JPH0544513B2 - - 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, and absorbs earthquake energy generated in the supported body. This invention relates to a seismic isolation damper used to minimize shaking.

(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 In other words, in the seismic isolation damper 5 installed between the foundation 2 of the building and the supported body 3 supported by the foundation to absorb seismic energy during an earthquake. , a rod-shaped energy absorber 7 is attached to the foundation or supported body.
is installed vertically with one end thereof fixed to the foundation or supported body, and a cylinder 12a is formed and installed on the supported body or foundation opposite to the foundation or supported body to which the energy absorber is fixed. A plurality of sliding bodies 7g and 7h are provided at the other end of the energy absorbing body at predetermined intervals in the axial direction of the energy absorbing body, and the energy absorbing body is attached to the cylinder and the plurality of sliding bodies are disposed at a predetermined interval. They are configured to be fitted and engaged so as to be slidable in the axial direction.

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

(e) Effect With the above-mentioned configuration, the present invention allows the energy absorber 7 to slide the expansion bodies 7g and 7h in the axial direction within the cylinder 12a, while maintaining the relationship between the foundation 2 and the supported body 3 in the event of an earthquake. It acts to absorb seismic energy by plastically deforming between the two.

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

Fig. 1 is a front view showing one embodiment of a seismic isolation damper according to the present invention, Fig. 2 is a front view showing an example of a seismic isolation damper assembly device, Fig. 3 is a plan view of Fig. 2, and Fig. 4 is a front view showing an example of a seismic isolation damper assembly device. It is a front view which shows another Example of this invention.

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
As shown in FIGS. 2 and 3, a seismic isolation damper assembly device 11 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 FIGS. 2 and 3, the seismic isolation damper 5 has a guide cylinder 12 formed in a rectangular cylindrical shape and fixed to the base 6 via its outer periphery.
A cylinder 12a is formed inside the cylinder 12a in a vertical direction in FIG. An energy absorber 7 made of a rod-shaped material with a circular cross section is fitted into the cylinder 12a through a sliding portion 7f formed at its tip so as to be slidable in the directions of arrows A and B in FIG. The sliding portion 7f has expansion bodies 7g and 7h having a circular cross section and spaced apart from each other by a predetermined distance L1.

As shown in FIG. 1, the main body 7i of the energy absorber 7 extends upward in the direction of the base 8 in the figure, and its tip extends further upward through a hole 8c penetrated through the base 8. There is. A screw 7j is screwed onto the tip of the main body 7i, and a nut 1 is attached to the screw 7i.
3 and 13 are screwed together to fix the main body 7i to a bracket 8d formed on the base 8.

Since the seismic isolation damper assembly device 11 etc. have the above configuration, in normal times, each seismic isolation damper 5 of the seismic isolation damper assembly device 11 has a main body as shown in FIGS. 1 and 2. 7i is installed to connect the bases 6 and 8 and to stand vertically. 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
Figures 1 and 2 shift in the left and right direction, each base 6,
Distance L2 between guide cylinder 12 of 8 and hole 8C
Also changes in such a way that the larger the deviation between the bases 6 and 8 in the left-right direction, the larger the difference. On the other hand, since the upper end of the energy absorber 7 is fixed to the bracket 8d of the base 8, if the positional relationship between the bases 6 and 8 shifts, the energy absorber 7 will move as shown in the dashed and dotted lines in FIG. It shifts in the middle and left and right directions. However, the lower end of the energy absorber 7 is connected to the cylinder 12a of the base 6 via the expansion bodies 7g and 7h of the sliding portion 7f.
1, so that the sliding portion 7f is engaged with the cylinder 1 in the direction of arrows A and B.
Distance L2 between bases 6 and 8 by sliding within 2a
absorb fluctuations in In other words, even if the distance L2 changes,
The sliding portion 7f of the energy absorber 7 is slidable vertically within the cylinder 12 by expansion bodies 7g and 7h provided at a predetermined interval L1 in the vertical direction in the figure, which is the axial direction of the absorber 7. Since it is held, the absorber 7 absorbs fluctuations in the distance L2 by moving the sliding portion 7f in and out of the cylinder 12a. Therefore, harmful axial force acting in the axial direction of the energy absorber that would tend to peel off the fixed end side of the absorber is prevented as much as possible. Therefore, the energy absorber 7 whose upper end is fixed in the figure behaves as a member whose upper and lower ends are fixed against vibration in the horizontal direction.
and 2 in the figure near the upper end of the guide cylinder 12 in the figure.
Plastic deformation occurs in the form of yielding at certain points, which absorbs seismic energy.

