Vibration Control of Highway Bridge Under Earthquakes

by Zhikun Hou, Worcester Polytechnic Inst, Worcester, United States,
Gongkang Fu, Worcester Polytechnic Inst, Worcester, United States,



Abstract: Seismic base isolation for highway bridges may increase relative displacement, while reducing the acceleration and base force. Elastomeric bearings with lead plug for base isolation may be restricted by its stability and geometric requirements. This study shows the potential of hybrid control in reducing bridge response of base force, acceleration, as well as relative displacement. Stochastic optimal control for bridges under nonstationary earthquake excitation is employed here. Thus, further research on active control applied to protecting the bridges is worthwhile.

Subject Headings: Highway bridges | Base isolation | Earthquakes | Vibration | Seismic tests | Seismic effects | Displacement (mechanics)

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