时速350km/h铁路客运专线桥梁设计中应注意的几个方面

高速列车对桥梁结构的动力作用远大于普通铁路桥梁,桥梁出现较大的挠度会直接影响桥上轨道的平顺性,造成结构物承受很大的冲击力,并且会影响到列车的运行安全,其中设计活载图式的选择,离心力以及结构的变形变位,梁体的自振频率都会对桥梁的安全存在影响,因此,这些方面都是在设计中应该注意的。

Dynamical effects on high speed railway bridges by high speed trains are far more than the effects burdened by conventional railway bridges. If the bridges have high deflection, the regularity of railway track will be affected, and this will make the structure take huge impact force, and then will influence the operation safety of trains. The selection of live load, centrifugal force, transfiguration and displacement of structure, natural frequency of bridge body will affect its safety. So these aspects should be paid more attention when bridge is designed.