Experimental study of seismic performance for the double-chambers thin-wall concrete pier

According to the double-chambers thin-wall concrete pier of an actual cross-sea viaduct bridge, the test model of double-chambers thin-wall concrete pier which of the size ratio is 1:10 was designed. Then the test of reversed cyclic lateral load was processed to evaluate the seismic performance of concrete pier, and the actual cracking moment, initial yield moment, full yield moment and ultimate bearing capacity of the pier were determined. Finally, the failure morphology, stiffness degradation, longitudinal reinforcement strain of pier and the friction force of loading device were analyzed. Experimental results show the experimental double-chambers thin-wall concrete pier has the outstanding seismic performance and the failure morphology is ductile failure. According to the experimental result of model pier, the cracking moment, initial yield moment, total yield moment and ultimate bearing capacity of actual pier were determined, which is basically same to the results obtained by FEM. And the experimental results were verified the accuracy and safety of the actual pier design.