JPH0517344B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is mainly applied to seismic isolation structures.
This relates to seismic isolation damper bearings.

[Problem that the invention seeks to solve]

Current seismic isolation structures generally consist of three types of devices: seismic isolation bearings, dampers, and failsafes, but the need for these three types of devices requires large-scale construction and construction. Furthermore, the production cost of laminated rubber bearings, which are widely used as seismic isolation bearings, is high, so the cost is currently higher than that of non-seismic isolation structures.

This invention was made based on the current situation of seismic isolation structures, and aims to propose a new seismic isolation bearing with a simple structure in which the bearing and damper are integrated.

[Means for solving problems]

In the present invention, a support convex portion is provided protrudingly under the upper structure, and a support recess is provided on the upper surface of the lower structure to form a support portion, and a seismic isolation bearing and a damper are placed here, thereby creating a seismic isolation structure. The aim is to simplify the process and reduce bearing manufacturing costs.

The supporting convex portion is provided in a cylindrical shape, and the supporting concave portion is formed to have a diameter larger than that of the supporting convex portion.

A sliding steel plate and a fixing steel plate are connected to the lower surface of the bearing convex and the upper surface of the bearing recess, respectively, and these two steel plates function as a seismic isolation bearing that blocks horizontal forces while supporting the load of the superstructure. When a horizontal force is applied, the slide steel plate slides on the fixing steel plate.

In addition, cylindrical or elliptical ring springs are arranged radially between the outer periphery of the bearing protrusion and the inner periphery of the bearing recess, with the center axis being vertical, and these ring springs act as dampers that absorb energy when horizontal force is applied. work.

The seismic isolation structure is composed of the above-mentioned slide and fixing steel plates and ring springs, and the upper structure rests directly on the lower structure, and there is no need for a fail-safe mechanism because there is no risk of the bearings being damaged.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment.

The seismic isolation damper bearing A of the present invention is a structure in which the seismic isolation bearing and damper necessary for a seismic isolation structure are provided in one place under the superstructure B.

As shown in Fig. 1, a cylindrical support protrusion b is provided under the upper structure B, and a support recess c having an inner diameter larger than the diameter of the support protrusion b is provided on the upper surface of the lower structure C. A support portion a on which a seismic isolation damper support A is installed is formed here.

An inner steel plate b-1 and an outer steel plate c-1 for fixing a ring spring 3, which will be described later, are joined to the outer circumferential surface of the supporting convex portion b and the inner circumferential surface of the supporting concave portion c, respectively.

The lower surface of the bearing protrusion b and the upper surface of the bearing recess c
As shown in the figure, a slide steel plate 1 and a fixing steel plate 2, which are in contact with each other, are joined to form a seismic isolation support. The opposing surfaces of both steel plates 1 and 2 are treated with Teflon to reduce frictional force, or the Teflon plates 1' and 2' are bonded together.

Between the outer periphery of the bearing protrusion b and the inner periphery of the bearing recess c, cylindrical or elliptic cylindrical ring springs 3 serving as dampers are arranged radially with the central axis vertical as shown in Fig. 1. It is fixed to the steel plate b-1 and the outer steel plate c-1 with bolts 4.

The ring spring 3 is manufactured, for example, by cutting a steel pipe to an appropriate length, and its wall thickness is determined depending on the performance as a damper. In order to have a non-directional effect, it is preferable to install eight or more as shown in the figure.

The embodiment shown in FIG. 1 uses an oval cylindrical ring spring 3, and in this case, the ring spring 3 is forcibly deformed and fitted after being cut.

FIG. 2 shows the behavior of the support portion a when a cylindrical ring spring 3 is used. shows the situation under normal conditions, and shows the situation when a horizontal force is applied in the direction of the arrow. As shown here, the ring spring 3 in the direction of displacement of the upper structure B is compressively deformed, and the opposite side is tensilely deformed, thereby absorbing the horizontal force.

FIG. 3 shows an embodiment in which a laminated rubber bearing 5 is installed in the middle of the bearing protrusion b, and the bearing part a is further provided with the function of blocking vibrations in the vertical direction.

〔Effect of the invention〕

As described above, this invention simplifies the structure because the seismic isolation bearing and damper are placed in one location of the structure.In particular, the ring spring can be manufactured by cutting a steel pipe, so the bearing manufacturing cost is reduced. , and it is possible to reduce construction costs.

[Brief explanation of the drawing]

Figures 1 and 2 are a sectional view and a plan view showing an embodiment of the present invention, Figure 2 is a schematic diagram showing the behavior of the bearing, and Figure 3 is another embodiment. FIG. A...Seismic isolation damper support, B...superstructure, C
... lower structure, a ... support part, b ... support convex part,
c...Support recess, b-1...Inner steel plate, c-1...
...Outer steel plate, 1...Slide steel plate, 1'...Teflon plate, 2...Fixing steel plate, 2'...Teflon plate,
3...Ring spring, 4...Bolt, 5...Laminated rubber bearing.

Claims (1)

[Claims] 1. In the support part of a structure formed of a cylindrical support protrusion protruding under the upper structure and a support recess recessed in the upper surface of the lower structure and having an inner diameter larger than the diameter of the support protrusion, the support protrusion A slide steel plate and a fixing steel plate are bonded to the lower surface and the upper surface of the bearing recess, respectively, and the center axis thereof is vertical. A seismic isolation damper bearing that is arranged radially and fixed to a bearing convex part and a bearing concave part.