Abstract：To investigate the seismic performance of precast segmental bridge piers with column-to-footing connection using grouted corrugated duct with and without mortise-tenon and evaluate their vulnerability under earthquake, the damage states of a cast-in-place pier and two precast piers are studied by quasi-static tests according to the characteristics of the joints at the bottom of precast segmental bridge piers. In these tests, the drift ratio of the pier top is taken as the damage index to describe the damage state, and the quantified damage index limits Dcr、Dcy、Dcm and Dcu are determined for different damage levels. The finite element software is used to analyze the time history responses of cast-in-place and precast bridge piers under different earthquake intensities, and the probabilistic seismic demand model is established to evaluate their vulnerability. The influences of parameters including the axial compression ratio and longitudinal reinforcement ratio on the vulnerability of precast segmental bridge piers are further studied. Although most of the failure modes of precast and cast-in-place piers are bending failure, the damage states differ due to the connection type; the seismic vulnerability of precast pier with grouted corrugated duct connection is not evidently different from that of cast-in-place pier, and moreover their seismic performance is basically the same; for precast segmental bridge pier with mortise-tenon joint, the occurrence probabilities of four kinds of damage levels are the smallest under different levels of earthquake actions. With the increase of axial compression ratio or the decrease of reinforcement ratio, the damage probability of pier tends to increase.
