A bridge damping expansion joint

Abstract

The invention discloses a bridge damping expansion joint. The bridge damping expansion joint comprises a square-groove-shaped joint body and a cushioning and damping structure located in the joint body, the cushioning and damping structure comprises a right corrugated rack and a left corrugated rack which are located on two sides in the joint body, the right corrugated rack and the left corrugatedrack have the same shape and structure and are arranged on a same horizontal plane in a staggered mode, upper surfaces of the corrugated racks are flush with a top surface of a bridge body, and the corrugated racks are provided with steel bar rods embedded in the bridge body; and convex parts and concave parts arranged at intervals are arranged at the tops of the corrugated racks, the front endsof the convex parts and the tail ends of the concave parts are all in a circular arc shape, and paralleled plates arranged in parallel with the convex parts are arranged under the concave parts. According to the bridge damping expansion joint, through the following movement of a damper, a stable state is kept when the joint body is contracted and stretched because of cold and hot effects, the damper is different from a regular single-type spring damping, when the distance of the joint body is changed because of temperature, the relative stability of the self length of spring can be kept, and the damping performance of the damper cannot be influenced due to long-time stretching and contraction, and the long time effectiveness of the cushioning and damping structure is guaranteed.

Description

technical field [0001] The invention relates to bridge highway facilities, in particular to a bridge damping expansion joint. Background technique [0002] Bridge expansion joints refer to expansion joints usually set between two girder ends, between girder ends and abutments, or at the hinged position of the bridge in order to meet the deformation requirements of the bridge deck. It is required that the expansion joints can freely expand and contract in two directions parallel to and perpendicular to the bridge axis, and are firm and reliable. The vehicles should run smoothly without sudden jumps and noises; they should be able to prevent rainwater and garbage from infiltrating and blocking; installation, inspection, and maintenance , Elimination of dirt should be simple and convenient. Where expansion joints are set, railings and bridge deck pavement must be disconnected. The function of bridge expansion joints is to adjust the displacement and connection between the sup...

AI Technical Summary

Problems solved by technology

Once the telescopic device of the skew bridge is damaged, it will seriously affect the speed, comfort and safety of driving, and even cause driving safety accidents

[0003] Most of the structures of current bridge expansion joints adopt the damping structure directly connected by springs, such as Chinese Patent Announcement No. CN208201627U "A Damping Device for Bridge Expansion Joints" and Announcement No. CN108755398A "Bridge Expansion Joints". It can guarantee the shock absorption effect, but after the expansion joint is used for a long time, the shrinkage and stretching caused by temperature changes will continue to change, and the spring will also deform along with it, resulting in a gradual decline in spring performance and greatly reduced shock absorption performance.

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