JPH0387464A - Vibration removing and earthquake isolating system - Google Patents

Abstract

PURPOSE:To confirm the earthquake isolating effect on a earthquake insulated body by providing a member for constraining shearing deformation on a dead weight supporting elastic body between a floor for supporting the earthquake insulated body and a support floor for supporting this floor to prevent the buckling of the dead weight supporting elastic body. CONSTITUTION:A vibration removing and earthquake isolating system is formed of a first mounting member 4 on a support floor 2 side, a second mounting member 5 on a floor 1 side, and a dead weight supporting elastic body 3 interposed therebetween. A shearing deformation constraining member 6 formed out of a plurality of steel bars and a wire is mounted between both the supporting members 4, 5. When an external vibrating force such as earthquake is added to the support floor 2, the relative displacement in shearing direction of the floor 1 and the support floor 2 is constrained by the shearing deformation constraining member 6. Hence, the buckling of the dead weight supporting elastic body 3 is prevented, and the vibration to the floor material can be insulated.

Description

[Detailed description of the invention] [Industrial field of application] The present invention provides a seismic isolation system that supports its own weight by a plurality of elastic bodies.
A pile related to a method for suppressing displacement in the shear direction of an elastic body supporting its own weight in a vibration isolation system [Prior art]
As shown in (Fig. 4), the seismic isolation floor 1 is attached to the bottom plate 4.
It is supported by a coil spring 5 on top, and surrounding the outside of the coil spring, two cylinders 14 and 15 with different diameters are provided on the seismic isolation floor 1 and the support base 9, respectively, and the cylindrical member with the smaller diameter is replaced with the cylindrical member with the larger diameter. The structure is such that the coil spring is located within a cylindrical member to prevent shear buckling, and there is a gap between the inner tube and the outer tube. When such a structure is subjected to a horizontal seismic force, due to the small horizontal stiffness of the coil springs supporting the seismic isolation floor, relative deformation occurs between the seismic isolation floor and the support base, causing damage to the inner cylinder member. There is a possibility that the outer cylinder members will collide, and the collision force from this collision will be transmitted to the seismically isolated body. Further, if the coil spring operates in the vertical direction while the inner cylinder member and the outer cylinder member are in contact with each other, the seismic isolation performance in the vertical direction may deteriorate due to friction between the inner cylinder member and the outer cylinder member. The conventional structure has the above-mentioned drawbacks.

[Problem to be solved by the invention]

When the above conventional technology receives a horizontal seismic force, the horizontal stiffness of the coil spring supporting the seismic isolation floor is small, so a relative displacement occurs between the seismic isolation floor and the bottom opening, and the inner cylinder The member and the outer cylindrical member come into contact and the seismic isolation performance deteriorates.

An object of the present invention is to provide a seismic isolation/vibration isolation system that prevents shear deformation of a self-weight supporting elastic body such as the above-mentioned coil spring and does not reduce the seismic isolation effect on a seismically isolated body.

[Means to solve the problem]

In order to achieve the above objective, shear deformation restraining members such as multiple steel rods, wires, chains, etc. are installed to restrain the shear deformation of the self-weight supporting elastic body between the floor supporting the seismically isolated body and the supporting floor.
Installed between the floor and the supporting floor.

Furthermore, in order to allow slight expansion and contraction of the shear deformation restraint member due to the vertical expansion and contraction of the self-weight supporting elastic body, one end or both ends of the shear deformation restraint member.

A tensile load is applied to the shear deformation restraining member with an elastic body interposed therebetween.

[Effect]

When an earthquake force is applied to the support floor, the relative displacement of the floor and the support floor in the shear direction is restrained by the shear deformation restraining member, and shear deformation of the self-weight supporting elastic body is prevented.

Moreover, the relative displacement in the vertical direction between the floor and the supporting floor when the self-weight supporting elastic body vibrates in the vertical direction is absorbed by the elastic body at one end or both ends of the shear deformation restraining member.

〔Example〕

FIG. 1 shows an embodiment of the present invention. Floor 1 that supports the seismically isolated body
and the supporting floor 2, there is a self-weight supporting elastic body 3 that supports the load of the floor.
In the seismic isolation/vibration isolation system in which the first mounting member 4. A second mounting member 5 is provided on the floor side, and a steel rod or wire is provided between the two.

A shear deformation restraining member 6 such as a tune is attached so as to restrain the relative deformation of the floor and the supporting floor in the shear direction. According to this embodiment, a vertical seismic isolation element can be realized without causing shear buckling of the self-weight supporting elastic body.

