An efficient and accurate method of added mass for evaluating the seismic hydrodynamic effect of deep‐water piers

Due to the effects of complex fluid‐structure interaction, deep‐water bridges are more prone to damage under strong earthquakes. Quantification of seismic fluid‐structure interaction can be crucial for evaluating the seismic performance of deep‐water bridges. Currently, there is a lack of suitable methods for rapidly calculating hydrodynamic added mass for deep‐water piers with complex cross‐sectional shapes in the seismic performance assessment of deep‐water bridges. In light of this, the present paper proposed an efficient and accurate method for calculating the hydrodynamic added mass of piers with different cross‐sectional shapes. Taking circular, rectangular, and dumbbell‐shaped piers as examples, the proposed method was employed to calculate the hydrodynamic added mass for deep‐water bridge piers. Comparison of the seismic responses obtained from the analytical formula, fluid‐structure coupling refined numerical model and the proposed method in this paper validated the accuracy of the proposed method. Finally, the hydrodynamic coupling effects of deep‐water bridge piers were also investigated. It was concluded that the proposed method can be efficient and accurate for obtaining the added mass of deep‐water piers.