Seismic Mitigation of Structures Using Direction-Optimized Friction Pendulum System

Abstract eng:
To enhance the capability of structures in seismic mitigation, in this study an advanced base isolation system called the direction optimized-friction pendulum system (DO-FPS) is proposed and investigated to address its mechanical behavior through finite element formulation and examine its efficiency in seismic mitigation by conducting a series of shaking table tests. Based on finite element formulation, it is revealed that the natural period, the capacity of the bearing displacement and damping effect for a Direction Optimized-Friction Pendulum System (DO-FPS) change continually during earthquakes. Therefore, DO-FPS can avoid possibility of resonance of enriched frequencies from ground motions and provide an effective capacity of bearing displacement and damping during the earthquakes. Simultaneously, results from the shaking table tests also illustrate that the DO-FPS isolator possesses an outstanding seismic mitigation capabilities.

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