repeated deformation and which absorbs vibration such as seismic energy.

[0002]

2. Description of the Related Art As a damper for a seismic isolation device for buildings,
For example, there is one shown in FIG. 4, which is composed of a rod-shaped damper main body 3 and a building-side receiving body 1 and a ground-side receiving body 2 which support the damper main body 3 at both ends. There is. The damper main body 3 is configured by providing a Tyco-shaped sliding portion 38 on the upper end portion of a steel rod body 39, and the lower end portion of this is fixed to the ground side receiving body 2 attached to the ground side, The sliding portion 38 is slidably inserted into the hole of the building-side receiving body 1 attached to the building side. In this case, the ground-side receiving body 2 is provided with a deformation restraint guide formed in the funnel-shaped curved surface concave portion, and the lower end portion of the damper main body 3 is inserted into the central hole portion of the funnel-shaped curved surface concave portion. It is fixed in the manner described below.

Therefore, when the ground-side receiving body 2 and the building-side receiving body 1 vibrate so as to move horizontally relative to each other, the sliding portion 38 moves vertically with respect to the building-side receiving body 1. By repeating the above, the damper main body 3 repeats the deformation while the ground-side receiving body 2 is constrained to the funnel-shaped curved surface.
Therefore, the damper main body 3 described above does not bend with a small radius of curvature, and as a result, the damper main body 3 is not destroyed in an extremely short period of time.

However, even in the damper of the seismic isolation device for a structure devised as described above, when the damper main body 3 is a thick steel rod in order to damp vibrations having a large inertial force, the bent portion thereof The difference between the inner and outer radii of curvature becomes large, and as a result, the damper main body 3
Will be destroyed in a relatively short period of time. It should be noted that the above occurs regardless of the structures of the ground-side receiving body 2 and the building-side receiving body 1.

[0005]

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a building seismic isolation device damper which can sufficiently damp vibration having a large inertial force and can be used for a long period of time. And

[0006]

The invention according to claim 1 is directed to a damper main body formed in a rod shape, a building-side receiver for supporting an upper end portion of the damper main body, and a lower end portion of the damper main body. And a ground-side receiving body that supports
In a damper of a seismic isolation device for a structure, which absorbs vibrations that relatively move the building-side receiving member and the ground-side receiving member in a horizontal direction by utilizing plastic deformation in a mode in which the damper main body bends. Further, the damper main body is composed of a plurality of thin long members made of a metal material having a relatively high rigidity.

The invention according to claim 2 is characterized in that a damper main body formed in a rod shape, a building-side receiver for supporting an upper end portion of the damper main body, and a ground side for supporting a lower end portion of the damper main body. A vibration composed of a receiving body and horizontally moving the building-side receiving body and the ground-side receiving body,
In a damper for a seismic isolation device for a structure of a type that absorbs plastic deformation in a manner in which the damper main body bends, the damper main body is composed of a plurality of thin long members made of a metal material having relatively high rigidity. And a soft covering material for covering these elongated members.

[0008]

The present invention operates as follows. (Operation of the invention described in claim 1) When the ground-side receiving body and the building-side receiving body are in an oscillating state to relatively move in the horizontal direction, the damper main body is plastically deformed, but the damper main body is constituted. Since the long member is made of a thin metal material having relatively high rigidity, the difference between the inner and outer radii of curvature of each long member is small.

Although the long member is thin, since a plurality of long members are provided, the damping effect is sufficient. (Operation of the invention described in claim 2) In addition to the effect of the invention described in claim 1, it further has an effect of preventing irregular bending and so-called variation of each long member.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below with reference to the drawings shown as embodiments. As shown in FIG. 1, a damper of a seismic isolation device for a building according to this embodiment includes a rod-shaped damper main body 3 and a building-side receiving body 1 that supports an upper end portion of the damper main body 3 so that only the vertical movement is possible. And the ground-side receiving body 2 that supports the lower end of the damper main body 3.

