Taking the track-bridge system of long span railway bridge as the research object,a vertical deformation mapping model between the bridge and ballast track was established by deriving theoretical formulas,and the correctness of the deformation mapping model was verified through numerical examples.The results show that it is feasible to investigate the vertical deformation mapping relationship by dividing the long span rail bridge system into three subsystems,namely bridge,ballast bed and sleeper,fastener and track.The vertical deformation of track on long span suspension bridge and cable-stayed bridge calculated by the track-bridge vertical deformation mapping model is consistent with the results of finite element simulation,which proved the track-bridge model developed in this paper is valid.By using the track-bridge vertical mapping model to calculate track deformation,it is possible to avoid establishing track structures in finite element models,thereby reducing the number of model elements and improving computational efficiency.
关键词
大跨度铁路桥梁/变形映射关系/理论分析/线-桥系统/有砟轨道
Key words
long span railway bridge/mapping relationship of deformation/theoretical analysis/track-bridge system/ballast track
维普
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