Retrofitting Transportation Systems to Ensure Resiliency

Abstract eng:
This paper presents a seismic risk assessment of the transportation network in Charleston, SC, to support the development of mitigation strategies and emergency planning and preparedness efforts. In particular, this study focuses on the impact of retrofit on reducing the expected damage and improving the resiliency of the network. This study includes an inventory analysis of the roughly 375 bridges in the Charleston area, and convolution of the seismic hazard with fragility curves analytically derived for classes of bridges common to this part of the country, and replacement cost estimates using relevant region-specific data. Using state-of-the-art tools, the distribution of potential bridge damage and functionality is evaluated for several scenario events and several retrofit strategies. The results show that retrofitting bridges based on retrofitted bridge fragility curves can be an effective way to reduce the economic losses and improve the resiliency of the system.

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