Large earthquake and small earthquake stiffness switch shock absorbing spherical bearing and shock absorbing method thereof

Abstract

The invention discloses a large earthquake and small earthquake stiffness switch shock absorbing spherical bearing and a shock absorbing method thereof. The purpose of achieving stiffness switch under the actions of a large earthquake and a small earthquake and resisting different horizontal earthquake actions respectively are achieved by adopting displacement boxes, shock absorbing leaf springs and limiting pins. When an earthquake occurs and the lateral force exceeds a horizontal earthquake force threshold value, the limiting pins are cut off, limiting constraint is relieved, a sliding plate can slide freely, a middle bracket becomes an elastic support and can conduct translational motion and rotation, and the kinetic energy produced by the earthquake can be converted into the potential energy; meanwhile, in the slippage process, frictional resistance consumes part earthquake energy, the structural cycle is prolonged, and the shock absorbing effect is achieved. Compared with an existing shock absorbing spherical bearing, the large earthquake and small earthquake stiffness switch shock absorbing spherical bearing has the biggest advantages that stiffness switch under the condition of the large earthquake and the small earthquake is achieved, the internal force of the structure under the large earthquake can be obviously reduced, the structure is simple, and the earthquake resistance performance is stable, reliable and endurable.

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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