JP2001187939A - Vibration damper device - Google Patents

Abstract

(57) [Abstract] [Problem] As a damper for seismically isolated buildings, it can maintain stable vibration control performance against disturbances of any scale from small deformation to large deformation, but expands its deformation capacity. So that it can also be applied. A vibration damper device (10) interposed between an upper structure (A) of a building and a base (B), which is relatively displaced when a displacement force is applied, and is applied to each of the upper structure (A) and the base (B). The other ends 2a1 and 2b1 of the link-shaped plate members 2A and 2B to which the one ends 2A and 2B are attached are pivotally connected to each other,
The two link-shaped plate members 2A,
2B is configured to be rotatable relative to each other, and a viscoelastic body 5 for absorbing displacement energy is interposed between opposing surfaces around a pivot connection point of both link-shaped plate members 2A and 2B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damper device, and more particularly to a vibration damper device that exerts vibration damping performance against disturbances such as wind pressure and earthquake that cause shear deformation such as interlayer displacement in a building. The present invention relates to a vibration damper device capable of performing the following.

[0002]

2. Description of the Related Art Conventionally, as a vibration damper of this type, Japanese Patent No. 2566833 and Japanese Patent No.
No. 1, JP-A-9-256510, etc., a viscoelastic body is interposed between adjacent opposing surfaces of a plurality of rigid plate members such as a metal plate, and vibration energy is generated by shear deformation of the viscoelastic body. As disclosed in Japanese Patent No. 2541073, etc., a hydraulic chamber is formed on both sides of a piston moving in the cylinder main body, and both hydraulic chambers are formed. There is known an oil damper or the like in which a pressure regulating valve and a relief valve are provided in a flow path that communicates with each other, and a damping (damping) characteristic can be adjusted by controlling a set value of an opening / closing operation pressure by a hydraulic pressure of these valves.

[0003]

Among the above-mentioned conventional vibration damper devices, the oil damper is very complicated structurally, has a high cost, and is installed in a building. Maintenance of inspection, repair, replacement of parts, etc., as well as adjustment of vibration characteristics, is extremely difficult and is not practical as a vibration damper device used for buildings.

On the other hand, a damper using a viscoelastic body utilizes the shear deformation characteristics of the viscoelastic body, and can be constructed simply and economically as compared with an oil damper, and has a low vibration damping property. Because it is easy to perform maintenance such as adjustment and inspection, it is practical as a vibration damper for fixed structures such as buildings, and in recent years, research and development for its practical use have been progressing rapidly.

However, in a conventional vibration damper device using a viscoelastic body, the deformation capacity of the viscoelastic body becomes the deformation capacity of the damper device as it is, and a predetermined capacity is provided for a small deformation such as wind pressure or a small earthquake. Although it is possible to exhibit the vibration damping performance of the viscoelastic body against large deformation such as a large earthquake, the damper device itself is destroyed by the rupture of the viscoelastic body, not only does not exhibit the original vibration damping performance, Since the function recovery as the damper device cannot be expected, the damper device needs to be replaced.

More specifically, the deformation capability of the viscoelastic body is about three times the shear interval of the viscoelastic body, that is, about three times the layer thickness of the viscoelastic body. Your body will be broken. Therefore, when designing a vibration damper device using a viscoelastic body, it is conceivable to use a viscoelastic body having a large layer thickness to increase the deformation capacity in order to secure the deformation capacity as large as possible. As the layer thickness increases, the shear stiffness of the viscoelastic body decreases and distortion occurs during deformation, and the original damping device cannot be exhibited in a stable manner. The upper limit of the deformable amount is about 10 cm.

As described above, in a conventional damper device using a viscoelastic material in which the deformation capacity of the entire device is determined by the deformation capacity of the viscoelastic material, the deformation capacity corresponding to the original vibration damping performance and large deformation is obtained. It is technically very difficult to achieve compatibility with the capacity, and it cannot be applied at all as a vibration damper for a base-isolated building requiring a stable deformation of about 40 to 50 cm.

