JP2000240318A - Seismic isolation / damping system - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To suppress the acceleration of a structure extremely effectively when the structure shakes due to an earthquake or wind. SOLUTION: In addition to combining a seismic isolation device M and a vibration damping / damping damper 1, an on-off valve 14,
On / off control-type bypass pipes 7, 15 and 16,
8 and 9 were provided, and the on / off valves 14, 15, and 16 were controlled on and off by the computer U. Due to the synergistic effect of the seismic isolation device M and the vibration control / damping damper 1, the response acceleration of the structure becomes smaller, and the vibration of the structure can be suppressed extremely effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation / vibration control system for suppressing the effects of a structure sway due to an earthquake or wind.

[0002]

2. Description of the Related Art In structures requiring earthquake resistance and vibration control, especially in evacuation structures, computer centers, museums, art galleries, etc., in order to suppress the effects of shaking due to an earthquake or wind, Equipment for seismic isolation or vibration control is provided. Conventionally, in this case, either a device for seismic isolation only or a device for seismic control only has been used.

[0003] As a seismic isolation device, there is known a device in which a thin steel plate and a rubber sheet are superposed in several layers so that shaking of the ground caused by an earthquake is dissipated. On the other hand, as a device for vibration control, passive vibration control using a damper function has been widely used. This is defined by a piston fitted into the cylinder.
The two cylinder chambers are filled with a viscous fluid, and a bypass passage is provided for communicating the two cylinder chambers. By adjusting the opening of an orifice valve provided in the bypass passage, the rigidity and damping performance of the damper can be reduced. It is configured to set to a desired value.

[0004]

However, the effect that can be expected in the case of the seismic isolation device is an effect of reducing the shaking by about several tens percent, and when the structure is shaken by an earthquake or wind, the effect of the structure is reduced. There are limits to reducing acceleration.

[0005] On the other hand, when it is intended to control the vibration of a structure using the damper having the above-mentioned conventional structure, a control device for finely controlling the opening of the orifice valve is required to obtain desired damper characteristics. However, there is a problem that the price is high and a failure is easily caused.

[0006] It is therefore an object of the present invention to provide a seismic isolation / vibration control system which can solve the above-mentioned problems in the prior art.

[0007]

In order to solve the above-mentioned problems, the present invention combines a seismic isolation and a vibration control, and provides a damper for the vibration control with an on / off control type bypass pipe by an on-off valve. The on / off valve is controlled on and off by a computer.

According to the invention of claim 1, the seismic isolation of the structure
A vibration control system, comprising: a seismic isolation device provided at a lowermost layer or an intermediate layer of the structure, and a rigidity / damping variable damper provided as a vibration damping device above a location where the seismic isolation device is installed. A damping damper in which a variable damper fills two viscous fluids into two cylinder chambers defined by pistons fitted in the cylinders, and a bypass passage means is provided between the two cylinder chambers; The bypass passage means turns on and off the communication between the two cylinder chambers by a plurality of bypass pipes communicating between the two cylinder chambers and the corresponding bypass pipes respectively provided in the plurality of bypass pipes. A seismic isolation / damping system is proposed, which is provided with an opening / closing valve for use.

Here, the seismic isolation device is composed of (1) a sliding bearing,
(2) Sliding bearing + laminated rubber, (3) Elastic sliding bearing,
Any one of (4) elastic sliding bearing + laminated rubber, (5) laminated rubber + damper, and (6) high attenuation laminated rubber can be used.

Further, in the above configuration, the effective passage areas of the bypass pipes are different from each other, and the sum of the effective passage areas when turned on is 2 ⁿ (where n is the number of bypass pipes). As described above, the cross-sectional area of the bypass pipe may be changed.

Further, it is also possible to adopt a configuration in which sensors are installed at the lower part of the seismic isolation device and on the floor of the vibration damping device, and the on / off of the on-off valve of the damper is controlled by a computer to dampen the structure. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a view showing an example of an embodiment of a concrete structure provided with a seismic isolation / vibration control system according to the present invention. In FIG. 1, F is a frame, B is a brace, and C is a floor. A plurality of seismic isolation devices M are installed between the ground E and the floor C. Each seismic isolation device M has a known configuration in which a thin steel plate and a rubber sheet are stacked in layers. Further, a vibration control / vibration damper 1 is mounted between the frame F and the brace B, and these are all mounted above the brace B.

