Theoretical Derivation and Seismic Design Method on Self-Centering Piers with ED Members Validated Using Numerical Simulations and Quasi-Static Tests

This paper presents the theoretical equations for computing the critical performance parameters of self-centering piers with and without energy-dissipating (ED) members. A structural fuses-based design method was proposed for developing self-centering piers with ED members, and two scale models of the self-centering piers with and without ED members were designed and constructed. The quasi-static tests and numerical simulations were conducted to verify the rationality of the theoretical derivation, the proposed design method, and the advantages of ED members on the seismic performance of the self-centering piers. The findings indicate that ED members undergo plastic deformation and dissipate energy before the ED bars yield, meeting the structural fuse concept. The theoretical performance parameters of specimens SCP and SCP-EDM matched well with the experimental and numerical results, such as the yield displacement, stiffness, and strength. Also, the ED members remarkably increase the strength, stiffness, and ED levels of self-centering piers.