【摘要】 根据对制动列车进行动态仿真计算，求解出每一轮对的制动力时程和位移时程；再通过空间离散的方法，将上述轮对时程转换为线桥结构钢轨节点的制动力时程。在此基础上，建立了线-桥整体分析模型。通过对不同墩台刚度、不同道床阻力系数的多种组合条件进行动力响应分析，研究PC简支梁铁路桥制动力有效系数与桥长和桥墩刚度之间的关系，提出了有效系数关系曲线计算公式。更多还原

【Abstract】 By means of dynamic simulation of a braking train, the time history of braking foree and distance for each braking shaftof the vehicles are obtained, which can be transformed into node braking time history of rails belonging to the track-bridge sys-tem by spacial discrete method.A track-bridge system model for simply supported PC-beam tailway bridges and the relevant equation of motion are established in this paper. Study is carried out on effective coefficient of braking force for PC-beam rail-way bridges relevant to bridge length and pier stiffness, based on the dynamic analysis with considerable combinaions of different longitudinal stiffness of piers, abutments and ballast bed. The results revealed that only bridge length and pier stiffnessare remarkable parameters to induence effective coefficient. Two practical formulas for calculating effective coefficient are alsogiven in the paper.更多还原