Integrating interdependency effects into coastal bridge resilience against hurricane-induced waves within a life-cycle context
Abstract
The life-cycle hurricane resilience assessment of coastal bridges plays an important role in guiding decisions for their long-term operation and maintenance. Although some studies focused on bridge resilience under other disasters, there remains a paucity of resilience assessment methods associated with hurricanes and extreme waves. To address this issue, this study proposes a three-step resilience assessment framework to evaluate structural performance under hurricane hazards. Such a framework improves the existing method from the following aspects: (a) characterization of structural responses under extreme waves using a numerical based Pseudo-Fluid-Structure-Interaction (PFSI) scheme, (b) consideration of the restoration of interdependent infrastructure systems at the pre-recovery phase, and (c) multiple resilience indices that integrate the effects of resources and recovery time. The developed framework is illustrated using a high-risk coastal bridge. A multi-criteria optimization problem is formulated to examine the practical value of the proposed resilience indices. The results of the developed framework are compared with the method without considering the effects of time delay, which shows that the bias could reach 15% under extreme cases. The proposed approach could facilitate decision-making by integrating multiple performance indices of coastal bridges into the decision-making process, thereby aiding decision-makers in optimizing their objectives.
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