Multi-frequency seismic reduction and isolation cylindrical surface friction swinging support

Abstract

The invention discloses a multi-frequency seismic reduction and isolation cylindrical surface friction swinging support, and relates to the technical field of seismic reduction. The support comprisesan upper support plate, an upper middle transition body, a lower middle transition body and a lower support plate which are vertically and sequentially arranged, the inner side surfaces of the upper / lower support plates are cylindrical surfaces, the upper side surfaces of the upper middle transition body and the lower side surface of the lower middle transition body are slidably connected with theinner side surfaces of the upper / lower support plates through upper / lower friction sliding plates in a shape matching manner, the upper middle transition body is slidably connected with the lower middle transition body through a middle friction sliding plate in a shape matching manner, outer ends of upper / lower swinging limit plates are fixedly connected with the upper / lower support plates, the other outer ends of the upper / lower swinging limit plates contact with the upper / lower middle transition bodies, and the upper / lower swinging limit plates are symmetrically arranged along the upper / lower middle transition bodies. According to the swinging support, repeated rising and falling of a bridge under the action of external force such as temperature change displacement or a small earthquakecan be effectively prevented, seismic reduction and isolation energy dissipation can be effectively achieved by large sliding displacement under the action of moderate and large earthquakes, and thesupport can provide seismic reduction and isolation functions with multiple degrees of freedom and different frequency.

Description

technical field [0001] The invention relates to the technical field of shock absorption, in particular to a multi-frequency shock-absorbing and isolating cylindrical surface friction pendulum support. Background technique [0002] Most of the existing friction pendulum shock-absorbing and isolating bearings are spherical shock-absorbing and isolating bearings imported from abroad. The advantages of the existing spherical shock-absorbing and isolation bearings are: 1. Utilize the pendulum principle to change the vibration period of the bearing and stay away from the earthquake period to reduce the damage of earthquake energy to bridges or other buildings; 2. Through the relative motion between friction pairs The seismic energy is consumed to achieve the purpose of shock absorption; 3. The support can be automatically reset, and the support can be reset after the earthquake without or only requiring a small amount of external force, thereby facilitating the maintenance of the ...

AI Technical Summary

Problems solved by technology

The multi-frequency shock-absorbing and isolating cylindrical surface friction pendulum bearing can not only overcome the defect of repeated lifting and lowering of the bridge in the prior art when it is subjected to conventional external forces, but also solve the problem of the support in the prior art under the action of medium and large earthquakes. The technical problem is that the movement displacement is small and the shock absorption effect is not good.

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