A three-dimensional shock-isolation bearing with variable stiffness

Abstract

The invention provides a variable-rigidity three-dimensional seismic isolation support. The seismic isolation support comprises a plurality of anchor rods, a lower support plate, a vertical seismic isolation pad and a plurality of seismic isolation gaskets, wherein the anchor rods are arranged at equal intervals, and one end of each anchor rod is buried in a concrete foundation bearing platform; the vertical seismic isolation pad is located on the concrete foundation bearing platform, the lower support plate is located on the vertical seismic isolation pad, and the other end of each anchor rodpenetrates through the vertical vibration isolation pad and the lower support plate in sequence; the vertical vibration isolation pad, the lower support plate, the seismic isolation gaskets and the concrete foundation bearing platform are tightly fixed together by the anchor rods through bolts; a lower sliding block is located above the spherical curved surface of the lower support plate, and anupper sliding block is located above the lower sliding block; an upper support plate is located on the upper sliding block. Vertical and transverse shake can be effectively isolated, the collision between a structure isolated from the shock and a seismic isolation trench retaining wall or between adjacent structures is reduced, and the integrity of elements such as a porcelain bushing in a transformer substation facility is protected.

Description

technical field [0001] The invention relates to the anti-seismic field, in particular to a three-dimensional shock-isolation bearing with variable stiffness. Background technique [0002] The base isolation technology can significantly reduce the seismic energy transmitted to the upper structure and reduce the damage to the upper structure caused by the earthquake, so it has been promoted and widely used in the world for a long time. Components have low horizontal stiffness, so the horizontal side shift is large under the action of the earthquake, which may cause the base of the isolation structure to collide with the surrounding isolation trenches, retaining walls or other structures. Seismic isolation structure——The FCC building has conducted seismic response measurements, and found that the seismic response curve of the structure has a sudden change in a certain period of time. Through systematic identification of the structure, it was found that during the earthquake, th...

AI Technical Summary

Problems solved by technology

[0005] 1) Cannot effectively isolate vertical ground motion;

[0006] 2) Larger horizontal displacements will be generated under strong earthquakes, causing collisions between the upper structure and the retaining wall of the seismic isolation ditch or adjacent structures, or causing brittle failure of components such as porcelain bushings in substation facilities

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