Design of Simply-supported Box Girder for Suburban Railway
Suburban railway has started late in China,and there is no general design reference drawing for simply-supported box girder with corresponding standards in China.In combination with the design standards of suburban railway,this paper introduces the layout principle of bridge deck and compares the advantages and disadvantages of three-wall pouring in different working procedures.This paper compares and selects the dimensions of main structural members according to the finite element calculation results and structural requirements,uses the entity analysis and calculation method to calculate the local stress of the girder body under various working conditions,and clarifies the positions requiring local reinforcement.It verifies the train operation safety and comfort through train-bridge coupling calculation and analysis.The study conclusions are as follows:(1)When the distance between centers of tracks is 4.0 m,the bridge deck width is 10.8 m;when the distance between centers of tracks is 5.0 m,the bridge deck width is 11.8 m;(2)It is recommended to adopt the integrated transportation and erection scheme of bridge deck accessories that can shorten the construction period and ensure the quality;(3)The thickness of structural web is 36.0 cm,the thickness of top and bottom plates is 26.0 cm,the slope of web is 1:2.5,and the spacing between webs is about 5.2 m;(4)Local reinforcement is required for the lifting points and support positions;(5)The vibration performance of the bridge is good,the train operation safety can be ensured,and the riding comfort is good.
suburban railwaysimply-supported box girderstructural designintegrated transportation and erection
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