FIG. 2 is a sectional view of the vibration damper 1 shown in FIG. In the vibration damping / damping device 1, a known viscous fluid 6 is filled in two cylinder chambers 4 and 5 defined by a piston 3 fitted in a cylinder 2. A plurality of bypass pipes are provided between the five pipes. In the present embodiment, three bypass pipes 7, 8, and 9 having the same sectional area and the same thickness are provided independently of each other. The bypass pipe 7 is liquid-tightly connected to the cylinder 2 by a known means so that one end 7A communicates with the cylinder chamber 4 and the other end 7B communicates with the cylinder chamber 5. Each end 8A, 9A of the bypass pipes 8, 9 and the other end 8
Similarly, B and 9B are connected to the cylinder 2 in a liquid-tight manner.

A pair of piston rods 10, 11 connected to the piston 3 project from through holes 12A, 13A provided in the corresponding cylinder side walls 12, 13. Here, the piston rod 10 and the through hole 12A
, And between the piston rod 11 and the through hole 13A, a known liquid-tight seal (not shown) is provided, so that the viscous fluid 6 does not leak from the through holes 12A, 13A. .

Therefore, when the piston 3 moves in the cylinder 2, the bypass pipe 7,
The viscous fluid 6 can flow from inside the cylinder chamber 4 into the cylinder chamber 5 or from inside the cylinder chamber 5 into the cylinder chamber 4 via 8, 9.

In order to control the above-mentioned flow of the viscous fluid 6 generated in the bypass pipes 7, 8, 9 respectively, on-off valves 14, 15, 16 are provided in the middle of the bypass pipes 7, 8, 9 respectively. . These on-off valves 14, 15, 1
6 is a viscous fluid 6 in the corresponding bypass pipe.
To allow or stop the flow of air, that is, to control whether or not the bypass pipe connects the cylinder chamber 4 and the cylinder chamber 5 to each other. It can be configured using.

Since the vibration damper 1 is constructed as described above, for example, in FIG. 1, the cylinder 2 is placed under the frame of the structure, and the piston rods 10 and 11 are placed on the brace B of the structure. The vibration damping / damping damper 1 can be attached between the frame F and the brace B by fixing them with known appropriate means. Thus, when the structure shakes due to, for example, an earthquake or the like, the vibration damping / damping damper 1 is provided between the frame F and the brace B.
The suppression force against the sway according to the rigidity and the damping performance set in the above works, and the sway of the structure can be reduced.

Here, the vibration control / vibration damper 1 has a communication function between the cylinder chamber 4 and the cylinder chamber 5 by the corresponding bypass pipes 7, 8, 9 by opening and closing the on-off valves 14, 15, 16. Selectively turn on and off, which allows
The configuration is such that the rigidity and the damping performance of the vibration damper 1 are changed stepwise. Therefore, these on-off valves 14,
As compared with the conventional configuration in which the opening degree of the valve can be continuously changed, the configuration of the components 15 and 16 can be reduced in cost because the configuration can be simplified. Further, since the characteristics are changed stepwise, required characteristics can be set more reliably and accurately than those provided with an orifice or the like, and skill is not required. Furthermore, the structure is simple, so that a failure or the like hardly occurs, there is an advantage that maintenance is simple and a long life can be expected.

In the above embodiment, the on-off valve 14,
Although the same bypass pipes are used as 15 and 16, a plurality of bypass pipes are not necessarily required to be the same, and a wider range of settings can be set by providing various effective passage areas. Will be possible. For example, each effective passage area of the bypass pipe is different from each other, and
The cross-sectional area of the bypass pipe can be changed so that the sum of the effective passage areas when turned on is 2 ⁿ (where n is the number of bypass pipes). In this case, if the ratio of the effective passage areas of the on-off valves 14, 15, 16 is 1: 2: 4, the characteristics can be set in eight stages using three bypass pipes.

Returning to FIG. 1, a computer U for controlling the opening and closing of the on-off valves 14, 15, 16 of the vibration damping / vibration damper 1 is provided on the floor C. Sensors S1 to S3 for detecting acceleration)
Is connected. Computer U has sensors S1 to S3
, The acceleration of each part when the structure shakes is detected, and the on-off valves 14, 15, and 16 of the damping / vibration damper 1 are controlled according to a predetermined program so as to reduce the acceleration. Opening / closing is controlled. As a result, the rigidity and damping performance of the damping / vibration damper 1 are set to optimal values, and the vibration of the structure can be effectively suppressed by the damping / damping damper 1.

According to the configuration shown in FIG. 1, since a plurality of seismic isolation devices M are provided between the ground E and the floor C, the vibration given to the structure by the seismic isolation device M can be reduced. The rigidity and damping performance of the damping / damping device 1 are set to optimal values, and the vibration of the structure can be effectively suppressed by the damping / damping device 1. The response acceleration of the structure becomes smaller, and the vibration of the structure can be suppressed extremely effectively.

