JPH09273331A - Vibration control device for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent earthquake vibration even in a house provided with a base isolation structure or a damping structure. SOLUTION: A house foundation part 4 is transferred to the four sides in the canceling direction of the horizontal displacement of the house body 5 detected by a vibratory detecting means or the variation of the horizontal load acting on the house foundation part 4. And hence, the lateral swing by earthquake vibration transmitted from the foundation ground to the house foundation part 4 is restricted by active air dampers 6 of pneumatic servo 6a system. When the house foundation part 4 vibrates horizontally with the lateral swing, the vibration is immediately attenuated by the air dampers 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic vibration control mechanism for a building for suppressing seismic vibration transmitted from a foundation ground to a building.

[0002]

2. Description of the Related Art When an earthquake occurs and a building shakes together with the foundation ground, furniture may fall down and articles may fall, which causes a secondary disaster and is extremely dangerous. For this reason, various seismic isolation mechanisms and seismic reduction mechanisms have been conventionally proposed for detached houses. In a house equipped with this seismic isolation mechanism or a vibration reduction mechanism, the rolling applied to the house from the foundation ground when the earthquake occurs is exempted or reduced.

[0003]

However, even if such a seismic isolation mechanism or a seismic reduction mechanism is provided in a house, the building does not vibrate at all, but vibrates to some extent.
Therefore, when an earthquake with a relatively high intensity occurs, the building will be shaken accordingly. An object of the present invention is to provide a seismic vibration control mechanism for buildings that suppresses the transmission of such vibrations from the foundation ground to the building.

[0004]

In order to achieve such an object, the present invention provides a slide mechanism for reducing frictional resistance of a contact surface between a building foundation supporting a building and a foundation ground, and a horizontal displacement or foundation of the building. A seismic vibration control mechanism for a building, which includes a vibration detection means for detecting a horizontal load applied to the building from the ground, and a damper mechanism for moving the building foundation in a direction to cancel the displacement or load change detected by the vibration detection means. Configured.

Further, the damper mechanism is composed of an air damper for moving the building foundation by a pneumatic servo.

According to this structure, the damper mechanism moves the building foundation in a direction to cancel the displacement or the change in the load detected by the vibration detecting means. Therefore, the rolling due to the earthquake vibration transmitted from the foundation ground to the building foundation is suppressed. In addition, when the building foundation undergoes horizontal shaking due to rolling, the shaking is immediately attenuated.

Further, by constructing the damper mechanism by an air damper and attenuating the vibration of the building foundation by air pressure, the impact applied to the building during damping is softened.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment in which the building vibration control mechanism according to the present invention is applied to a detached house will be described. FIG. 1 is a sectional view showing the structure of the vibration damping mechanism according to the present embodiment.

On the surface layer of the ground 1, concrete 2 having a U-shaped cross section is laid, and the foundation ground is prepared. A building foundation 4 is placed on the concrete 2 via roller bearings 3. The building foundation 4 supports the building body 5. Roller bearing 3
Composes a slide mechanism that reduces frictional resistance of the contact surface between the building foundation 4 and the concrete 2, that is, a seismic isolation mechanism.

An air damper 6 is installed between the building foundation 4 and the rising portion of the concrete 2. Further, a vibration detecting means (not shown) is attached to the building foundation 4 or the building body 5. This vibration detecting means electrically detects a horizontal displacement of the building body 5 or a horizontal load applied to the building foundation 4 from the foundation ground.

The air damper 6 receives the displacement or load detected by the vibration detecting means as an electric signal, and moves the building foundation 4 in such a direction as to cancel the detected change in the displacement or load. That is, air is taken in and out of the air damper 6 by the pneumatic servo 6a according to the detection signal input from the vibration detecting means, and the spool of the air damper 6 is moved in the horizontal direction. By this movement of the spool, the end portion of the spool comes into contact with the side portion of the building foundation portion 4 and a horizontal force is applied to the building foundation portion 4.

The air dampers 6 are provided on four sides of the building foundation 4, as shown in FIG. 2 which is a top view of the vibration damping mechanism. In the figure, the same parts as those in FIG. 1 are designated by the same reference numerals. Therefore, the driving force applied to the building foundation 4 by the air damper 6 is applied from four directions, and the building foundation 4 is provided with a force against the horizontal seismic force from the entire circumference.

That is, in the seismic vibration control mechanism according to the present embodiment, the building damper 4 is moved in all directions by the air damper 6 in such a direction as to cancel the displacement or load change detected by the vibration detection means. Therefore, the rolling due to the earthquake vibration transmitted from the foundation ground to the building foundation 4 is stopped by the active air damper 6 by the pneumatic servo system. Further, when the building foundation 4 is horizontally vibrated due to rolling, the vibration is immediately damped by the air damper 6.

Further, as in the present embodiment, the damper mechanism is constituted by the air damper 6 and the vibration of the building foundation 4 is attenuated by the air pressure, so that the shock applied to the building 5 during damping is softened.

Although the slide mechanism is constituted by the roll bearing 3 in the description of the above-mentioned embodiment, the constitution of the slide mechanism is not limited to such a seismic isolation mechanism, and may be a seismic reduction mechanism. For example, a slider member having a low friction coefficient such as silicon oil or a Teflon sheet may be interposed between the building foundation 4 and the concrete 2 to reduce the contact frictional resistance between the building foundation 4 and the concrete 2. . Even when the slide mechanism is realized with such a configuration, the same effect as that of the above-described embodiment can be obtained.

[0016]

As described above, according to the present invention, the damper mechanism moves the building foundation in a direction to cancel the displacement or load change detected by the vibration detecting means. Therefore, the rolling due to the earthquake vibration transmitted from the foundation ground to the building foundation is suppressed. In addition, when the building foundation undergoes horizontal shaking due to rolling, the shaking is immediately attenuated. Therefore, it is possible to further reduce the vibrations transmitted from the foundation ground to the building, as compared with the conventional building having only the base isolation mechanism or the damping mechanism.

Further, by constructing the damper mechanism by an air damper and attenuating the vibration of the building foundation by air pressure, the shock applied to the building during damping is softened. For this reason, it becomes possible to further improve the vibration control performance of the vibration control mechanism.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a structure of a building vibration control mechanism according to an embodiment of the present invention.

FIG. 2 is a plan view of the vibration damping mechanism according to the present embodiment seen from above.

[Explanation of symbols]

 1 ... ground 2 ... concrete 3 ... roller bearing 4 ... building foundation 5 ... building body 6 ... air damper 6a ... pneumatic servo

Claims (2)

[Claims] 1. A slide mechanism for reducing frictional resistance of a contact surface between a building foundation supporting a building and a foundation ground, and a vibration detecting means for detecting a horizontal displacement of the building or a horizontal load applied to the building from the foundation ground. A vibration control mechanism for a building, comprising: a damper mechanism that moves the building foundation in a direction that cancels the displacement or load change detected by the vibration detection means. 2. The vibration control mechanism for a building according to claim 1, wherein the damper mechanism is an air damper that moves the building foundation by a pneumatic servo.