Seismic performance analysis of auxiliary pier of long-span cable-stayed bridge under seismic excitation

In order to overcome the problems of low accuracy and long-time, the seismic performance evaluation method of auxiliary pier of long-span cable-stayed bridge based on structural dynamics theory is designed considering the seismic excitation effect. First, the seismic performance evaluation standard is set. Then, the structure and dynamic characteristics of the auxiliary pier are analysed by using OpenSees finite element analysis software and structural dynamics theory. Finally, the natural vibration frequency and mode characteristics of the auxiliary pier are obtained. The seismic excitation is simulated to determine the damage degree corresponding to different earthquake damage levels, and the response of auxiliary pier is analysed. The evaluation index of seismic performance is set, and the evaluation result is obtained by comparing with the evaluation standard. The experimental results show that the proposed method has high evaluation accuracy and short evaluation time, which shows that this method has high practical application value.