Seismic control of cable-stayed bridge using semi-active hybrid system

In this paper, the efficacy of semi-active hybrid control system for seismic protection of cable-stayed bridge is examined. The investigation is carried out on a simplified lumped mass finite element model of the Quincy Bay-view Bridge at Illinois. The bridge is isolated using a high damping rubber bearing (HDRB) along with the semi-active magnetorheological (MR) damper to form semi-active hybrid control system. For the MR dampers, a control algorithm based on the Lyapunov stability theory is employed. The HDRB is modeled with linear spring and dashpot; and various dynamic models, such as a Bingham model, a Bouc-Wen model, and a modified Bouc-Wen model are used for the MR damper. The bridge is also analysed under the variation of command voltage input to MR Damper. The results of semi-active hybrid system are compared with those obtained with passive hybrid systems composed of isolation with passive viscous damper. The simulation results indicate that the performance of the semi-active hybrid control syst...

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