Seismic Analysis Method of Deep-Water Bridge Pier and Water Coupling

To adopt a right method to calculate hydrodynamic pressure, a novel method, combining the Morison equation with CFD (computational fluid dynamics), for calculating the seismic responses of a deep-water bridge under pier-water coupling was proposed. The results based on the ANSYS-CFX model show that the proposed method can calculate the seismic responses of a deep-water bridge under pier-water coupling effectively. A deep-water environment will decrease the maximum elastic displace-ment at pier top, but it will increase the maximum rigid displacement and the total stsructure displacement. Additional hydrodynamic pressure generated by rigid motion plays a major role, and the effect of elastic vibration must be considered.