The present invention has been made in view of the above-described circumstances, and is capable of maintaining stable vibration suppression performance against disturbances of all sizes from small deformation to large deformation. It is an object of the present invention to provide a vibration damper that can be applied as a damper for a base-isolated building by expanding its deformation capacity.

[0009]

In order to achieve the above object, a vibration damper device according to the present invention is provided between members which are relatively displaced when a displacement force is applied and absorbs displacement energy. A vibration damper device comprising an elastic body, wherein the other end portions of the link-shaped plate members each having one end attached to each of the relative displacement members are pivotally connected to each other, and the pivotal connection point is centered on the pivotally connected point. The two link-shaped plate members are configured so as to be relatively rotatable, and between the one end portions of the both link-shaped plate members and the two relative displacement members facing them, and between the two link-shaped plate members around the pivot connection point. The viscoelastic body is interposed at least at one position between the surfaces.

According to the present invention having the above structure, when a large displacement force is applied to the relative displacement member due to the occurrence of a large earthquake or the like, the link-shaped plate members each having one end attached to each of the displacement members are provided. Without allowing excessive breaking force to act on the viscoelastic body by mechanical rotation such as relative rotation around the pivot connection point between the ends, a large relative displacement of both displacement members is allowed, that is, the damper While maintaining the deformation capacity of the device large, it is possible to absorb the relative displacement energy by the shear deformation of the viscoelastic body, stably exhibit a predetermined vibration damping performance, and maintain the performance.

In the vibration damper device having the above-described structure, the viscoelastic body may be interposed only at one location between the opposing surfaces around the pivot connection point between the other end portions of the link plate members. In addition to the above, as described in claim 2, the two link-shaped plate members are sandwiched between two ends between the one end portions of the two link-shaped plate members and the two relative displacement members opposed thereto, respectively.
As described in the above, sandwiched at three places between one end of both link-shaped plate members and both relative displacement members facing them, and between opposing surfaces of both link-shaped plate members around the pivot connection point. In particular, by adopting a configuration in which the viscoelastic body is sandwiched between a plurality of locations, the energy absorbing ability due to the shear deformation of the viscoelastic body can be increased, and the vibration damping performance can be further improved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway side view showing a first embodiment in a case where a vibration damper device according to the present invention is applied as a damper for a base-isolated building, and FIGS. 2 and 3 are taken along line XX of FIG. It is an expanded cross-sectional view along. The vibration damper device 10 according to the first embodiment includes an upper structure A of a seismic isolation building in which a load-supporting seismic isolator 11 such as a laminated rubber is interposed at another location (with one of the relative displacement members). Become)
The vibration damper device 10 is interposed at one or a plurality of positions between the base member B and the base portion B (which is the other of the relative displacement members), and is configured as follows.

That is, the link-shaped plate members 2A and 2B are respectively provided on the fixed seat 1A which can be fixedly installed on the lower surface of the upper structure A of the building and the fixed seat 1B which can be fixedly installed on the foundation B.
Are attached via pins 3A and 3B. The other end portions 2a1 and 2b1 of the link-shaped plate members 2A and 2B are connected to each other via a support shaft 4, and the connection point of the support shaft 4 is set at the center O.
A and 2B are configured to be rotatable relative to each other, and a circular viscoelastic body 5 is sandwiched between opposing surfaces of both link-shaped plate members 2A and 2B around the support shaft 4.

The viscoelastic body 5 is made of an acrylic polymer material or a rubber polymer material, and exhibits a mechanical behavior having both viscosity like a fluid and elasticity like a spring. The hysteresis loop has a history characteristic of an elliptic loop and a speed-dependent damper characteristic as shown in FIG. The two link-shaped plate members 2A, 2B and the viscoelastic body 5 may be bonded via an adhesive, or the surface adhesive force of the viscoelastic body 5 may be used without using an adhesive. It may be self-adhesive.

