JPH04111877A - Response control device for light weight construction - Google Patents

Abstract

PURPOSE:To set an appropriate ratio of a constant of shearing spring to a constant of compression spring easily by providing low elastic members and plate-like bodies provided with rigidity and laminated alternately with them into holes of a response control device body, and providing voids among the low elastic members and holes. CONSTITUTION:Reinforcing plates 2 and elastic plates 3 are alternately laminated and, at the same time, mounting plates 1 are respectively fixed to the elastic plates 3 at both ends, and vibration damping holes 4 passing through in the direction of a center axis are provided to form a response control device body S. The low elastic members 5 having lower hardness and held among plate-like bodies 6 are respectively provided up and down so that are voids 9 between the peripheral surfaces of the low elastic members 5 and holes 4. In addition, the plate-like bodies 6 and 7 having rigidity and laminated alternately between the low elastic members 5 are provided.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The invention of this application relates to a seismic isolation device, particularly to a seismic isolation device for lightweight buildings.

[Conventional technology]

A conventional seismic isolation device for a building includes an isolator installed between the ground and the building to support the building and absorb seismic waves, and a damper to damp the vibration of the building. The isolator is usually made of a rubber body with a reinforcing plate embedded therein, and the damper is usually made of a steel rod, a coil spring, an oil damper, or the like.

The isolators and dampers are each manufactured as separate products, and when installed, the building is supported by an appropriate number of isolators, and a damper is separately installed between each isolator.

However, since the isolator and damper are installed separately, the installation work becomes complicated, and in the case of a light-weight building, the equipment becomes excessive and the cost becomes high.

Therefore, in order to solve the above-mentioned conventional problems, our company has developed a seismic isolation device equipped with holes for vibration damping that penetrate in the vertical direction.

In this type of rubber body, vibration energy applied to the rubber body is absorbed within the rubber body, and vibrations are attenuated to a greater extent than in conventional rubber bodies.

Therefore, unlike conventional seismic isolation devices, there is no need to provide a separate damper for damping, and the structure is simple.
This means that it can be manufactured and installed at low cost.

However, in designing an isolator, the ratio of the shear spring constant to the compression spring constant (shear spring constant/compression spring constant) is optimally about 1/1000, but for a small change in the diameter of the vibration damping hole, The above ratio changes greatly, making it difficult to obtain a seismic isolation device having an appropriate ratio [Problem to be solved by the invention] Therefore, in the invention of this application, the size of the vibration damping hole is Regardless of the above, it is an object of the present invention to provide a seismic isolation device for lightweight buildings in which the ratio of the shear spring constant to the compression spring constant can be easily set to an appropriate value.

[Means for solving the problem] In the invention described in claim 1 of this application, a pair of mounting plates (1
) (1) Reinforcing plates (2) and elastic plates (3) are alternately laminated between them, and the mounting plate (1) and elastic plate (3) are mutually stacked, and the elastic plate (3) and reinforcing plate (2) are mutually laminated. are fixed to each other to constitute a seismic isolation device main body (S), and a vibration damping hole (4) passing through at least the reinforcing plate (2) and the elastic plate (3) is provided in the seismic isolation device main body (S). In the seismic isolation device for lightweight buildings equipped with
and rigid plate-like bodies (6) (7) laminated alternately.
A gap (g) is provided between the outer periphery of the low elasticity member (5) and the surface constituting the hole (4), and the plate-like member (
6) (7) A seismic isolation device for lightweight buildings, characterized by being slidable between them.

Further, the invention according to claim 2 relates to the invention according to claim 1, in which the low hardness and low elasticity member (5) is arranged at a position in which the hole (4) is disposed.
), and plate-shaped bodies (6) and (7) alternately stacked are provided between the low elastic members (5) and (5).

Furthermore, the invention according to claim 3 relates to the invention according to claim 1, in which the low elastic member (5) is disposed at at least one of the upper and lower parts of the hole (4).

[Effect]

The invention of this application has the following effects.

In this seismic isolation device, the building is supported by the main body of the seismic isolation device (S), a low elastic member (5) disposed in a vibration damping hole (4), and plate-shaped bodies (6) and (7). Therefore, if the material of the low elasticity member (5) is changed, the compression spring constant will change depending on the material. In addition, in the above supported state, the low elastic member (5) is elastically deformed in a manner that spreads outward due to the existence of the gap (g), and the plate-like members (6) and (7)
An elastic return force is acting on the

In addition, in the above state, since the elastic return force from the low elastic member (5) is acting on the plate-shaped bodies (6) and (7),
When the material of the low-elasticity member (5) is changed, the pressing force between the plate-shaped bodies (6) and (7) due to the elastic restoring force changes, but the plate-shaped bodies (6) and (7) can freely slide between each other. Therefore, the change in the shear spring constant due to the change in the material of the low elastic member (5) is small.

As described above, in the seismic isolation device of the invention of this application, if the material of the low elastic member (5) is changed, the compression spring constant will change significantly without significantly changing the shear spring constant.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below with reference to the drawings showing one embodiment.

As shown in FIGS. 1 and 2, the seismic isolation device of this embodiment is formed by alternately laminating reinforcing plates (2) and elastic plates (3), and also has elastic plates (2) at both ends. ) to the mounting plate (1)
are fixed to each other, and a vibration damping hole (4) passing through in the direction of the central axis is formed to constitute the main body (S) of the seismic isolation device.

