Experimental Study of Rocking Seismic Isolation of Bridge Pier with Pile Foundation

Abstract

Seismic isolation technique for bridge can dissipate the earthquake input energy by separating superstructure from the foundation. Rocking seismic isolation of bridge pier is an effective approach to improve seismic resistance performance of bridges. The free rocking and controlled rocking with inhibiting steel bar were adopted in this study. Quasi-static tests for two 1/10 scale model piers of a typical railway bridge pier with pile foundation were performed to investigate the seismic performance of the controlled rocking seismic isolation of bridge pier. Through the hysteretic behaviors, it can be concluded that the two rocking seismic isolation model pier by using the inhibiting steel bar shows better seismic performance than the free rocking seismic isolation model pier.