Abstract
Taking a (130+1060+90)m railway suspension bridge as the research object, and taking the track-beam foundation model as the core, a simulation model of the coupling between the large span suspension bridge and the double track is constructed, including steel truss girder, main cable, suspender, orthotropic steel bridge deck, concrete bridge tower and track structure. The distribution law of the stress and deformation of the rail under the effect of temperature load, vertical load and braking load is revealed. The main conclusions are as follows: in order to optimize the stress and deformation of the rail, it can be considered to arrange the rail expansion regulator on the bridge. Setting the regulator at both ends of the steel truss girder of the bridge can significantly reduce the extreme value of rail stress and deformation; when the two lines are loaded simultaneously, the vertical deformation of the rail in the middle of the main girder reaches 2m. In this case, the bending force is the load that needs to be calculated more than the expansion force.
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