2 shows a structure in which a horizontal seismic isolation structure is combined with the vertical seismic isolation structure shown in FIG. It is movable horizontally on the supporting floor by the flat plate 11, and is further provided with a horizontal elastic body between the floor and the supporting floor 2 for horizontal restoring force. 6 is supported by the second support member 5 via the hook member 7 and the elastic body 8, and the tension applied to the shear deformation restraint member 6 increases due to relative displacement between the floor 1 and the support floor 2 during vertical vibration. is absorbed by the elastic body 8.

In the embodiment shown in FIGS. 5 and 6, the entire structure is supported by a horizontally movable support platform 9 on a support floor 2, and a restoring force is applied by a horizontal elastic body 12 between the floor 1 and the support floor 2. This is a given horizontal base isolation structure. A part of the floor la is supported by a self-weight supporting elastic body 3 from a support stand 9.

Furthermore, a shear deformation restraining member is interposed between the floor and the surrounding horizontal base isolation structure floor, so that only a portion of the floor is RH isolated in the horizontal and vertical directions. According to this example, unlike the previous example, the relative deformation between the floors is restrained, but as a result, the horizontal/vertical seismic isolation structure part moves horizontally along with the surrounding horizontal seismic isolation structure part. Vibrate. Therefore, relative displacement in the horizontal direction in both methods does not occur, and shear buckling of the self-weight supporting elastic body 3 can be prevented.

〔Effect of the invention〕

According to the present invention, since the shear deformation of the self-weight supporting elastic body is restrained, shear buckling of the self-weight supporting elastic body can be prevented.

Further, since the elastic body at one end or both ends of the shear deformation restraining member absorbs the relative displacement in the vertical direction between the floor and the supporting floor, vertical vibration is not hindered.

Due to the above effects, a highly reliable vertical or three-dimensional seismic isolation/vibration isolation system can be provided.

The structure shown in Figure 4 of the meeting is as follows.

DESCRIPTION OF SYMBOLS 1... Floor, 2... Support floor, 3... Self-weight supporting elastic body, 4... Mounting member of the 2nd work, 5... Second mounting member,
6... Shear deformation restraint member, 7... Hook member, 8
... elastic body, 9 ... support base, 10 ... moving element,
11...Flat plate, 12...Horizontal direction elastic body, 13...
・Friction member, 14... External cylinder friction

Claims (1)

[Scope of Claims] 1. In a seismic isolation/vibration isolation system consisting of a self-weight supporting elastic body that supports the load of the floor, which is arranged between a floor supporting a seismically isolated body and a support floor, the shear deformation of the self-weight supporting elastic body is suppressed. A seismic isolation/vibration isolation system characterized by providing a plurality of restraining shear deformation restraining members between a floor and a supporting floor. 2. The seismic isolation/vibration isolation system according to claim 1, wherein an elastic body is interposed at one end or both ends of the shear deformation restraint member, and a tensile load is applied to the plurality of shear deformation restraint members. 3. In a seismic isolation/vibration isolation system in which a plurality of self-weight supporting elastic bodies supporting the floor are placed between the floor supporting the seismically isolated body and the supporting floor, one or more elastic bodies are movable on the supporting floor. a support base, the self-weight supporting elastic body is interposed between the support base and the floor, and a plurality of shear deformation restraining members for restraining shear deformation of the self-weight support are provided between the support base and the floor. A seismic isolation/vibration isolation system. 4. The seismic isolation/vibration isolation system according to claim 2, wherein an elastic body is interposed at one end or both ends of the shear deformation restraint member according to claim 2, and a tensile load is applied to the plurality of shear deformation restraint members. . 5. Seismic isolation and vibration isolation according to claim 3, wherein an elastic body is interposed between the supporting floor and a support base movable on the supporting floor, or between the supporting floor and the floor, giving a restoring force in the horizontal direction of the floor. system. 6. In a seismic isolation/vibration isolation system that supports the load of a floor using one or more supports movable on the support floor, a partial floor cut out from a part of the floor, and a connection between the partial floor and the support The partial floor is supported by the self-weight supporting elastic body, with a partial floor and a self-weight supporting elastic body of the seismically isolated body on the floor interposed therebetween;
A seismic isolation/vibration isolation system characterized in that a plurality of shear deformation restraining members are provided between the floor supported only by the support base. 7. The seismic isolation/vibration isolation system according to claim 6, wherein an elastic body is interposed at one end or both ends of the shear deformation restraint member, and a tensile load is applied to the plurality of shear deformation restraint members. 8. The seismic isolation and removal system according to claim 6, wherein an elastic body is interposed between the support floor and a movable support stand on the support floor, or between the support floor and the floor, providing a restoring force in the shear direction. Shaking system.