JPS63114778A - Earthquakeproof damper - Google Patents

Abstract

(57) [Abstract] 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 article relates to a seismic isolation damper used to minimize vibrations.

(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) 4 Problems to be Solved by the Invention Furthermore, as a seismic isolation damper, it is desirable to have a structure that is simple and that can effectively absorb earthquake energy.

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

(d) Means for solving the first problem, that is, the present invention provides the following:
It is constructed by installing one or more rod-shaped energy absorbers (6) having a buffer bending band (6a) formed in the middle part thereof with both ends fixedly supported.

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. r (e) below
The same applies to the column ``, action''.

(e) 3 Effects With the above-described configuration, the present invention operates so that the energy absorber (6) undergoes plastic deformation and absorbs seismic energy in the event of an earthquake.

(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 plan view of FIG. 1, and FIG. 3 is a diagram showing an example of an energy absorber.

As shown in FIG.
The building 2 has a supported body 5 supported by a support body 13, and the building 2 is elastically supported by a rubber support body (not shown) provided between the building 2 and the supported body 5 with respect to the foundation 3. is widely supported. A large number of seismic isolation dampers 1 according to the present invention are provided at appropriate positions between the base vJ3 and the supported body 5, as shown in FIGS. 1 and 2.

As shown in FIGS. 1 and 2, the seismic isolation damper 1 includes an energy absorber 6 made of a steel rod bent into a crank shape.
As shown in FIG. 2, the energy absorbers 6 are installed radially in the space between the foundation 3 and the supported body 5. As shown in FIG. 3, each energy absorber 6 includes a connecting portion 6b that connects to the foundation 3 side and the supported body S side;
6c, and a buffer bending band 6a is formed in the horizontal direction midway between the connecting portions 6b and 6c. In addition, the connection mode between each connection part 6c, 6b, the supported body 5, and the foundation 3 is fixed support.

Since the seismic isolation damper 1 has the above-described configuration, in normal times, the seismic isolation damper 1 has the connection parts 6b, 6c and the buffer bending band 6a connected to each other, as shown in FIGS. 1 and 2. It has a substantially right-angled shape, and no stress is applied inside the energy absorber 6. However, in the event of an earthquake, as shown in the imaginary line in Figure 3, a relative horizontal movement occurs between the foundation 3 and the supported body 5. The positional relationship between the connecting portions 3a and 5a to which the supported body 5 is connected is shifted in a direction parallel to the paper plane of FIG.

Then, the distance L between the connection parts 3a and 5a in normal times
1 expands or contracts by a distance L2+ during an earthquake. Then, as shown in FIG. 3, the energy absorber 6 is plastically deformed by expanding and contracting between the connection parts 3a and 5a via the central buffer bending zone 6a, and absorbs earthquake energy.

In the above embodiment, a steel bar bent into a crank shape was used as the energy absorber 6. Of course, any shape may be used as long as it has the cushioning bending zone 6a that can vary the distance between the sections 3a and 5n.

(g) 4 Effects of the Invention As explained above, according to the present invention, the rod-shaped energy absorber 6 with the buffer bending band 6a formed in the middle part is placed between the supported body 5 and the foundation 30 with both ends thereof Since one or more of them are installed in a fixed and supported manner, seismic energy is effectively absorbed by the energy absorber 6 yielding and plastically deforming. Moreover, since the energy absorber 6 has a simple structure of simply bending and forming a bar material such as steel, it is possible to provide a highly reliable seismic isolation damper 1 with less possibility of failure.

[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 plan view of FIG. 1, and FIG. 3 is a diagram showing an example of an energy absorber. 1...Seismic isolation damper 2...Building 3...Foundation 5...Supported body 6...Energy absorber 6a...Buffer bending zone Applicant Mitsui Construction Co., Ltd. Agent Patent attorney Phase 1) Shinji (and 1 other person) Fig. 1 Chapter 4 91 Furnace

Claims (1)

[Scope of Claims] A seismic isolation damper installed between a foundation of a building and a supported body supported by the foundation to absorb seismic energy during an earthquake, comprising: between the supported body and the foundation; , a seismic isolation damper constructed by installing one or more rod-shaped energy absorbers each having a buffer bending band formed in the middle thereof with both ends fixedly supported.