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Article Navigation >  Journal of Traffic and Transportation Engineering  > 2005  >  5(3): 19-24
Xu Qing-yuan, Chen Xiu-fang, Zhou Xiao-lin, Yang Xiao-li. Mechanics computation model comparison of continuously welded rails on high-speed railway bridges[J]. Journal of Traffic and Transportation Engineering, 2005, 5(3): 19-24.
Citation: Xu Qing-yuan, Chen Xiu-fang, Zhou Xiao-lin, Yang Xiao-li. Mechanics computation model comparison of continuously welded rails on high-speed railway bridges[J]. Journal of Traffic and Transportation Engineering, 2005, 5(3): 19-24.
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Mechanics computation model comparison of continuously welded rails on high-speed railway bridges

  • School of Civil and Architectural Engineering, Central South University, Changsha 410075, China

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  • Author Bio:

    Xu Qing-yuan(1972-), male, PhD, 86-731-2655611, xuqingyuan1972@sohu.com

  • Received Date: 2005-05-28
  • Publish Date: 2005-09-25
    Abstract
  • The girder, abutment and pier as well as the loads of high-speed railway bridges are of strong spatial mechanics characteristics, the plane mechanics calculation model cannot reflect these conditions effectively, and has its limitations.Based on the achievements of the predecessors, a three-dimensional finite element spatial mechanics model for calculating the additional longitudinal forces of continuously welded rails on high-speed railway bridges was established.Taking a 10-span 32 m simple supported double-track box girder on Qin-Shen passenger special line as an example, the additional longitudinal forces were analyzed, and the calculation results of the new three-dimensional spatial model and traditional plane model were compared.The calculation results show that the flexiable additional longitudinal forces calculated by tow models are almost equal; for the winding force, there is distinct discrepancy between the two calculation results; when the double-track loaded with the symmetry braking force, the braking additional longitudinal forces calculated by the two models are almost equal; when one track braking or two track braking in opposite directions, the calculation result of the plane model is bigger than that of the spatial model, the braking additional longitudinal force calculated by the plane model is conservative, which indicate that the spatial model is more feasible and effective to calculate the additional forces than the plane model.

     

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