Disaster Resilience Management of Civil Infrastructure Systems based on Reliability, Redundancy, and Recoverability

Abstract

As the complexity of civil infrastructure systems is ever-increasing amid various uncertainties, their resilience against natural and human-made disasters should be managed based on a holistic understanding of the systemsﾒ performance under hazards. To address this need, the authorﾒs research group recently proposed a system reliability-based framework characterizing disaster resilience by three criteria: reliability, redundancy, and recoverability. In particular, the reliability and redundancy indices were defined to quantify the systemﾒs component- and system-level abilities against initial disruption scenarios and their cascading effects, respectively. The pairs of the indices are visualized in a scatter plot termed "diagramﾔ to facilitate resilience-informed decision-making. After briefly reviewing the framework, this paper introduces its recent applications to a real-world cable-stayed bridge under tank truck fire hazards and complex infrastructure networks under seismic hazards, demonstrating its benefits and potential in the disaster resilience management of complex civil infrastructure systems. The paper also introduces the ongoing development of a resilience-based decision optimization algorithm to automate resilience-informed decision-making processes as a core technology supporting risk intelligence of civil infrastructure systems.