铁路桥梁在列车纵向制动作用下的动力反应分析

Dynamic Analysis of Railway Bridge Response to Longitudinal Braking Force

以列车制动原理为基础 ,获取列车制动力时程曲线 ,施加于实桥上 ,利用动力非线性有限元方法进行动态计算 ,获取整个桥跨上钢轨力响应的包络图及桥墩剪力的时程响应曲线 。

Based on the principle of train braking,the time history curve of braking force is abtained and applied to the railway bridge,to calculate the envelope diagram of rail responses over the span and the time history curve of shear response in the piers,making use of dynamic nonlinear finite element method for dynamic calculations.The effect of all related factors on the longitudinal dynamic responses of the bridges is analysed.