Random wave forces on the submerged box-girder superstructure of coastal bridges based on potential flow theory

The hydrodynamic performance of the box-girder superstructure under extreme random wave conditions in actual ocean environment is focus coastal bridge designers and researchers. This paper proposed an analytical method to estimate forces on based potential flow theory correction parameters. accuracy validated by classical problem about force rectangular structure, empirical methods previous researchers, experiment conducted authors within application range method. With method, a parametric study carried out explore influence peak frequency incident spectra structural configuration submerged superstructure. Results show that parameter, including relative deck thickness, girder width, height affects horizontal more significantly than vertical force. A larger ratio wavelength width results smaller when dimensionless number 1.0. It great significance consider effect waves superstructures using waves.