刚度突变轨道结构的连续地基梁模型基本解及其应用

The Solution of Continuous Foundation Beam with Variable Supporting Stiffness and its Application

用刚度突变的连续弹性支承梁模型表示桥梁和路基两种不同类型的轨道支承条件,给出了在力学模型上的任意位置有一集中力作用解析解,具有多个集中荷载作用的结果可以通过叠加得到,此结论可应用于其他刚度突变连续地基梁结构中。还对不同刚度比、不同加载位置时钢轨的应力和位移进行了讨论。

The paper adopts the continuous elastic foundation beam of variable bedding value to model the track on roadbed-bridge transition section. The analytical solution is obtained by using the mechanics model under an arbitrary concentrated load. The results of acting more loads on the mechanics model can be obtained by using the superposition method. This conclusion can also be used in other continuous foundation beam with variable bedding value. The stresses and displacements of the rail are also discussed under the different stiffness ratio and different loading cases.