The vibration damper device 10 having the above-described configuration
In a seismic isolation building in which is interposed between the upper structure A and the foundation B, the two link-shaped plate members 2A and 2B of the vibration damper device 10 are vertically moved relative to each other as shown in FIG. It is in a rest position in an overlapping state.

In the normal state shown in FIG. 2, a wind pressure acts on the superstructure A, or the superstructure A and the base B are caused by an earthquake or the like.
When a horizontal relative displacement force acts between the upper structure A
The link-shaped plate members 2A, 2B having one ends 2a, 2b attached to the side and the base B side are their other ends 2a1, 2b.
As a result of the relative rotation about the pivot connection point between the b1 and the center O, the one ends 2a and 2b of the two link-shaped plate members 2A and 2B are displaced from each other as shown by the arrow direction in FIG. The relative displacement between the upper structure A and the base B is wide over a wide range without applying an excessive breaking force to the viscoelastic body 5 due to the mechanical relative rotation of the two link-shaped plate members 2A and 2B. Would be acceptable. In other words, it is possible to keep the deformation capacity of the vibration damper device 10 large and sufficiently cope with large deformation such as occurrence of a large earthquake.

However, the relative rotational (displacement) energy of the two link plate members 2A and 2B allowing the relative displacement between the upper structure A and the base portion B can be absorbed by the shear deformation of the viscoelastic body 5. In addition, due to the damper characteristic of the viscoelastic body 5, a predetermined vibration damping performance can be stably exerted against disturbances of any scale from small deformation to large deformation, and the performance can be maintained.

FIG. 5 is a partially cutaway side view showing a second embodiment in which the vibration damper device according to the present invention is applied as a damper for a base-isolated building, and FIG. 6 is taken along the line YY in FIG. It is an expanded cross-sectional view along. In the vibration damper device 10 according to the second embodiment, the viscoelastic bodies 5 are provided at two positions between the end portions 2a and 2b of the link-shaped plate members 2A and 2B and the fixed seats 1A and 1B opposed thereto. 5 are interposed therebetween, and the other configuration is the same as that of the first embodiment. Therefore, the same reference numerals are given to the corresponding portions, and the description thereof will be omitted.

According to the vibration damper device 10 according to the second embodiment, while maintaining a large deformation capacity, the deformation of the viscoelastic bodies 5, 5 at the time of large deformation is small, and the shear deformation is made smooth. It is possible to exert a uniform and stable vibration damping function over the entire target range.

FIG. 7 is a partially cutaway side view showing a third embodiment in which the vibration damper device according to the present invention is applied as a damper for a base-isolated building, and FIG. 8 is taken along the line Z-Z in FIG. It is an expanded cross-sectional view along. In the vibration damper device 10 according to the third embodiment, the two link-shaped plate members 2 around the support shaft 4 that connects the two link-shaped plate members 2A and 2B so as to be relatively rotatable.
A, 2B, and one end portions 2a, 2b of both link-shaped plate members 2A, 2B and fixed seats 1A, 1B opposed thereto.
The viscoelastic bodies 5, 5, 5 are interposed at three places between the first and second embodiments, respectively. Since other configurations are the same as those of the first embodiment, the corresponding parts are denoted by the same reference numerals. Therefore, their description is omitted.

According to the vibration damper device 10 of the third embodiment, the energy absorbing ability by the shear deformation of the viscoelastic bodies 5, 5, 5 is increased while the deformation capacity is kept large, and the vibration damping performance is further improved. It is possible to improve.

Further, the vibration damper according to the present invention comprises:
As described in the above embodiments, it can be suitably used as a damper for a seismic isolation building, but in addition to this, it can also be applied to a vibration damping brace of a building frame.

