JPH02153140A - Vibration-proof, vibration-controlling device - Google Patents

Abstract

PURPOSE:To reduce seismic force by installing a sliding bearing body, with a sliding bearing board fixed thereto, between a column base and a foundation with surroundings of the bearing board and the foundation sealed up, and by connecting a fluid pressurizer, which makes a forcible inflow of the pressurized fluid into the sealed-up space. CONSTITUTION:Seismic movement is detected by an accelerometer 15, displacement gauge 16 installed to a column base 1, and accelerometer 17 provided to a foundation 2 and a pressure gauge 18 installed to a sliding bearing board 3a of a sliding bearing body 3, and detected signals are sent to a control device 19. The control device 19 controls a compressor of a fluid pressurizer 13, making the pressurized oil flow into a sealed-up space 12 and makes the building weight partially sustained thereby. As the force applied to the contact surface of the sliding bearing body 3 is relieved thereby, the seismic force is reduced.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a seismic isolation and damping structure for structures.

(Prior art) Figure 2 shows a conventional sliding bearing type seismic isolation and damping structure, in which a sliding bearing (
C) is interposed, and the stainless steel plate (d) layered on the F side of the foundation (h) is interposed with the lower sliding support plate (fluororesin layered on the lower surface of Φ) in the sliding support body (C). A board (Teflon board) (e) is slidably mounted, and a building beam (
A horizontal reaction force mechanism (h) made of laminated rubber is interposed between f) and the eight underground beams (g).

In the figure, (+) is a column and 0) is a floor.

(Problem to be solved by the invention) The coefficient of friction between the stainless steel layered on the surface of the foundation and the fluororesin plate (Teflon plate) layered on the lower surface of the sliding support plate is about 0.1. Therefore, the seismic force acting on the building is about 0.1 times the weight of the building, and unless the coefficient of friction is reduced, tI! ! The seismic force cannot be lower than this.

However, since there is currently no material that constitutes a stable friction surface and has a friction coefficient smaller than this, as long as the conventional seismic isolation and restraint methods are adopted, the seismic force cannot be reduced below this.

Also, when the seismic force tries to exceed the frictional force, the building begins to slide, and when the seismic motion and the movement of the building coincide, the sliding stops.

Therefore, it is not possible to control the sliding direction or displacement of the building,
There is a habit of excessive sliding displacement and residual sliding displacement occurring.

Furthermore, when there are multiple supports between a building and the foundation, the load on each support is not necessarily constant, and the ground pressure of each support varies due to the overturning moment of the building due to earthquake force. Therefore, during the duration of the seismic motion, an imbalance of frictional force occurs between each support, and as a result, the building tends to undergo torsional displacement due to slipping.

The present invention was proposed in view of the problems of the prior art, and its objectives are to reduce seismic force, avoid excessive displacement and residual displacement, and prevent torsional displacement. The point is to provide earthquake and restraining equipment.

(Means for Solving the Problem) In order to achieve the above object, the seismic isolation and restraint device according to the present invention has a structure in which a sliding support and a reaction force mechanism are interposed between the column base and the foundation. In the seismic isolation and damping structure of objects, a sliding support to which a concave sliding support plate with an open bottom is fixed is installed between the column base and the foundation, and the surroundings of the sliding support plate and the foundation are It is constructed by connecting a fluid pressurizing device that seals and seals pressurized fluid into the seal space formed between the recess of the sliding support plate and the foundation.

In order to automatically control the fluid pressurization device in accordance with the magnitude and direction of an earthquake, the device of the present invention includes a seismic motion sensor member disposed in the structure, and a seismic motion sensor member attached to the sensor member. A control device is connected thereto to control the fluid pressurizing force of the pressurizing device in response to an earthquake motion detection signal from the pressurizing device.

(Function) Since the present invention is configured as described above, when an earthquake occurs, the fluid flows into the seal space formed between the recess in the concave sliding support plate fixed to the sliding support and the foundation. Pressurized fluid is rapidly injected by a pressurizing device, and the pressure of the pressurized fluid supports part or most of the weight of the structure, thereby reducing seismic force on the structure.

In addition, during the duration of the earthquake, the fluid pressure by the fluid pressurizing device is controlled depending on the scale of the earthquake and the direction of vibration, and the damping force due to the frictional force of the sliding support and the sliding direction and displacement of the sliding support are controlled. It controls the

(Example) The present invention will be described below with reference to an embodiment shown in FIG.

A sliding support plate (3a) with a concave opening at the bottom is fixed between the column base (1) and the foundation (2) of a building.
3) is interposed, and a stainless steel plate (4) is layered on the E surface of the foundation (2). A fluororesin plate (Teflon plate) (5) is layered on the lower surface of the sliding support plate (3a) on E. is slidably mounted, and between the building beam (6) and the underground beam (7),
A horizontal reaction force mechanism (8) made of laminated rubber is interposed.

In the figure, (9) is a column, and (0il) is a floor.

A sealing material (11) is used to seal between the sliding support plate (3a) and the outer periphery surrounding the recess, and the sealing material (11) connects the sliding support plate (3a) to the foundation (2). ) A fluid pressurizing device such as a compressor is connected to the seal space 02) formed between the pipe Oa and the sealing space 02) via a conduit Oa.

