An anti-seismic horizontal self-locking device for simply supported bridge supports

Abstract

The invention relates to an anti-shock horizontal self-locking device for a support of a bridge simply support. The device can stimulate the horizontally constrained simply support under the action of equal accidental load of an earthquake, and provides enough horizontal constraint for a bridge if necessary. The novel anti-shock horizontal self-locking device for the bridge support cannot only meet vertical constraint of the simply support in a bridge normal using process, but also stimulate bolt pin to provide horizontal constraint for the bridge under the equal action of an earthquake load. The device is composed of a pier fixing stationery end and a moving end connected to a bridge floor structure. The device provided by the invention provides a triggered type support self-locking device in a pure mechanical manner for solving the problem that the support of the simply support of the bridge cannot provide enough horizontal constraint under the action of earthquake load, achieves the purpose that the simply support separately releases and constrains horizontal degree of freedom at ordinary times and in earthquake, and is simple to manufacture, high in adaptability and has a wide application prospect in the field of bridge structure.

Description

technical field [0001] The invention relates to simply supported supports applied to bridge structures, belonging to the technical field of bridge structures. Background technique [0002] Simply supported bearings of bridges are a very common support form in bridge structures, and are widely used in bridge types such as simply supported bridges and continuous girder bridges. Simply supported bearings are simple and clear in force, and relax the longitudinal horizontal constraints of the bridge deck and reduce the internal force level of the bridge system. It is a very favorable support form in normal use. However, under the earthquake load, the earthquake damage is greatly aggravated because the simply supported support cannot provide sufficient horizontal restraint. According to literature research, nearly 30% of simply supported bridges are damaged in the form of bearing failure and falling beams. Therefore, overcoming the lack of horizontal constraints of simply suppor...

AI Technical Summary

Problems solved by technology

The invention cleverly utilizes the piston hydraulic mechanism to solve the problem of the lack of horizontal restraint of simply supported bearings under the action of earthquake loads, etc., and the device is simple to manufacture and has strong applicability, and has wide application prospects in the field of bridge structures

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