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EXPERIMENTAL STUDY OF FPS SYSTEM IN BRIDGE SEISMIC ISOLATION
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1996
Year
Geotechnical EngineeringBridge DesignEarthquake EngineeringVibrationsEngineeringStructural DynamicsSeismic AnalysisCivil EngineeringSeismic IsolationMechanical SystemsShake TableVibration IsolationStructural DynamicStructural MechanicsIsolated BridgeVibration ControlBridge ModelStructural Engineering
An experimental study of a seismically isolated and a comparable non-isolated bridge is presented. The bridge model featured flexible piers, weighed 158kN and was tested on a shake table with an array of real and simulated seismic motions with peak acceleration in the range 0⋅1–1⋅1g. When isolated, the bridge deck was supported by four spherically shaped sliding bearings (known as Friction Pendulum System or FPS bearings) with friction coefficient under dynamic conditions in the range 0⋅07–0⋅12. The experimental results demonstrated a substantial improvement in the ability of the isolated bridge to sustain all levels of seismic excitation under elastic conditions.