In the hole (4), low-hardness, low-elasticity members (5) sandwiched between the plate-like bodies (6) (6) are provided above and below, and the low-elasticity members (5) are alternately arranged between the low-elasticity members (5). Rigid plate-like bodies (6) and (7) are provided which are laminated on top of each other.

As shown in FIGS. 1 and 2, the mounting plate (1) has a thick annular shape and is made of steel.

The reinforcing plate (2) is a thin annular plate made of steel, and as shown in the figure, is set to have the same outer diameter as the mounting plate (1).

The elastic plate (3) is a thin annular member made of rubber or the like, and has a slightly larger outer diameter than the mounting plate (1), as shown in FIG.

As shown in FIGS. 1 and 2, the low elastic member (5) is
It is made of polybutadiene rubber (not limited to this) and has a thick inner disk shape, and is set to have a slightly smaller diameter than the diameter of the hole (4). That is, as shown in Figure 1,
In the predetermined assembled state, the outer periphery of the low elastic member (5) and the hole (
A gap (g) is formed between the component surface and the component surface 4).

As shown in the first figure, the plate-shaped body (6) is a thin disc-shaped thing made of a steel plate, and is set to be slightly smaller in diameter than the above-mentioned hole (4).

The plate-like body (7) is made of hard Teflon (friction coefficient: 0.01 to 0.10) in order to be able to slide freely between the plate-like body (7) and the plate-like body (6). As shown in FIG. 1, it is formed into a thin disc shape and has the same diameter as the plate-shaped body (6).

Since this seismic isolation device has the above-mentioned configuration, when a building is placed on top of it, its weight causes the low elasticity member (
5) changes from the state shown in Fig. 1 to the state shown in Fig. 3 due to the existence of the gap (g).
It is elastically deformed in a manner that expands outward into a state as shown in part A in the figure. In this seismic isolation device, the building consists of the main body of the seismic isolation device (S), a low elastic member (5) disposed in the vibration damping hole (4), and plate-like bodies (6) and (7). It will be supported by Therefore, in this seismic isolation device, when the material of the low elastic member (5) is changed (changed to one with a different elastic modulus), the compression spring constant changes depending on the material.

In addition, in the above state, if an external force is applied in the horizontal direction due to an earthquake, etc. as shown in Figure 4, the plates (6) and (7)
They will move relative to each other while in surface contact, but since the coefficient of friction of the plate-shaped body (7) is very small, the change in the shear spring constant due to the change in the material of the low-elastic member (5) is small. becomes.

That is, in the seismic isolation device of the invention of this application, the low elastic member (5
) If the material of In the example, the low elasticity member (5) with low hardness is placed above and below the hole (4), and the plate-shaped bodies (6) and (7) are alternately laminated as the low elasticity member (5). (5), but the low elasticity member (5) may be disposed at at least one of the upper and lower portions of the hole (4), but is not limited to this. It may also be the middle part.

〔Effect of the invention〕

Since the present invention has the above-described configuration, it has the following effects.

In the seismic isolation device of the invention of this application, when the material of the low elastic member (5) is changed, the compression spring constant changes significantly without significantly changing the shear spring constant.
Regardless of the size of the vibration damping hole, it is possible to provide a lightweight building seismic isolation device in which the ratio of the shear spring constant to the compression spring constant can be easily set to an appropriate value.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the seismic isolation device according to the invention of this application, Fig. 2 is an external perspective view of the seismic isolation device, Fig. 3 is an explanatory diagram of the main parts of the seismic isolation device, and Fig. 4 is the seismic isolation device. It is a diagram showing a state in which the device is deformed, (S...Seismic isolation device main body (g)...
・Gap (1...Mounting plate (2)...Reinforcement plate (3)
... Elastic plate (4) ... Hole (5 ... Low elastic member (6) ... Plate-shaped body (7... Plate-shaped body

Claims (1)

[Claims] 1. Reinforcing plates (2) and elastic plates (3) are alternately laminated between a pair of mounting plates (1) and (1), and the mounting plates (1) and elastic plates (3) The elastic plate (3) and the reinforcing plate (2) are fixed to each other to form a main body (S) of the seismic isolation device, and at least the reinforcing plate (2) and the elastic plate are attached to the main body (S) of the seismic isolation device. In a seismic isolation device for lightweight buildings equipped with a vibration damping hole (4) that penetrates the hole (3), low hardness and low elasticity members (5) are alternately laminated in the hole (4). Plate-shaped bodies (6) (7) with rigidity
A gap (g) is provided between the outer periphery of the low elasticity member (5) and the constituting surface of the hole (4), and the plate-shaped members (6) and (7) are slidable between each other. A seismic isolation device for lightweight buildings featuring: 2. Adjust the location of the low hardness and low elasticity member (5) to the hole (4).
2. A light-weight building according to claim 1, characterized in that plate bodies (6) and (7) are alternately laminated between the low elastic members (5) and (5). Seismic isolation device. 3. The seismic isolation device for a lightweight building according to claim 1, wherein the low elasticity member (5) is disposed at at least one of the upper and lower parts of the hole (4). 4. The seismic isolation device for a lightweight building according to any one of claims 1 to 3, wherein at least one of the plate-like bodies (6) and (7) is a Teflon (registered trademark) plate.