Seismic response analysis of CFST composite column frame piers

Concrete filled steel tubular (CFST) structure can effectively combine the properties of steel tube and concrete. The structural displacement, internal force and energy consumption of the pier under earthquake are calculated by time history analysis method. The seismic performance of CFST composite pier after the corresponding structural parameters are changed is predicted. Under the given seismic load, the pier concrete and steel tube have different degrees of plasticity. Concrete damage consumes the energy input into the structure by the earthquake to a certain extent, and the existence of steel tubes makes the overall stability of the structure better.