Anti-seismic steel support for bridge

Abstract

The invention discloses a anti-seismic steel support for a bridge. The anti-seismic steel support for a bridge comprises an upper support body connected with a bridge main beam and a lower support body which is connected with a bridge cover beam or a pier abutment; the anti-seismic steel support for the bridge further comprises a steel ball body which is arranged between the upper support body and the lower support body; a concave-arc-shaped upper connecting part, which is matched with the steel ball body, is arranged at a position, corresponding to the steel ball body, of the upper support body; a concave-circular-arc-shaped lower connecting part, which is matched with the steel ball body, is arranged at a position, corresponding to the steel ball body, of the lower support body; a spring is arranged between the upper support body and the lower support body and can move relatively; and wear-resisting layers are arranged on surfaces of the upper support body and the lower support body. The anti-seismic steel support for thebridge disclosed by the invention is simple in structure, clear in force transmission path and small in manufacturing and machining difficulty; and the support can have various functions of self-resetting, multidirectional limitation, vertical lifting prevention capability and the like.

Description

technical field [0001] The invention relates to the technical field of bridge anti-seismic and bridge seismic isolation, in particular to a bridge anti-seismic steel bearing. Background technique [0002] Each earthquake will lead to the loss of my country's national economy to varying degrees, and cause certain damage to bridge structures, housing buildings and hydraulic dams. It has brought great obstacles. How to ensure the safety of the bridge structure and reduce the earthquake disaster and secondary disaster of the bridge structure, how to choose a reasonable bridge structure seismic system and seismic isolation measures for the high-intensity area of ​​seismic fortification has always been a bridge structure. A hot research topic in the field of seismic engineering. [0003] The existing seismic bearings of bridge structures include lead rubber bearings, high damping rubber bearings, anti-seismic basin bearings and friction pendulum bearings; it is not difficult to fin...

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Problems solved by technology

[0003] The existing anti-seismic bearings of bridge structures include lead rubber bearings, high damping rubber bearings, anti-seismic basin bearings and friction pendulum bearings; it is not difficult to find that the bridge superstructure still has lateral limit Insufficient torsion resistance, insufficient longitudinal limit, etc. lead to the collision and spalling of the end of the main beam of the bridge structure, the damage of the transverse limit block and the accident of falling beams; under the action of a large vertical earthquake, the support of the bridge structure The seat is prone to tension; the above-mentioned types of anti-seismic bearings have relatively poor tensile strength or anti-vertical lift-off ability, which can easily lead to the support being empty; and the existing bridge anti-seismic bearings have relatively single functions and scope of application. , in order to achieve multi-function often need to cooperate with a variety of shock-absorbing measures, which will lead to a significant increase in cost

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