JPS63268842A - Earthquake damper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 suppressing earthquakes occurring in the supported body. This invention relates to a seismic isolation damper used to minimize vibrations in

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

(C)0 Problems to be Solved by the Invention As such a seismic isolation damper, one that has a simple structure and can effectively absorb earthquake energy is desired.

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 zero problem, that is, the present invention provides the following:
A rod-shaped energy absorber (7) is engaged vertically through both ends thereof, with one end fixed and the other end movably engaged in the axial direction through the hole (6a). At the same time, a tapered escape part (7g) whose diameter becomes smaller toward the tip is formed at the part of the energy absorber (7) that engages with the hole (6a).

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

(e) 0 effect With the above-described configuration, the present invention allows the energy absorber (7) to plastically deform between the foundation (2) and the supported body (3) and absorb seismic energy in the event of an earthquake. act.

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

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, and FIG. 3 is a plan view of FIG. 2.

As shown in FIG. 2, the building 1 includes a foundation 2 and the foundation 2.
It has a supported body 3 supported by, and the supported body 3 is
It is elastically supported on the foundation 2 by a rubber support (not shown). As shown in FIGS. 2 and 3, a seismic isolation damper assembly device 11 is provided at an appropriate position between the foundation 2 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 these are connected to each other. base 8
As shown in FIG. 1, a hole 8c is formed in the hole 8c.
A rod-shaped energy absorber 7 having a circular cross section is fitted into the hole 8c with its upper end 7f fixedly attached to the base 8 and therefore to the supported body 3. The tip of the energy absorber 7 on the side of the base 2 is a tapered relief portion 7g, and the relief portion 7g is fitted into a guide hole 6a formed in the base 6 to face the hole 8c. engaged.

Since the seismic isolation damper assembly device 11 etc. has the above configuration, in normal times, the seismic isolation damper assembly device 11 etc.
As shown in FIGS. 1 and 2, each seismic isolation damper 5 is
The guide holes 6a and holes 8c of each base 6.8 face each other, and are aligned in the vertical direction with the relief portion 7g of the energy absorber 7 fittingly engaged with the guide hole 6a from the vertical direction in FIG. It is installed in 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
The distance 11L1 between the guide hole 6a and the hole 8g of each base 6.8 increases as the horizontal displacement of the base 6.8 increases, as shown in FIG. Changes in shape.

Moreover, since the upper end 7f of the energy absorber 7 is fixed to the base 8, if the positional relationship between the bases 6 and 8 shifts, it will shift in the left and right directions in the figure as shown by the broken line in FIG. . However, since the energy absorber 7 has a tapered relief portion 7g at its lower end that is fitted into the guide hole 6a, the relief portion 7g is disposed in the axial direction of the energy absorber 7 with respect to the guide hole 6a. Slide it to the base 6
．． It absorbs the fluctuation of the distance glL1 between 8 and 8. On the other hand, the energy absorber 7 undergoes plastic deformation in the form of yielding from around 8° of the hole in the base 8, and absorbs earthquake energy at this time.

As already mentioned, the relief portion 7g is formed in such a way that its diameter gradually decreases toward the tip.
Even if the base 6.8 shifts in the left-right direction in FIG. 1 and the energy absorber 7 becomes oblique with respect to the guide hole 6a as shown by the dotted line in FIG.
The guide hole 6a of the energy absorber 7 is pulled out upward in the figure by the increase in L1, and the contact position between the guide hole 6a and the energy absorber 7 moves to a smaller diameter part of the relief part 7g. The movement between the energy absorber 7 and the guide hole 6a is performed smoothly without getting caught.

Note that in the above embodiment, the supported body 3 of the energy absorber 7
Although the case where the side of the foundation 2 is fixed and the side of the supported body 3 is supported in a slidable manner is described above, the support mode of the energy absorber 7 is the opposite of the above, that is, the side of the foundation 2 is fixed and the side of the supported body 3 is supported. Of course, it is also possible to support it in a movable manner.

(g) 0 Effects of the Invention As explained above, according to the present invention, the rod-shaped energy absorber 7 is placed between the foundation 2 and the supported body 3 in the vertical direction via both ends thereof, and one end The part is fixed, and the other end is movably engaged in the axial direction through a hole such as the guide hole 6a, and connected in a loop shape, and the part of the energy absorber 7 that engages with the hole, Since the taper-shaped escape portion 7g is formed, the diameter of which decreases toward the tip, seismic energy is effectively absorbed by the energy absorber 7 yielding and plastically deforming. In addition, since the configuration is simple, just installing the bar-shaped energy absorber 7 between the foundation 2 and the supported body 3, the seismic isolation damper 5 is highly reliable and has few failures.
It becomes possible to provide

[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, and FIG. 3 is a plan view of FIG. 2. 1... Building 2... Foundation 3... Supported body 5... Seismic isolation damper 6a... Hole (guide hole) 7... Energy absorber 7g Relief part Applicant Mitsui Construction Co., Ltd. Agent Patent attorney Phase 1) Shinji (and 2 others) Figure 1 1L inverted ellipse

Claims (1)

[Scope of Claims] 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 damper installed between the foundation and the supported body; The energy absorber is connected vertically through both ends of the energy absorber in such a manner that one end is fixed and the other end is movably engaged in the axial direction through the hole, and A seismic isolation damper configured by forming a tapered escape part whose diameter decreases toward the tip at a portion of the energy absorber that engages with the hole.