To enhance the seismic performance and seismic resilience enhancement of curved beam bridge piers, polyurethane cement (PUC) is adopted for pier retrofitting. Material mechanical tests on PUC specimens and shaking table model tests with a geometric scale of 1:10 under earthquake loading levels ranging from 0.2g to 0.6g on unreinforced and reinforced piers are performed to reveal their seismic response characteristics, and a refined numerical model of curved piers is built on the OpenSees platform for mutual validation of experimental and numerical results. Test results indicate PUC has a compressive strength of 72.0 MPa, which is approximately 1.8 times the standard value (40 MPa) of the commonly used C40 concrete cube in engineering. Compared with superior deformation coordination and interfacial adhesion over conventional repair materials. PUC retrofitting effectively restrains the coupled flexural-torsional deformation of curved piers; under the 0.6g major-earthquake condition, the lateral displacement is reduced by 46.28% and the torsion angle by 51.76%, presenting a more prominent suppression effect on torsion, markedly inhibiting residual plastic deformation accumulation. The hysteretic energy dissipation capacity of the reinforced rear pier is significantly enhanced; stress concentration at the pier base is alleviated; plastic damage is distributed more diffusely from the pier base to the rest of the pier structure; and the damage mode is optimized. Furthermore, finite element analysis error is controlled within 5%, verifying reliable calculation accuracy. This research proves PUC can significantly upgrade the seismic performance of curved beam bridge piers and provides technical references for seismic retrofitting of analogous curved bridges.
