Abstract
Taking an asymmetric single-tower cable-stayed bridge as the research object, this paper investigates the effects of seismic mitigation measures for the bridge under the earthquake. Three kinds of damping measures including lead-rubber bearings, viscous dampers and a hybrid seismic mitigation system are suggested. Firstly, parametric analyses have been performed so as to obtain the optimal parameters of the lead-rubber bearings and the damping coefficients of the viscous dampers for the bridge. Then, the hybrid seismic mitigation system combined by lead-rubber bearings and viscous dampers are considered. The effects of these seismic mitigation measures on the bridge have been compared and the results show that these three measures can effectively reduce the seismic responses of the bridge, but the hybrid seismic mitigation system has a better performance than the other two.
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