A kind of anti-tension and position-limiting combined shock-isolation bearing

Abstract

The invention provides a combined anti-tension and position-limiting shock-isolation bearing, which includes: an upper connector, a rubber bearing, a lower connector, a cover plate, a plurality of elastic members and a plurality of steel wire ropes, and the cover plate is arranged on the upper connector box In the cavity and the top surface of the cover plate is lower than the top surface of the upper connector, the elastic member is arranged between the cover plate and the upper connector, the rubber bearing is arranged between the bottom plate of the upper connector and the lower connector, and the box-type cavity There is a limit device in the body, and the steel wire rope passes through the box-type cavity, one end of which is anchored on the cover plate and the other end is anchored on the lower connecting piece; when the rubber bearing is subjected to tension, the steel wire rope transmits the tension to the elastic member to bear part of the tension ; When the rubber bearing is deformed too much due to shearing or tension, the limit device restricts its continuous deformation, so that it can not only achieve the shock isolation effect of ordinary vibration-isolation bearings, but also ensure that the rubber bearing itself can withstand a large tensile force. The structure is not easy to be damaged, thus effectively ensuring the safety and reset capability of the upper structure under the action of earthquake.

Description

technical field [0001] The invention belongs to the technical field of seismic isolation and shock absorption of building structures, and relates to a seismic isolation support. Background technique [0002] The base isolation structure is a structural system formed by installing an isolation device between the structure and the foundation to prolong the natural vibration period of the structure, increase the structural damping, and prevent the transmission of seismic energy to the upper structure to reduce the Effects of earthquakes on structures. Lead core laminated rubber bearing is a widely used seismic isolation device. When in use, its top surface and bottom surface are respectively connected and fixed with the upper structure and the foundation, so that it can not only bear the vertical load of the upper structure, but also because of its It has lateral flexibility and can block the upward transmission of seismic energy, and can also consume and absorb seismic energy...

AI Technical Summary

Problems solved by technology

However, the tensile bearing capacity of the current lead-core laminated rubber bearing is very poor, and damage may occur under a small tensile stress, which may lead to the destruction of the entire base isolation structure

In addition, when the shear deformation of the lead core laminated rubber bearing is too large, it is also prone to compression shear damage, and the restoring force of the lead core laminated rubber bearing is difficult to ensure the structural restoration when the deformation is large.

[0004] In order to overcome the above-mentioned defects, if only rigid tension rods are attached between the upper connecting plate and the lower connecting piece of the lead-core laminated rubber bearing, although the tensile capacity can be guaranteed, when the lead-core laminated rubber bearing occurs a large When deformed, the rubber body will elongate and the tension rod cannot be elongated, which will limit the horizontal deformation of the lead-core laminated rubber bearing so that it cannot achieve the purpose of shock isolation, and at the same time, the lead-core laminated rubber bearing cannot be deformed vertically. Insulate vertical seismic energy; in addition, if a horizontal limit device is added outside the lead-core laminated rubber bearing, although it can ensure that the lead-core laminated rubber bearing will not be damaged by shearing, it cannot guarantee its tensile capacity and restoring force

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