Method for reinforcing and modifying through steel truss bridge

Abstract

A lower supported type steel truss bridge reinforcing and reconstructing method. The technical proposal lies in that plane supports (2) of steel structure are fixed and connected to both sides at the bottom of the trusses (1) with rectangular cross sections through welding or thread connection; the bottoms of the connected plane supports (2) and the trusses (1) are on the same plane. The method can add the transverse rigidity of the steel truss bridge, and reduce the transverse vibration; the materials are saved, the construction and maintenance are simple and convenient, and the cost is low.

Description

technical field [0001] The invention relates to a method for strengthening and reforming an under-supported steel truss bridge. Background technique [0002] The under-supported steel truss is used as the load-bearing structure of the bridge. The cross-section of the steel truss is rectangular, and the bridge deck is located at the bottom of the steel truss, so the bottom of the truss is the main force-bearing member. Long-span, fast or high-speed line bridges have relatively large lateral vibration amplitude (ie, the left and right swing of the bridge). Especially for some old bridges, the lateral stiffness of the bridge is obviously low due to the low design standards at the beginning or the long service life. The lateral amplitude is too large to meet the needs of traffic development. In order to increase the lateral stiffness of the truss and reduce the lateral vibration amplitude of the bridge, the existing method of reinforcement and reconstruction is: to connect mult...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: high material consumption, a large number of bolt holes will cause great damage to the original structure, cumbersome and difficult construction, and difficult maintenance and repair in the later period

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