The safe operation of railroad systems is critical for socio-economic stability. This study investigates the train-bridge coupling vibration response of such a hybrid bridge under combined wind and wave action. A precise train-bridge coupling model was developed to simulate the aerodynamic behavior of the system across various wind speeds, and the results were validated against wind-wave exper- imental data. Additionally, wave loads on the composite foundation were calculated and applied in combination with wind loads to the train-bridge system, resulting in its dynamic response. Findings indicate that wave loading notably affects the transverse vibration response of the main girder, while its influence on vertical displacement and acceleration across the bridge span is minimal. In contrast, wind loading has a considerably greater impact on train operation safety, as the derailment coefficient of the train approaches the limit value of 0.8 at a wind speed of 30 m/s.
Luo et al. (Wed,) studied this question.