In addition, although the above-mentioned example described the case where the supported body 3 side of the energy absorber 7 is fixed and the foundation 2 side is supported slidably in the vertical direction, the support mode of the energy absorber 7 is as follows. Of course, it is also possible to do the opposite of the above, that is, to fix the base 2 side and support the supported body 3 side movably in the vertical direction.

In addition, the guide cylinder 12 has a structure in which the energy absorber 7 is engaged with a simple cylindrical cylinder 12a as shown in FIG. 1, and an oil chamber 12b in the cylinder 12a as shown in FIG. Of course, it is also possible to form a damping effect by sealing the oil 12c in the oil chamber 12b.

(g) Effect of the Invention As explained above, according to the present invention, the structure is installed between the foundation 2 of a building and the supported body 3 supported by the foundation to absorb seismic energy during an earthquake. In the seismic isolation damper 5, a rod-shaped energy absorber 7 is installed vertically on the foundation or the supported body with one end thereof fixed to the foundation or the supported body, and the energy absorber is fixed. A cylinder 12a is formed and installed on a supported body or foundation facing the foundation or supported body, and a plurality of sliding bodies such as expansion bodies 7g and 7h are installed at the other end of the energy absorbing body at predetermined intervals to absorb energy. Since the energy absorber is provided in the axial direction of the body, and the energy absorber is fitted and engaged with the cylinder so as to be slidable in the axial direction via the plurality of sliding bodies, seismic energy is absorbed by the energy absorber 7. is effectively absorbed by yielding and plastic deformation. Moreover, since the structure is simple, just installing the rod-shaped energy absorber 7 between the foundation 2 and the supported body 3, it is possible to provide a highly reliable seismic isolation damper 5 with few failures.

In addition, one end of the energy absorber is fixed to the foundation or the supported body, and the other end is held slidably in the axial direction within the cylinder by a plurality of sliding bodies, so the energy absorber can be fixed in the horizontal direction. While acting as a both-end supporting member as a whole against vibration, the energy absorber is prevented as much as possible from exerting harmful force that would try to tear off the fixed end of the absorber in the axial direction of the energy absorber during plastic deformation. Plastic deformation of the body occurs in two places: near the base of the energy absorber or the fixed part with the supported body, and near the cylinder, such as right above the cylinder in FIG. Therefore, the absorption efficiency as a seismic isolation damper can be significantly improved to approximately twice that of a case where the energy absorber is cantilever-supported, in which plastic deformation occurs only at one fixed portion.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of a seismic isolation damper according to the present invention, FIG. 2 is a front view showing an example of a seismic isolation damper assembly device, FIG. 3 is a plan view of FIG. 2, and FIG. FIG. 3 is a front view showing another embodiment of the present invention. 1... Building, 2... Foundation, 3... Supported body,
5... Seismic isolation damper, 7... Energy absorber.

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: A rod-shaped energy absorber is installed vertically with one end fixed to the foundation or supported body, and a cylinder is installed on the supported body or foundation opposite to the foundation or supported body to which the energy absorber is fixed. A plurality of sliding bodies are provided at the other end of the energy absorbing body at predetermined intervals in the axial direction of the energy absorbing body, and the energy absorbing body is mounted on the cylinder, and the plurality of sliding bodies are disposed on the cylinder. A seismic isolation damper constructed by fitting and engaging each other so as to be able to slide freely in the axial direction.