Shaking table tests of bridge model with sliding friction isolation bearings
WEN Jianian;LI Hongying;HAN Qiang;DU Xiuli;Key Laboratory of Urban Security and Disaster Engineering of MOE,Beijing University of Technology;
Sliding friction isolation bearing has good capacity of energy dissipation,large horizontal displacement and durability,providing a new approach for the seismic isolation design of bridge. In this paper,shaking table tests of bridge model with a friction pendulum bearing,double concave friction pendulum bearing,multi-spherical sliding friction bearing were conducted. By observing and measuring the displacements,accelerations and other reactions of bridge model,the response characteristics and isolation effect of the bridge with three sliding friction bearings were obtained,the results that isolation bearing can reduce the impact of earthquakes on the superstructure of the bridge effectively were illustrated. And the self-vibration period of the bridge with sliding friction isolation is only relevant with the friction coefficient and the equivalent radius of curvature of the isolation bearing.