Two-stage buffering and limiting seismic isolation device

Abstract

The invention relates to a two-stage buffering and limiting seismic isolation device. The device comprises a seismic isolation support, an upper support plate fixed at the upper end of the seismic isolation support, a lower support plate fixed at the lower end of the seismic isolation support and two-stage buffering mechanisms arranged outside the seismic isolation support; each two-stage buffering mechanism comprises two first limiting stop blocks, a U-shaped steel plate, a second limiting stop block, two third limiting stop blocks and a steel bar, a lower steel plate is fixed on the upper end surface of the lower support plate, the two first limiting stop blocks are fixed on the lower end surface of the upper support plate, the second limiting stop block is fixed on the upper end surfaceof an upper steel plate and located between the two first limiting stop blocks, the two third limiting stop blocks are fixed on the lower end surface of the upper steel plate, and the steel bar is fixed on the upper end surface of the lower steel plate and located between the two third limiting stop blocks. The seismic isolation device solves the technical problem of failure of the seismic isolation support due to too large horizontal displacement under the action of near-fault ground motion, and belongs to the technical field of seismic isolation of buildings.

Description

technical field [0001] The invention relates to the technical field of building shock isolation, in particular to a two-stage buffer and limit shock isolation device. Background technique [0002] The major earthquakes that have occurred in recent years have all caused serious damage to building structures and bridge structures, causing a large number of casualties and economic losses. The seismic isolation structure will have a very adverse effect, causing large deformation and failure of the isolation bearing, which will lead to structural damage or even collapse. [0003] In order to ensure the safety of the superstructure of the building and bridge isolation structure when it is subjected to a near-fault earthquake, a buffer limit device is usually added to the isolation layer of the engineering structure. The existing buffering and limiting device has a complex structure and is difficult to assemble, which is not conducive to engineering applications; moreover, the pos...

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Problems solved by technology

[0005] Aiming at the technical problems existing in the prior art, the purpose of the present invention is to provide a two-stage buffer limit shock-isolation device to solve the technical problem that the shock-isolation support fails due to excessive horizontal displacement under the action of a near-fault earthquake

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