A kind of large earthquake and small earthquake stiffness switching damping spherical bearing and damping method

Abstract

The invention discloses a shock-absorbing spherical bearing with rigidity switching between large earthquake and small earthquake and a shock-absorbing method thereof. The invention adopts a displacement box, a damping plate spring and a limit pin to realize the switching of stiffness under the action of a small earthquake and a large earthquake, respectively resisting different levels of earthquake action; when an earthquake occurs and the lateral force exceeds the horizontal seismic force threshold , the limit pin is cut off, the limit constraint is released, the slide plate can slide freely, and the middle bracket becomes an elastic support that can translate and rotate, thereby converting the kinetic energy generated by the earthquake into potential energy; at the same time, during the sliding process, the frictional resistance Consume part of the seismic energy, prolong the structure period, and achieve the effect of shock absorption. Compared with the existing shock-absorbing spherical bearings, the biggest advantage of the present invention is that the stiffness switching of the spherical bearings under the conditions of small earthquakes and large earthquakes can be realized, and the internal force of the structure under the action of large earthquakes can be significantly reduced. It has the characteristics of simple structure, stable seismic performance, reliability and durability.

Description

technical field [0001] The invention relates to the field of building structures in civil engineering, in particular to a shock-absorbing spherical bearing with rigidity switching between large earthquakes and small earthquakes and a shock-absorbing method thereof. Background technique [0002] At present, shock-absorbing spherical bearings are widely used in large steel structures. The spherical support can realize translation and rotation between the upper structure and the lower structure, and can provide elastic support for the upper structure. The existing shock-absorbing spherical bearing includes: an upper seat plate, an upper bearing backing plate, an upper plane slide plate, a spherical crown liner, a middle bracket, an inner displacement box, a shock-absorbing leaf spring and an outer displacement box, etc. [0003] Due to the use of components such as the upper seat plate, the spherical crown liner, the middle bracket, the inner displacement box, the outer displa...

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Problems solved by technology

[0005] Aiming at the problem that the shock-absorbing spherical bearings in the prior art do not consider the stiffness switching under the action of small earthquakes and large earthquakes, the present invention improves the traditional shock-absorbing spherical bearings and provides a stiffness switch between large earthquakes and small earthquakes. Shock-absorbing spherical bearings, so as to solve the problem that the existing spherical bearings cannot change the stiffness under different levels of earthquakes

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