台座式连接预制拼装桥墩抗震性能研究OA

To investigate the seismic performance of precast assembly bridge piers with pedestal connection,quasi-static tests were conducted on two scaled specimens of precast bridge piers.The damage process,failure modes,and seismic performance indicators were examined.A nonlinear solid finite element model was devel-oped using Diana and validated against the test results.Based on the validated finite element model,design pa-rameters such as pedestal size and reinforcements were analyzed and studied.Results show that the precast as-sembly bridge piers with pedestal connection ultimately experience flexural failure,characterized by the forma-tion of plastic hinge at the top edge of pedestal at the pier bottom,while the pedestal connection zone and as-sembly joints remain basically intact.The precast assembly bridge piers demonstrate seismic performance com-parable to that of cast-in-place concrete bridge piers.The established finite element model can effectively re-produce crack pattern,damage progression,and load-displacement response of precast assembly bridge piers with pedestal connection.To ensure the reliability of pedestal connection anchorage,appropriately increasing pedestal height,width,and reinforcements can better improve the stress state in the pedestal zone.