城市轨道交通桥梁无缝线路纵向力的空间一体化模型分析

Three-Dimensional Conjunct Model: For the Research on the Longitudinal Forces of Urban Mass Transit Continuous Welded Rails

运用梁轨间阻力系数的概念和梁轨间的阻力从线性转非线性的性质 ,分析计算桥梁和钢轨的相互作用力 ,运用“m”法计算基础刚度。在此基础上 ,建立了城市轨道交通桥梁无缝线路纵向力的空间一体化力学模型 ,编制了非线性有限元程序 ,通过实例进行了模型验证。此模型可计算温度的影响 ,探究双线桥梁上的单线荷载作用下的挠曲力。

The Three-dimensional Mechanical Model is produced on the an alysis of the mutual-effect forces of the bridge and the rail. This model helps to make a non-linear finite element program which is tested and verified by the example in UMT. The author argues that the model can be used to calculate the longitudinal force caused by the temperature or the load acting on one of the double railway tracks, as well as the braking force and the breakage force.