Dynamic analysis of a long span cable-stayed bridge combined with train and turbulent wind

The dynamic interaction of coupled high-speed train and long span combined road and railway cable-stayed bridge under wind action is studied and analyzed by establishing a computational model of wind-train-bridge system. The vehicle subsystem model is established by the rigid body dynamics method, the bridge subsystem model is considered by the finite element method. The wind forces, including steadystate and buffeting forces acting on the bridge and the train respectively are generated in time domain using computer simulation techniques. The linear dynamic equilibrium equations for the vehicle-bridge System are modeled, in which track irregularities are taken as inspiration to the system. The histories of dynamic response with wind loads demonstrate that the dynamic analytical model of vehicle-bridge system versus train speed is shown. The computer simulation method proposed in this paper can efficiently reflect the vibration characteristics and the results show that wind has great influences on the train-bridge system.