Bidirectional shaking table test of concrete bridge pier with friction pendulum isolation system

Abstract

Bidirectional shaking table test of concrete bridge pier with friction pendulum isolation system (FPIS) is conducted in this study. It is confirmed that proposed bridge pier has oscillation frequency decreasing with sliding displacement, and the restoring force has an upper bound so that the force transmitted to the bridge pier and foundation is very limited. Effect of the curvature radius of FPIS, arrangement of bridge piers, and seismic intensity of transvers ground motion on the dynamic behavior of the bridge is investigated experimentally. Optimal variable surface of FPIS and arrangement of bridge piers to maximize the seismic performance is examined. Numerical simulation method for the proposed bridge pier with FPIS subjected to the bidirectional ground motions is also discussed herein.