Analysis of railway continuous bridges subjected to running trains and non-uniform seismic excitations

Based on the theory of dynamic interactions between the wheel and rail, the dynamic model of coupled train-bridge system subjected to earthquakes is established, in which the non-uniform characteristics of the seismic waves input from different foundations are considered. A computer simulation program is worked out. The case study is performed to a continuous bridge scheme on the Beijing-Shanghai high-speed railway in China. By inputting different typical seismic waves to the train-bridge system, the whole histories of the trains running through the bridge are simulated and the dynamic responses of the bridge and the vehicles are calculated. The effects of different traveling speeds and phases of the seismic waves on the dynamic responses of the bridge-vehicle system are studied, and many useful results are concluded.