The spring elements are adopted to simulate the link between the bridge foundation and soil, and the longitudinal restraint of tracks on the superstructure of bridges.

• 摘要采用弹簧单元模拟地基对桥梁基础的嵌固以及轨道桥面系对梁体的纵向约束作用，建立桥梁－轨道桥面－地基共同受力的全桥整体模型。