A framework to evaluate functional impairment of elevated bridge systems during a seismic event is proposed. Firstly, by analyzing the data associated with the damage of structural components of elevated highway bridges on route No.3, Hanshin Expressway, the fragility curves of a deck, a pier, and a bearing are derived. Secondly, by combining the fragility curves and seismic hazard map, the framework to derive the seismic loss function and the risk profile including the information associated with the direct and indirect loss due to the seismic damage of a bridge is shown. Finally, based on the framework, case studies of the variation of seismic hazard and the effect of traffic delay are carried out.
