JPH0243429A - Anti-seismic device for construction - Google Patents

Abstract

PURPOSE:To simplify the structure and facilitate manufacturing by composing the titled device of an isolator consisting of resilient layers and rigid layers having a pair of rigid members fixed at the upper and the lower end of the resilient layers, and dampers provided at the rigid layers and the rigid members. CONSTITUTION:An isolator 2 consists of a resilient part 6 having disc-shaped rigid members 4, 5 fixed at its upper and lower ends, and the member 5 is fixed at a ground A, while the member 4 is contacted with the bottom surface of a construction B. At the time of an earthquake or the like, a resilient layer 7 is deformed, so the construction B and the ground A are relatively displaced from each other, and circular dampers 3 of a high rigidity are provided. If the ground A vibrates by occurrence of an earthquake, the member 5 vibrates, but most of vibration is absorbed by a resilient member 8, so vibration of the construction B itself is reduced much. In addition, because of the dampers 3 protruding at the resilient layer 8 restricts deformation of the resilient layer 7 to damp vibration of the isolator 2.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention absorbs ground vibrations when an earthquake occurs to minimize the vibrations applied to buildings, and also quickly eliminates the vibrations that occur in buildings. It relates to a seismic isolation device for buildings that provides attenuation.

[Conventional technology]

In general, seismic isolation devices for buildings consist of an isolator that is installed between the ground and the building to support the building and absorb seismic waves, and a damper to dampen the vibration of the building. There is.

In conventional seismic isolation devices of this type, the isolator usually consists of a rubber body with a reinforcing plate embedded therein, and the damper consists of a steel rod, coil spring, oil damper, etc. These isolators and dampers are manufactured as separate products, and when installed, the building is supported by an appropriate number of isolators, and a damper is installed between each isolator.

[Problem to be solved by the invention]

In conventional seismic isolation devices, the isolator and damper are installed in separate locations, making it difficult to adjust the vibration damping characteristics of a building and complicating installation work.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a seismic isolation device for buildings that has a compact structure and is easy to install.

Another object of the present invention is to provide a seismic isolation device for a building that can adjust the vibration damping characteristics of the building and is easy to manufacture.

[Means to solve the problem]

In order to achieve the above object, the present invention provides an elastic layer (7).
A pair of rigid members (4) (5) that contact and are fixed to the building CB) and the ground (A), respectively, are fixed to the upper and lower ends of the elastic part (6), which is composed of a rigid layer (8) and a rigid layer (8). The damper (3) is provided on the rigid layer (8) and the rigid members (4) and (5), respectively, and dampers (3) are provided to reduce the elastic deformation of the elastic layer (7).
) is designed to be suppressed. Further, the elastic part (6) is made of a laminate of an elastic layer (7) and a rigid layer (8),
The damper (3) has a substantially annular shape and protrudes from the inner surfaces (11) of the rigid members (4) and (5) and the upper surface (9) and lower surface (10) of the rigid layer (8). Furthermore, damper (3)
The height (a) is smaller than the thickness (b) of the elastic layer (8).

[Effect]

The damper (3) is provided to protrude from the upper surface (9) and lower surface (10) of the rigid layer (8) of the isolator (2) elastic part (6) and the inner surface (11) of the rigid member (4) (5). Therefore, deformation of the elastic layer (7) due to vibration or the like can be suppressed.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical cross-sectional view showing one embodiment of the seismic isolation device according to the present invention, and the seismic isolation device (1) of the present invention is installed between the ground (A) and the structure (B). It is constructed by combining a substantially cylindrical isolator (2) and a substantially annular damper (3) provided inside the isolator (2).

The isolator (2) consists of an elastic part (6) to which disk-shaped rigid members (4) (5) made of thick steel plates, etc. are fixed at both upper and lower ends, and the lower rigid member (5) is It is fixed to the ground (A), and the upper rigid member (4) is attached to the building (B).
) and supports it.

Therefore, in the event of an earthquake or the like, the elastic portion (8) deforms and the building (B) and the ground (A) can be relatively displaced.

The elastic part (6) is 5 in this example, and the plurality of elastic layers (7)
The elastic layer (7), which is formed by vertically and horizontally stacking a plurality of rigid layers (8), is made of an elastic material such as rubber, and the rigid layer (8) is made of a steel plate. Metal plates with high rigidity such as, but not limited to, are preferred.

