ABSTRACT
The shape memory alloy (SMA) is a type of advancing material with flag-shaped hysteretic behavior. Compared with the conventional bridge, the SMA-steel reinforced bridge can mitigate seismic hazards due to its self-centering characteristics. The economic cost and carbon dioxide emissions of producing the SMA material are relatively higher compared with conventional steel. Within the life cycle of bridges, multiple earthquakes and continuous deterioration can occur resulting in accumulated consequences. It is necessary to conduct a cost-benefit analysis in a life-cycle context. In this study, the life-cycle earthquakes are modeled using a stochastic process. The deterioration is modeled to compute the time-dependent seismic fragility by considering the chloride attack. The life-cycle benefit of the SMA-steel reinforced bridge is computed in terms of sustainability (e.g., social, economic, and environmental aspects) and resilience. The economic and environmental cost of constructing the novel bridge is obtained from historical data. The life-cycle cost-benefit analysis is finally conducted. The advantages of the novel bridge are revealed in a life-cycle context, which can aid the design of bridges for a sustainable and resilient future.
