Seismic response analysis of precast pier with different connection structures

Abstract:

To study whether the connection of precast piers can form a reliable force transmission mechanism and its seismic performance, based on a set of quasi-static tests of precast piers, we established finite element models of the test piers by ABAQUS and verified the effectiveness through test results. Then, the seismic dynamic responses of cast-in-place pier, precast pier with grouted corrugated duct connection, and precast pier with tenon-grouted corrugated duct connection were analyzed. Finally, the influence of axial compression ratio and reinforcement ratio on the seismic dynamic response of the precast pier with tenon structure was further studied. Results show that the dynamic responses of precast pier and cast-in-place pier were basically the same under the same structural form and seismic load. The displacement response, residual displacement, and plastic damage of precast pier with tenon were smaller than those with plane joint, and the seismic performance of precast pier with tenon was improved. Through parameter analysis, it was found that with the increase in the axial compression ratio, the displacement response and plastic damage of the pier were larger, and the shear response and seismic energy consumption were greater. With increasing longitudinal reinforcement ratio, the displacement response and plastic damage of the pier decreased, and the shear response increased, while the influence on the seismic energy dissipation was not significant in the range of 1% to 2%.