Steel elastomer lattice beam type section steel bridge expansion device

Abstract

The invention provides a steel elastomer lattice beam type section steel bridge expansion device. The device comprises two side beams located at both sides of an expansion joint, at least one middle beam and at least two joist beam sets; the middle beams and the joist beam sets are fixedly connected, the two ends of each joist beam set are fixed to the two sides of the expansion joint through a sliding pressure bearing support base and a movable steel ball support base respectively, each middle beam is connected with the side beam exactly opposite to the middle beam or another middle beam through waterproof adhesive tape, gusset plates are vertically fixed below each side beam and below each middle beam, and every two adjacent gusset plates are connected through a steel plate spring elastomer. By means of the device, on the one hand, the multi-directional displacement requirement of a bridge can be met, and the stability and the binding property are very good; on the other hand, the gusset plates are connected by the steel plate spring elastomers, the service life is long, the steel plate spring elastomers jointly decompose the expansion and contraction amount of the bridge, partial horizontal force borne by the middle beams can be balanced, the vertical shear force is transmitted, and the synchronism is good.

Description

technical field [0001] The invention relates to bridge expansion joints, in particular to a steel elastic lattice beam type steel bridge expansion device. Background technique [0002] The telescopic device is a key part of the bridge components and plays an important role in realizing the bridge function. The national standard "Road Engineering Terminology Standard" (GBJ124-1988) and the traffic industry standard "Highway Engineering Terminology and Structural Terminology" (JTJ 002-87) define the expansion device of the bridge as: in order to make the vehicle pass the bridge deck smoothly and meet the bridge deck structure Deformation needs, the general term for devices installed at bridge deck expansion joints. [0003] Commonly used bridge expansion devices can be divided into three types according to the system: ① Modular bridge expansion device; Comb plate type multi-directional displacement bridge telescopic device, etc. "General Technical Conditions for Highway Bri...

AI Technical Summary

Problems solved by technology

After the relevant technology was introduced into China, due to the relatively unqualified domestic material technology, the polyurethane compression elastomer or rubber shear spring, which is the main component of elastic control, has problems such as poor material technology and relatively poor durability.

At the same time, the localized modular bridge expansion device, which uses polyurethane compression elastomer or rubber shear spring as the elastic control, also has relatively poor expansion uniformity and identity of each mode in the expansion joint, whether it is test detection or actual use. And other issues

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