The building-side receiving body 1 is made of steel as a whole, and as shown in the figure, a cylindrical main body 10 having a fixing portion 11 for mounting on the building side, and the main body 10 described above. It is constituted by a ring-shaped support tool 12 fixedly arranged on the inner peripheral surface of the. The ground-side receiving body 2 is made of steel as a whole like the building-side receiving body 1, and as shown in the figure, a cylindrical main body having a fixing portion 21 for mounting on the ground side. 20 and a ring-shaped support 22 fixedly arranged on the inner peripheral surface of the main body 20.

The above-mentioned supporting members 12 and 22 are formed with an R-shaped inner peripheral portion, whereby the damper main body 3 is formed.
The bending radius of is not small. As shown in FIGS. 1 and 2, the damper main body 3 arranges eight thin steel rods 30 (corresponding to the long member in the column of the means) in a substantially circular shape in a plane, and these steel rods 30 are connected to lead wires. Is used as the covering material 31 and is coated as much as possible to form a rod shape having a circular cross section.

Since the damper of the seismic isolation device for the building is constructed as described above, the damper main body 3 of this embodiment is used.
Made of one steel rod having the same bending rigidity as
The following can be said in comparison with the reference). That is, when the damper main body 3 of this embodiment is bent by the same amount as that of the reference, the difference between the inner and outer curvature radii of the steel rods 30 is small, whereas that of the reference is large. The damper main body 3 in the example can be used for a long period of time as compared with the reference example.

In the above embodiment, the steel rod 30 is used as the plastic deformation material of the damper main body 3, but the present invention is not limited to this, and a rod material made of brass material may be used. Any metal material having a certain stress can be used. Further, in the above embodiment, lead was used as the covering material 31 of the plurality of steel rods 30, but the present invention is not limited to this, and soft steel materials, rubber materials, plastics and the like may be used.

Further, the plurality of steel rods 30 in the above embodiment is used.
Can be regarded as a body formed by twisting a cylindrical body or a thin wire made of the above metal material. Further, instead of the arrangement of the steel rods 30 of the above-mentioned embodiment, the arrangement shown in FIG. 3 or other arrangements can be adopted.

[0016]

The present invention having the above-mentioned structure has the following effects. From the description in the action column, vibration with a large inertial force can be sufficiently damped,
Moreover, it was possible to provide a damper for a seismic isolation device for a building that can be used for a long period of time.

[Brief description of drawings]

FIG. 1 is a sectional view of a damper of a seismic isolation device for a building according to an embodiment of the present invention.

FIG. 2 is a sectional view of a damper main body of the damper of the building seismic isolation device.

FIG. 3 is a cross-sectional view of another damper main body.

FIG. 4 is a sectional view of a damper of a conventional seismic isolation device for a building.

[Explanation of symbols]

 1 Building side receiving body 2 Ground side receiving body 3 Damper main body 30 Long member 31 Covering material

Claims (4)

[Claims] 1. A damper main body formed in a rod shape, a building-side receiving body that supports an upper end portion of the damper main body, and a ground-side receiving body that supports a lower end portion of the damper main body, In a damper of a seismic isolation device for a structure, which absorbs vibrations that relatively move the building-side receiving member and the ground-side receiving member in a horizontal direction by utilizing plastic deformation in a mode in which the damper main body bends. In addition, the damper of the seismic isolation device for buildings, characterized in that the damper main body is composed of a plurality of thin elongated members made of a metal material having relatively high rigidity. 2. A damper main body formed in a rod shape, a building-side receiving body that supports an upper end portion of the damper main body, and a ground-side receiving body that supports a lower end portion of the damper main body, In a damper of a seismic isolation device for a structure, which absorbs vibrations that relatively move the building-side receiving member and the ground-side receiving member in a horizontal direction by utilizing plastic deformation in a mode in which the damper main body bends. In addition, the damper main body is composed of a plurality of thin elongated members made of a metal material having a relatively high rigidity,
A damper for a seismic isolation device for a building, comprising a soft covering material for covering these long members. 3. The damper for seismic isolation device for a building according to claim 2, wherein the covering material is made of a soft metal material. 4. The seismic isolation device damper according to claim 2, wherein the covering material is made of synthetic resin or rubber material.