JPH0517347B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention absorbs seismic energy between the foundation of a building and a supported body supported by the foundation, thereby reducing the shaking caused by the earthquake in the supported body. This article relates to a seismic isolation damper used to minimize the size of the damper.

(b) Conventional technology Various types of seismic isolation dampers have been devised in the past, but none have yet been put into practical use.

(c) Problems to be solved by the invention It is desired that such a seismic isolation damper has a simple structure and can effectively absorb seismic energy.

In view of the above circumstances, an object of the present invention is to provide a seismic isolation damper that has a simple structure and can effectively absorb earthquake energy.

(d) Means for solving the problem That is, the present invention provides a means for solving the problem.
Two rod-shaped energy absorbers 7, 12 are provided facing each other in the vertical direction with their ends fixed to the foundation 2 or the supported body 3, and the two energy absorbers 7, 12 are provided opposite to each other in the vertical direction. , the sliding connection means 7g, 1
3, the energy absorbers 7 and 12 are connected to each other so as to be movable in the axial direction.

Note that the numbers in parentheses are for convenience to indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions in the drawings. The same applies to the column “(e)・Effect” below.

(e) Effect With the above-described configuration, the present invention operates so that, in the event of an earthquake, the energy absorbers 7 and 12 are plastically deformed between the foundation 2 and the supported body 3 to absorb seismic energy.

(f) Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a front view showing an embodiment of a seismic isolation damper according to the present invention, and FIG. 2 is a diagram showing an example of a seismic isolation damper assembly device.

As shown in FIG. 2, the building 1 has a foundation 2 and a supported body 3 supported by the foundation 2,
The supported body 3 is elastically supported on the foundation 2 by a rubber support (not shown). Basics 2
A seismic isolation damper assembly device 11 as shown in FIG. 2 is provided at an appropriate position between the support body 3 and the supported body 3.

The seismic isolation damper assembly device 11 has a base 6 provided on the foundation 2 side and a base 8 provided on the supported body 3 side, and a seismic isolation damper 5 according to the present invention is installed between the bases 6 and 8. A plurality of them are provided in such a way that they are connected. As shown in FIG. 1, the seismic isolation damper 5 includes an energy absorber 7 formed in a rod shape,
12 are provided in such a manner that they face each other, and the energy absorber 12 has its lower end 12a fixed to the base 6, that is, the foundation 2, through a hole 6a drilled in the base 6. Energy absorber 1
2, a cylindrical guide cylinder 13 is attached to the upper end in the figure, and a cylinder 13a is formed in the guide cylinder 13 in the vertical direction in the figure.

The upper end 7f of the energy absorber 7 is fixed to the base 8, that is, to the supported body 3 through a hole 8c drilled in the base 8. A sliding portion 7g is formed at the lower end. The sliding portion 7g has expanded portions 7h, 7h formed at a predetermined distance apart, and the sliding portion 7a connects to the cylinder 13a via the expanded portions 7h.
The energy absorbers 7 and 12 are fitted into each other so as to be slidable in the directions of arrows A and B, that is, in the axial direction of the energy absorbers 7 and 12.

Since the seismic isolation damper assembly device 11 etc. have the above configuration, in normal times, each of the seismic isolation dampers 5 of the seismic isolation damper assembly device 11 is configured as shown in FIG. 1 and FIG. The energy absorbers 7 and 12 are connected between the bases 6 and 8 via a guide cylinder 13, and are vertically installed. However, during an earthquake, relative horizontal movement occurs between the foundation 2 and the supported body 3, so the relative positional relationship between the bases 6 and 8 is
As shown in FIGS. 1 and 2, the distance L1 between the opposing holes 6a and 8c of the bases 6 and 8 that support the energy absorbers 7 and 12 is, as shown in FIGS. The larger the horizontal deviation of 8, the larger the change. Energy absorber 7, 12
Since its upper end 7f and lower end 12a are fixed to the bases 8 and 6, if the positional relationship between the bases 6 and 8 shifts, it will shift in the horizontal direction in the figure as shown by the dashed line in FIG. It moves out of place. However, the energy absorbers 7 and 12 have sliding parts 7g
Since they are slidably engaged in the axial direction via the guide cylinder 13, even if the distance L1 fluctuates, the sliding portion 7g moves within the cylinder 13a in the directions of arrows A and B. It is absorbed by On the other hand, each energy absorber 7, 12
Plastic deformation occurs in the form of yielding from around the holes 8c and 6a, and seismic energy is absorbed at that time.

The guide cylinder 13 may have a structure in which the energy absorber 7 is engaged with a simple cylindrical cylinder 13a as shown in FIG. Naturally, it is also possible to enclose oil 13c to provide a damping effect.

In addition, in the above-mentioned embodiment, the sliding part 7g has the expansion part 7.
The sliding portion 7g may have any shape as long as it can be slidably engaged with the cylinder 13a, for example, it may have a cylindrical piston shape. Of course it's a good thing.

(g) Effects of the Invention As explained above, according to the present invention, two rod-shaped energy absorbers 7 and 12 are placed between the foundation 2 and the supported body 3 with their ends connected to the foundation 2 or the supported body 3. The two energy absorbers 7, 12 are fixed to the support body 3 and are provided facing each other in the vertical direction.
Since the energy absorbers 7 and 12 are connected to each other so as to be movable in the axial direction through sliding connection means such as the guide cylinder 13 and the sliding portion 7g, seismic energy is absorbed by the energy absorbers. 7,1
2 is effectively absorbed by yielding and plastic deformation. In addition, rod-shaped energy absorbers 7, 12
Since the structure is simple, simply installing the seismic isolation damper 5 between the foundation 2 and the supported body 3 via a sliding connection means, it is possible to provide a highly reliable seismic isolation damper 5 with few failures.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of a seismic isolation damper according to the present invention, and FIG. 2 is a diagram showing an example of a seismic isolation damper assembly device. 1... Building, 2... Foundation, 3... Supported body,
5... Seismic isolation damper, 7, 12... Energy absorber, 7g... Sliding connection means (sliding part), 13...
Sliding connection means (guide cylinder).

Claims (1)

[Scope of Claims] 1. A seismic isolation damper installed between the foundation of a building and a supported body supported by the foundation to absorb seismic energy during an earthquake, comprising: , two rod-shaped energy absorbers are provided vertically facing each other with their ends fixed to the foundation or the supported body, and the two energy absorbers are provided with a sliding connection means. A seismic isolation damper in which the energy absorbers are connected to each other so as to be movable in the axial direction.