[0023]

As described above, according to the present invention, an excessive breaking force is applied to the viscoelastic body by utilizing the mechanical rotation of the link plate members attached to the relative displacement members. Large stable deformation by expanding the deformation capacity as a damper device, while maintaining stable vibration control performance against disturbances of all sizes from small deformation to large deformation without causing This can be effectively applied also as a damper for a seismic isolation building that requires the above.

In particular, by adopting the configuration as described in claim 2 or 3, the distortion of the viscoelastic body at the time of large deformation is reduced, and uniform shearing deformation enables uniform deformation over a wide range. A stable and good damping function can be secured.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a first embodiment when a vibration damper device according to the present invention is applied as a damper for a seismic isolation building. 2 and 3 are enlarged cross-sectional views taken along line XX of FIG. 1 is a partially cutaway perspective view showing a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along line XX of FIG. 1, showing a normal state.

FIG. 3 is an enlarged cross-sectional view taken along line XX of FIG. 1 and shows a state during a deformation operation.

FIG. 4 is a graph showing general hysteresis characteristics of a viscoelastic body.

FIG. 5 is a partially cutaway side view showing a second embodiment in a case where the vibration damper device according to the present invention is applied as a damper for a base-isolated building.

FIG. 6 is an enlarged cross-sectional view taken along line YY of FIG. 5;

FIG. 7 is a partially cutaway side view showing a third embodiment in which the vibration damper device according to the present invention is applied as a damper for a base-isolated building.

FIG. 8 is an enlarged cross-sectional view taken along line ZZ of FIG. 7;

[Explanation of symbols]

 2A, 2B Link-shaped plate member 2a, 2b One end of link-shaped plate member 2a1, 2b1 The other end of link-shaped plate member 4 Connecting shaft 5 Viscoelastic body 10 Vibration damper device A Upper structure (relative displacement member) B) Base part (the other of the relative displacement members)

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Kazuaki Mitsunari 12-20 Ikeda-cho, Nishinomiya-shi, Hyogo Arai Gumi Co., Ltd. (72) Kenji Higashi 12-20 Ikeda-cho, Nishinomiya-shi, Hyogo Stock (72) Inventor Shoshiro Fuchikawa 1-2-6 Minami Aoyama, Minato-ku, Tokyo Nissan Construction Co., Ltd. (72) Inventor Mutsumi Nakade 1-2-6 Minami-Aoyama, Minato-ku, Tokyo Nissan (72) Inventor Takayuki Wakai 1-17-18 Edobori, Nishi-ku, Osaka-shi, Osaka Toyo Tire & Rubber Co., Ltd. (72) Inventor Hiroaki Ichinose 1-17-18 Edobori, Nishi-ku, Osaka, Osaka Toyo Rubber industry F term (reference) 3J048 AA02 AA03 AC05 AD05 BA02 BA04 BA24 BD08 BG10 DA01 EA38 3J066 AA26 BA01 BB04 BC01 BD05 BE10 CA03

Claims (3)

[Claims] 1. A vibration damper device comprising a viscoelastic body interposed between members which are relatively displaced when a displacement force is applied and which absorbs displacement energy, wherein one end of each of said relative displacement members is provided. The other end portions of the link plate members to which the parts are attached are pivotally connected to each other, and both link plate members are configured to be relatively rotatable about the pivot connection point. The viscoelastic body is sandwiched between at least one portion between the portion and the two relative displacement members opposed to each other and between the opposed surfaces of the two link plate members around the pivot connection point. Vibration damper device. 2. The vibration damping device according to claim 1, wherein the viscoelastic body is sandwiched at two positions between one end portions of the both link-shaped plate members and two relative displacement members opposed thereto. Damper device. 3. The viscoelastic body is provided between one end of both link-shaped plate members and two relative displacement members opposed thereto and between an opposing surface of both link-shaped plate members around the pivot connection point. The vibration damper device according to claim 1, wherein the vibration damper device is interposed between the portions.