Further, an accelerometer θ and a displacement meter 00 are attached to the column base (1), and an accelerometer 0'I) is attached to the foundation (2), and furthermore, an accelerometer θ and a displacement meter 00 are attached to the base (2), and furthermore, at a position facing the recess in the sliding support plate (3a). The pressure gauge side is attached. 00 plane of each of the above-mentioned accelerometers,
The displacement gauge 06) and the pressure gauge 08) constitute the seismic motion sensor member.

The seismic motion detection signal of the seismic motion sensor member is sent to the control device 09.
), and the fluid pressurizing force of the pressurizing device 0 is controlled by the control device 0.

Since the illustrated embodiment is configured as described above, seismic motion is detected by each of the accelerometers 07), displacement gauges 00, and pressure gauges 00, and detection signals are sent to the control device 0! The control device 09) processes the input signal and controls the compressor that constitutes the fluid pressurizing device to obtain the most appropriate oil pressure, and the pressurized oil is sent to the seal space 0. The pressurized oil in the same space 021 supports part of the weight of the building, reducing the force acting on the contact surface of the sliding bearing and reducing seismic force.

In addition, by adjusting the hydraulic pressure in the seal space of each bearing during an earthquake, the force acting on the contact surface of each bearing can be adjusted, controlling the magnitude and direction of slippage, and preventing excessive displacement and residual Displacement 7 can be avoided and torsional displacement can be prevented.

In the above embodiments, oil is used as the pressurized fluid, but other liquids such as air or water may be used.

Alternatively, the seal space 01 may not be pressurized all the time, but when seismic motion is detected by the accelerometer 01, the inside of the sealed space 01 may be suddenly pressurized by a pressurizing device surface using explosives or the like used in airbags.

Next, examples of application of the present invention will be given.

A sliding bearing is provided for each pillar, and the load per position is approximately 1501f. When using a bearing with a diameter of 70C11, the pressure on the contact surface is 150 x lO3/(35 x 35
X x )=39.0 kgf/c-.

If the diameter of the concave part of the support plate is 50 cm, 3/ of the total load is
The hydraulic pressure required to receive 4 with the hydraulic pressure in the seal space is 150 XIO x 3 / 4 / (25 x 25
π) = 57, 3 kg f/c-.

This is a pressure that can be fully achieved using hydraulic pressure.

According to the above example, the seismic force acting on the building is (building weight)
It is reduced to X l /4 Xo, 1, that is, 0.025 times the building weight.

(Effects of the Invention) According to the present invention, as described above, the periphery of the foundation and the concave sliding support plate with an open lower surface fixed to the sliding support body is sealed, and the area between the foundation and the sliding support plate is sealed. By connecting a fluid pressurizing device that rapidly seals pressure fluid into the seal space formed between the recess, it becomes possible to support the weight of the structure by the fluid pressure in the seal space, and the structure The seismic force against is reduced.

In addition, during the duration of an earthquake, the fluid pressure in the seal space by the fluid pressurizing device is controlled depending on the magnitude and vibration direction of the earthquake, thereby reducing the damping force due to the frictional force of the sliding bearing and the sliding bearing. By controlling the sliding direction and displacement of the structure, excessive displacement and residual displacement of the structure can be avoided, and torsional displacement can be prevented.

Further, according to the seismic isolation and restraint device of the present invention, a concave sliding support plate with an open bottom is attached to the lower surface of the sliding support in advance, and a seal is established between the sliding support plate and the foundation, so that the sliding bearing By configuring a seal space in which pressure fluid is sealed between the plate and the foundation, the configuration can be simplified and construction can be facilitated.

The invention according to claim 2 provides a seismic motion sensor member disposed in a structure, and a control device that receives a seismic motion detection signal from the sensor member and controls the fluid pressurizing force of the pressurizing device. Pressure fluid is automatically sealed in the seal space formed between the recess of the sliding support plate and the foundation in the bearing part, and the pressurizing force of the pressure fluid is automatically applied depending on the magnitude of the earthquake and the direction of vibration. It is designed to be controllable.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing an embodiment of a seismic isolation and restraint device according to the present invention, and FIG. 2 is a vertical cross-sectional view of a conventional seismic isolation and restraint device. (]) - one pillar base, (3) - - sliding support, (8) - one water reaction force mechanism, 02) - seal space, 051 - one accelerometer, 07) - m - accelerometer, 01--Control device. Agent Patent attorney Shige Okamoto Two other people (2) - Foundation, (3a) - Sliding support plate, 01) - Seal material, 031 - Fluid pressurization device, 0θ - Displacement meter, 08) -1 pressure gauge,

Claims (2)

[Claims] (1) In seismic isolation and damping structures for structures in which a sliding support and a reaction force mechanism are interposed between the column base and the foundation, a concave sliding structure with an open bottom is installed between the column base and the foundation. A sliding support to which a support plate is fixed is installed, and the area around the sliding support plate and the foundation is sealed, and a pressurized fluid is sealed in the seal space formed between the recess of the sliding support plate and the foundation. A seismic isolation and damping device characterized by being connected to a fluid pressurization device. (2) A claim in which a seismic motion sensor member is disposed in the structure, and a control device is connected to the sensor member for receiving a seismic motion detection signal from the member and controlling the fluid pressurizing force of the pressurizing device. Seismic isolation and damping device described in Section 1.