JPH0372783B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a vibration damping device for buildings.

[Prior art and problems to be solved by the invention]

Generally, when a building vibrates due to an earthquake or wind, it generates vibrational energy, and if this vibrational energy is large enough, the building may be destroyed.

Traditionally, buildings have been designed to resist this type of vibrational energy solely through their strength. However, this would require the cross sections of the columns and beams to be considerably large, which is not a good idea from both a functional and economic point of view.

For this reason, recently, seismic isolation construction methods have been put into practical use that prevent the transmission of seismic forces to buildings as much as possible. In addition, for high-rise buildings where it is difficult to apply seismic isolation methods, devices have been developed that absorb vibration energy within the building (see Patent No. 1577568).
Seismic damping construction methods are being put into practical use.

This invention was proposed in view of these circumstances, and by dramatically increasing the damping ability of the patented device described above, it can quickly absorb vibration energy caused by vibrations of buildings caused by earthquakes and wind. The object of the present invention is to provide a high-performance vibration energy absorption device for buildings (hereinafter referred to as a vibration control device) that can prevent the destruction of buildings.

[Means for solving problems]

In this invention, a resistance plate is inserted into a wall plate of a container filled with a highly viscous fluid, and one side of the resistance plate is used as a pin support point serving as a center of rotation, and the resistance plate causes rotational movement due to relative movement between the upper and lower layers. The above object is achieved by amplifying the relative motion between the container side wall plate and the resistance plate, thereby generating a large damping performance even for minute vibrations.

〔Example〕

The present invention will be explained below with reference to an illustrative embodiment.

In Figures 1, 2, and 3, three first resistance plates 3, 3 are placed in parallel and at a constant rate within a frame composed of reinforced concrete columns 1, 1 and beams 2, 2. They are built at intervals, and their lower ends and both left and right ends are completely sealed.

A highly viscous fluid 4 such as a hydrocarbon-based fluid material of about 60,000 poise is filled between the first resistance plates 3 .

Two fan-shaped second resistance plates 5, 5 are built into the highly viscous fluid 4 between the first resistance plates 3, 3.

The second resistance plates 5, 5 are rotatably supported at the upper ends of the first resistance plates 3, 3 by pins 6 at the upper ends of the second resistance plates 5, 5, and furthermore, the upper ends are attached to the beams on the floor immediately above. It is rotatably pin-jointed to the central part of the body by a pin 7. Furthermore, exterior panels 1 are provided on both sides of the first resistance plates 3, 3 and the second resistance plates 5, 5.
3, 13 are attached, and the first resistance plates 3, 3 and the second resistance plates 5, 5 are embedded in the wall.
In this configuration, when the building vibrates due to earthquake force or wind, the vibration energy (relative velocity generated between the layers) is transmitted to the upper end of the second resistance plates 5, 5, and It is amplified by the vibration centered on pin 6.

Then, the second resistance plates 5, 5 and the first resistance plates 3, 3
The amplified relative velocity difference between the two plates creates a shear resistance force due to the action of the highly viscous fluid present between the two plates.

As a result, the vibration energy generated when the building vibrates due to earthquakes or wind is quickly attenuated.

This damping force can be adjusted by the number and area of the first and second resistance plates 3 and 5 and the installation interval between the first and second resistance plates 3 and 5.

Generally, the viscous damping force Q can be expressed by the following formula: Q=A·(dv/dy). Here, A is the area of the resistor plate
dv is the relative velocity, dy is the gap between the resistor plates, and α is the coefficient determined by experiment.

4 to 6 show a second embodiment of the present invention, in which the second resistance plate 5 is formed in the shape of a vertically long strip. The resistance plates 5 are built in the high viscosity fluid 4 between the first resistance plates 3 and 3 at regular intervals in the width direction of the second resistance plate 5, and the portion slightly above the center portion is placed between the first resistance plates 5 and 3. , 3 are rotatably supported by a pin 6, and the upper ends are rotatably supported by a pin 7 at the center of the beam 2 on the floor immediately above. Further, the lower end portions of the second resistance plates 5 are connected by a connecting plate 8.

In such a configuration, its function is exactly the same as in the first embodiment.

Furthermore, FIG. 7 shows a third embodiment of the present invention, in which a rocking plate 9 is rotatably connected to an amplification pin support plate 14 by a pin 10 at a portion slightly above the center thereof. The upper end is rotatably connected to the center of the beam 2 on the floor directly above by a pin 11, and the lower end of the rocking plate 9 is equipped with fluid dampers 12, 12 using high viscosity fluid. is installed.

In this configuration, the vibration energy of the building due to earthquakes and wind is amplified in the portion of the rocking plate 9 below the pin 10, and is attenuated by the action of the fluid dampers 12, 12.

〔Effect of the invention〕

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

The damping force is extremely high because the vibration energy of the building caused by earthquakes and wind is first amplified and then damped by the viscous shear resistance of the highly viscous fluid.

Therefore, in order to exert the same level of damping force, it is necessary to use a smaller scale than the conventional one.

Since the damping force can be adjusted over a wide range by appropriately changing the size and number of the resistance plates and the high viscosity material, the optimum damping force can be generated depending on the scale of the building.

Since the damping force is extremely large, it goes without saying that it can be used alone, and it can also be used as a damping device for seismic isolation construction methods. Furthermore, it can be used not only for buildings but also as a damping device for equipment, civil engineering, works, etc., and is extremely versatile and highly practical.

This makes it possible to design buildings much more economically than buildings designed using conventional seismic design methods.

Since the entire device is installed inside the wall of the building, it is easy to install and has extremely good workability.

[Brief explanation of drawings]

Figures 1 to 7 show embodiments of the present invention, Figures 1 to 3 are the first embodiment of the invention, Figure 1 is a partial sectional view of a building, and Figure 2 is a partial cross-sectional view of a building. 3 is a cross-sectional view taken along line A-A and line B-B in FIG. 1, and FIGS. 4 to 6 are a second embodiment of the present invention,
Fig. 4 is a partial sectional view of the building, Figs. 5 and 6 are sectional views taken along lines C-C and D-D in Fig. 4, and Fig. 7 is a third embodiment of the present invention. It is a partially sectional view. 1... Column, 2... Beam, 3... First resistance plate, 4...
...High viscosity fluid, 5... Second resistance plate, 6, 7... Pin, 8... Connection plate, 9... Rocking plate, 10, 11...
...Pin, 12...Fluid damper. 13...Exterior panel, 14...Amplification pin support plate.

Claims (1)

[Claims] 1. In a container filled with a highly viscous substance installed between the upper and lower floors of a structure and fixed to the lower floor, a resistance plate fixed to the upper floor is placed so as to face the resistance plate on the container side with a certain gap between them. In a building vibration damping system that uses the relative speed difference between the upper and lower layers as the relative speed difference between both resistance plates and provides the structure with viscous damping performance proportional to the speed difference, it is used as a part of one of the resistance plates. A vibration damping device for a building, characterized in that a pin support point serving as a center of rotation is provided, and the relative movement of both resistance plates is amplified more than the relative movement between the upper and lower layers due to the rotational movement of the resistance plate.