FIG. 1 shows an example of the embodiment of the present invention. However, the embodiment of the present invention is not limited to this, and various embodiments can be considered. Examples of other embodiments according to the present invention are shown in FIGS. FIG. 3 shows an example in which the vibration damper 1 is mounted between the lower end of the brace B and the frame F and between the lower end of the brace B and the floor C.

FIG. 4 shows the upper and lower sides of the frame F and the frame F
This is an example in which a pair of braces B1 and B2 are provided between a floor and a floor C, respectively, and the vibration damper 1 is mounted between the braces B1 and B2.

FIGS. 5 to 7 show examples of installation in the case where the vibration damper 1 shown in FIG. 2 is mounted on the earthquake-resistant wall of a structure. FIG. 5 shows an example in which the frame is mounted between the upper end of the erected earthquake-resistant wall W and the frame F. In contrast, FIG.
Shows an example in which the vibration control / damping damper 1 is mounted between the lower end of the suspended wall W and the frame F, and between the lower end of the wall W and the floor C. FIG. 7 shows a pair of earthquake-resistant walls W on the upper and lower sides of the frame F, and on the frame F and the floor C.
1 and 2 are provided facing each other, and a vibration control / vibration damper 1 is mounted between these earthquake-resistant walls W1 and W2.

FIG. 8 shows an example in which the vibration damper 1 is mounted on a pillar. In FIG. 8, the vibration control / damping damper 1 is mounted in the middle of each column P.

As described above, the vibration damping / vibration damper 1 can be appropriately attached to various structures requiring earthquake resistance and vibration damping.

[0028]

According to the present invention, as described above, the seismic isolation device and the variable stiffness / damping damper for damping are used in combination. The acceleration becomes smaller, and the vibration of the structure can be suppressed very effectively. The variable stiffness / damping damper has a configuration in which a desired damper characteristic can be set by turning on / off the on-off valve. Therefore, the control is simple, the cost is low, and a failure hardly occurs. Also, if the on-off valve is controlled by a computer, the swing of the structure can be extremely easily minimized.

[Brief description of the drawings]

FIG. 1 is a view schematically showing an example of an embodiment in which a seismic isolation / vibration control system according to the present invention is provided on a concrete structure.

FIG. 2 is a sectional view of the vibration damping / damping damper shown in FIG. 1;

FIG. 3 is a diagram schematically showing another configuration example in a case where the vibration control / damping damper shown in FIG. 1 is mounted on a brace of a structure.

FIG. 4 is a diagram schematically showing another configuration example in a case where the vibration damping / damping damper shown in FIG. 1 is mounted on a brace of a structure.

FIG. 5 is a diagram schematically showing a configuration example in a case where the vibration damping / vibration damper shown in FIG. 1 is mounted on an earthquake-resistant wall of a structure.

FIG. 6 is a diagram schematically showing another configuration example in a case where the vibration damping / vibration damper shown in FIG. 1 is mounted on an earthquake-resistant wall of a structure.

FIG. 7 is a diagram schematically showing another configuration example in a case where the vibration damping / damping damper shown in FIG. 1 is mounted on an earthquake-resistant wall of a structure.

FIG. 8 is a diagram schematically showing a configuration example in a case where the vibration control / damping damper shown in FIG. 1 is mounted on a pillar.

[Explanation of symbols]

 Reference Signs List 1 damping / vibration damper 2 cylinder 3 piston 4, 5 cylinder chamber 6 viscous fluid 7, 8, 9 bypass pipe 14, 15, 16 opening / closing valve B brace C floor E ground F frame M seismic isolation device S1-S3 sensor U Computer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F16F 15/04 F16F 15/04 A

Claims (1)

[Claims] 1. A seismic isolation / vibration control system for a structure,
A seismic isolation device is provided on the lowermost layer or middle layer of the structure, and a variable stiffness / damping damper is provided as a vibration damping device above the installation location of the seismic isolation device, and the variable stiffness / damping damper is a cylinder. A vibrating fluid filled in two cylinder chambers defined by pistons fitted therein, and a bypass passage means provided between the two cylinder chambers, wherein the bypass passage means is provided. Comprises a plurality of bypass pipes for communicating between the two cylinder chambers, and an on-off valve provided on each of the plurality of bypass pipes for turning on and off the communication between the two cylinder chambers by a corresponding bypass pipe. A seismic isolation / vibration control system characterized by being composed of: