The dominant frequency under wind-wave-undercurrent coupling is close to the natural vibration frequencies of several bridge modes, such that wind-wave-undercurrent coupling is more likely to cause a resonance effect in the bridge.
The results indicate that the displacement and acceleration of the front bearing platform top are more significant than those of the rear bearing platform. From time and frequency domain perspectives, the displacement and acceleration responses of the sea-crossing Rail-cum-Road cable-stayed bridge influenced by wave-only, wind-wave, and wind-wave-undercurrent coupling are comparatively studied.
The feasibility of the method is verified by comparing the tower top displacement response with relevant experimental data. In this paper, a fluid-structure separation solution method is implemented using Ansys-Midas co-simulation, in order to solve the above issues effectively while using less computational resources. The dynamic response of long-span Rail-cum-Road cable-stayed bridges is particularly severe under their influence, potentially leading to safety problems. Sea-crossing bridges are affected by random wind-wave-undercurrent coupling loads, due to the complex marine environment.
