Seismic isolation bearing with multistage self-reset capacity

Abstract

The invention discloses a seismic isolation bearing with multistage self-reset capacity. The seismic isolation bearing comprises an upper connecting plate (1) and a lower connecting plate (2), wherein the upper connecting plate (1) and the lower connecting plate (2) are correspondingly fixed on an upper structure and a foundation structure respectively; a high-damping rubber body (3) is fixed below the upper connecting plate (1); a sliding plate (6) is fixed below the high-damping rubber body (3) and can slide along an upper surface of a fixed plate (7) fixed on the lower connecting plate (2). According to the seismic isolation bearing with the multistage self-reset capacity, a high-damping rubber seismic isolation bearing and a friction-sliding seismic isolation bearing are connected in series to form a novel seismic isolation system, seismic isolation performance of the seismic isolation system can be sufficiently exerted under the condition of earthquakes with different levels of seismic intensity, and safety of the upper structure under the condition of earthquakes is protected; the seismic isolation bearing is safe, reliable and convenient to mount and maintain, can be effectively applicable to various construction projects and is suitable for being used in actual projects.

Description

technical field [0001] The invention relates to the field of seismic isolation technology, in particular to a seismic isolation support with multi-stage self-resetting capability that can satisfy elastic small earthquakes as well as large earthquakes. Background technique [0002] There are many types of isolation bearings, and the technology is relatively mature, but there are some unresolved problems in the rubber isolation bearings and friction-slip isolation bearings that are currently used: (1) The existing isolation systems Most of them have insufficient self-resetting ability and cannot meet the requirements of small earthquakes and large earthquakes at the same time. Due to the lack of reset ability, the displacement of the isolation layer is too large, and the isolation bearing loses stability and overturns under the action of the compression-shear coincidence effect, and the isolation bearing produces unrecoverable instability deformation, which causes the destruct...

AI Technical Summary

Problems solved by technology

[0002] There are many types of isolation bearings, and the technology is relatively mature, but there are some unresolved problems in the rubber isolation bearings and friction-slip isolation bearings that are currently used: (1) The existing isolation systems Most of them have insufficient self-resetting ability and cannot meet the requirements of small earthquakes and large earthquakes at the same time.

Due to the lack of reset ability, the displacement of the isolation layer is too large, and the isolation bearing loses stability and overturns under the action of the compression-shear coincidence effect, and the isolation bearing produces unrecoverable instability deformation, which causes the destruction of the overall structure; (2) It is difficult for a single isolation system to take into account both the isolation effect and the residual displacement. In the face of an earthquake exceeding the fortification intensity, the isolation support is likely to be damaged; (3) Some new isolation systems have a certain self-resetting ability , but most of them are in the stage of theoretical research, and the structure is complex, and no conclusion has been drawn about their reset performance, so they cannot be put into practical engineering applications.

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