An ultra-wide cross-sectional structure suitable for a through steel truss girder of a double-track railway

Abstract

The invention relates to a railway bridge, in particular to an ultra-wide cross-sectional structure suitable for a through steel truss girder of a double-track railway. Comprises a steel truss beam, across beam for supporting the line and a transverse inclined bar, wherein the cross beam is located at the top of the steel truss beam, the transverse inclined bar is located below the cross beam, one end of the transverse inclined bar is connected with the middle of the cross beam, the other end of the transverse inclined bar is connected with the steel truss beam, and the transverse inclined bar is inclined arranged on the cross section of the line. As that transverse incline bar vertically supports the cross beam, the vertical deflection of the cross beam unde the action of dead load and live load is greatly reduced, and the height of the cross beam of the ultra-wide truss-wide bridge deck system is effectively reduced, thereby realizing the effect of saving material and reducing self-weight.

Description

technical field [0001] The invention relates to a railway bridge, in particular to an ultra-wide cross-section structure suitable for an upper-supported steel truss girder on a double-track railway. Background technique [0002] Steel truss girders are commonly used in railway bridges, and are also widely used as load-bearing beams in long-span railway cable-stayed bridges or suspension bridges. As one of the commonly used forms of steel truss bridge deck system, the large beam and longiter system is composed of steel deck, beam, transverse rib and longitudinal beam. The vertical load of the bridge deck is mainly transmitted from the longitudinal beam to the beam, and then by the Beams are passed to the main truss nodes. When the width of the railway steel truss girder is within 15 meters, the span of the bridge deck longitudinal beam is generally about 13 meters, and the deck system beam and longitudinal beam bear the same force, so the height difference between the two is...

AI Technical Summary

Problems solved by technology

[0003] The beam span of the bridge deck system with an ultra-wide section is much larger than the span of the longitudinal beam of the bridge deck system, so under the same load, the deflection of the beam also increases. In order to solve the problem of excessive deflection of the beam in the prior art, the height of the beam is often increased. At the same time, pre-camber is set; but this leads to an increase in the amount of steel and self-weight of the beam, thereby increasing the cost

Images