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Method for reinforcing and modifying through steel truss bridge

A technology of steel truss and down-fitting, which is applied in the field of reinforcement and renovation of down-down steel truss bridges. It can solve the problems of difficult maintenance and repair, high material consumption, and large structural damage, so as to simplify the steps of reinforcement and renovation and shorten the construction period. , Simple and convenient construction

Inactive Publication Date: 2008-02-13
SOUTHWEST JIAOTONG UNIV
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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

Method used

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  • Method for reinforcing and modifying through steel truss bridge

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Embodiment

[0015] Figures 1 and 2 show that a specific embodiment of the present invention is: a method for strengthening and reforming a down-supported steel truss bridge, which is as follows: on both sides of the bottom of the truss 1 with a rectangular cross-section, welding or The way of threaded connection is fixedly connecting the plane bracket 2 of the steel structure, and the connected plane bracket 2 is on the same plane as the bottom of the truss 1 .

[0016] Wherein, the specific method of fixedly connecting the plane bracket 2 is: the end of the beam 12 at the bottom of the truss 1 protrudes and connects the cross brace 22; The diagonal braces 23 are obliquely connected in several rectangular internodes formed with the cross braces 22 ;

[0017] The specific method of obliquely connecting the diagonal braces 23 in the rectangular internodes is: connect one or more than one diagonal braces 23 in the rectangular internodes, and at least one end of one diagonal brace 23 is conne...

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Abstract

A method for strengthening and reforming a down-loaded steel truss bridge, which comprises the following steps: on both sides of the bottom of a truss (1) with a rectangular cross-section, a plane bracket (2) connected to a steel structure is fixedly connected by welding or threaded ), the connected plane bracket (2) is on the same plane as the bottom of the truss (1). The method can increase the lateral rigidity of the steel truss bridge and reduce the lateral vibration amplitude; less material is used, the construction and maintenance are simple and convenient, and the required 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00E01D6/00E01D101/30
Inventor 郑凯锋李荣昌吴臻旺胡绘新
Owner SOUTHWEST JIAOTONG UNIV
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