The damper (3) has a substantially annular shape made of a highly rigid material, and is provided protruding from the upper surface (9) and lower surface (10) of the rigid layer (8) and the inner surface (11) of the rigid members (4) and (5). has been done.

Note that the height (a) of the damper (3) is smaller than the thickness (b) of the elastic layer (7), and the upper surface (9) of the rigid layer (8)
and the damper (3) protruding from the lower surface (10) are formed to have different diameters.

Moreover, the shape of the damper (3) is also preferably approximately annular;
It is not limited to these.

Next, the operating state of the seismic isolation device (1) of the present invention will be explained. When an earthquake occurs and the ground (A) vibrates,
The lower rigid member (5) of the isolator (2) fixed to the ground (A) vibrates, but most of this vibration is absorbed by the elastic part (8), so the upper rigid member (
4), and for this reason, the building (B)
) itself will have very small vibrations.

At the same time, the rigid members (4)' (5) and the rigid layer (
The damper (3) protruding from 8) also vibrates along with the vibrations of the rigid members (4) (5) and the rigid layer (8) while the vibrations are small, but large vibrations or horizontal vibrations occur. In this case, the elastic layer (7) deforms largely relative to the rigid layer (8), so the damper (3) protruding from the rigid layer (8) suppresses the deformation of the elastic layer (7). shear stress)
It works to control the vibration of the isolator (2).

Therefore, the vibrations of the isolator (2) caused by large vibrations or horizontal vibrations can be controlled and attenuated, so that the vibrations of the building (B) itself become extremely small.

This means that the elastic layer (7) of the conventional isolator (2)
Compared to the graph in Figure 4, which shows the deformation due to the earthquake,
The graph in the figure shows the damper (
3) clearly shows that the deformation of the elastic layer (7) is suppressed by the control.

Note that the damper (3) can have a shape other than a substantially annular shape, and by adjusting its height (b), it can cope with various vibrations.

Therefore, the structure is very compact, and the damping performance can be easily adjusted.

〔Effect of the invention〕

As is clear from the above explanation, the building seismic isolation device (1) of the present invention connects the damper (3) to the isolator (2).
Since it is installed internally, it has a very compact configuration, and the installation work is simple because all that is required is to install the conventional isolator (2).

In addition, the damping performance of the elastic part (6) can be adjusted simply by changing the diameter and height (b) of the damper (3), so the vibration damping characteristics of the building (B) can be easily and accurately adjusted. can.

Furthermore, the building seismic isolation device (1) of the present invention has the excellent effect of being easily manufactured because it does not use any special structure or materials.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing the overall structure of an embodiment of the seismic isolation device of the present invention, FIG. 2 is a perspective view showing the entire damper protruding from a rigid layer according to the present invention, and FIG. 4 is a graph showing the shear stress of the seismic isolation device of the present invention, and FIG. 4 is a graph showing the shear stress of the conventional example. (2)...Isolator (3) Rigid member (6)...Rigid layer of elastic part (A)...Ground (B)...Damper (4) (5)...(7)...・Elastic layer (8)... Building

Claims (1)

[Claims] 1. A building (B) and a ground (A
) a pair of rigid members (4) (
5) and a rigid layer (8).
) and a damper (3) provided on each of the rigid members (4) and (5), and the damper (3) is configured to suppress elastic deformation of the elastic layer (7). Seismic isolation device for buildings. 2. The elastic part (6) has an elastic layer (7) and a rigid layer (8)
Claim 1 characterized in that it is composed of a laminate of
Seismic isolation device for the listed buildings. 3. The seismic isolation device for a building according to claim 1 or 2, wherein the damper (3) has a substantially annular shape. 4. The damper (3) is connected to the inner surfaces (11) of the rigid members (4) and (5) and the upper surface (9) and lower surface (10) of the rigid layer (8).
The seismic isolation device for a building according to any one of claims 1 to 3, wherein the seismic isolation device for a building is provided in a protruding manner. 5. The height (a) of the damper (3) is the same as that of the elastic layer (7).
The seismic isolation device for a building according to any one of claims 1 to 4, characterized in that the thickness (b) is smaller than the thickness (b).