高速铁路长大桥梁无缝线路附加挠曲力计算分析

根据高速铁路长大桥梁无砟轨道无缝线路梁轨相互作用原理,结合京沪高铁实际情况,建立了京沪高铁整桥双线有限元模型,以10跨32 m混凝土简支箱梁桥为例,用有限元法计算分析了高速铁路长大桥梁无砟轨道无缝线路附加挠曲力及附加挠曲位移的分布。计算结果表明,列车在双线简支箱梁上单线运行时,其附加挠曲力值较小,4根钢轨的附加挠曲力值有所差别,但差别不大。钢轨附加挠曲力在桥台处较大,钢轨纵向位移则在桥梁中部较大,在桥台处较小。

Calculation Analysis of Additional Deflection Force of CWR on High Speed Railway Long Span Bridge

Based on principle that interaction between beam and rail of CWR in ballastless track on high speed railway long span bridge,combined with Jing-Hu high speed railway engineering practical,the finite element model of the whole bridge with double bound railways is established.As an example of 10 spans-32m concrete simply supported box girder bridge,the additional deflection force and displacement distribution of the CWR in ballastless track on high speed railway long span bridge have been calculated by the finite element method.The results show that,when the train operates on double bound railways of the simply supported girder by the single line,the additional deflection forces on four rails are small and there are tiny difference.The additional deflection force of rail is large on bridge abutment and the longitunal displacement of rail is large in the mid-span and small on bridge abutment.