Full Session with Abstracts
Coastal flooding due to hurricane storm surge poses a significant threat to near-shore communities for the United States and many other coastal areas around the world. Various mitigation measures have been developed to reduce infrastructure vulnerability. This research proposes an engineering-based method to evaluate the influence of different flood mitigation strategies on residential structural vulnerability. A force–equivalency methodology is used to convert available tsunami fragility curves to coastal flood fragility curves. The coastal flood fragility curves are then translated into vulnerability curves by summing up the products of conditional damage probabilities for a set of defined damage states and their corresponding damage ratios. Mitigation strategies are then modeled to alter the vulnerability curves. The mitigation strategies studied are floor elevation, elevation of utilities, wet proofing and dry proofing. To evaluate the effectiveness of the strategies, the mitigated results are compared with the vulnerability curves of typical unmitigated residential structures, encompassing timber and masonry structures with one or two floors. The proposed method provides a useful tool to help decision makers assess coastal flood mitigation measures on a quantitative basis. This engineering-based vulnerability assessment method is currently being implemented in the Florida Public Hurricane Loss Model (FPHLM).