A novel, multi-spherical, sliding friction isolation bearing for seismic design of bridges is developed in this paper. The configuration characteristics, operation and sliding mechanism are explained. The nonlinear restoring model is presented and the simplified calculation formula of force-displacement relationship of the bearing with identical friction coefficient of frictional interface is established. Experiment of mechanics performance is carried out and the sliding order and the force-displacement relationship are verified. The results show sliding order in theoretical analysis and experimental observation is identical and force-displacement relationship curve derived from theoretical analysis is well agreed with experimental results. The multi-spherical sliding friction isolation bearing has good energy dissipation capacity, horizontal displacement capacity, designated re-centering function, smart stiffness and smart damping behavior under different intensity amplitudes external excitation as it can optimize the parameters of an isolation system for a given bridge based on multiple performance objectives or multiple earthquake levels. These characteristics make the proposed bearing suits for performance-based seismic design of bridges for multiple levels of ground shaking.
Behavior of Multi-Spherical Sliding Friction Isolation Bearings
10th Asia Pacific Transportation Development Conference ; 2014 ; Beijing, China
2014-05-05
Conference paper
Electronic Resource
English
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