A time-dependent seismic resilience analysis approach for networked lifelines Paredes, Roger; Dueñas-Osorio, Leonardo
This paper presents an integrated resilience-based modeling approach for assessing the resilience of coupled networked lifeline systems considering as input-spaces their capacity, fragility, and response actions, including those informed by engineering and community-based policy. We develop a time-dependent resilience concept for systems under seismic hazards, which rests upon a flow-based core for assessing performance while considering interdependencies among them. This approach relies on robust mathematical optimization techniques for studying distributed systems and their ability to allocate limited resources in time during the recovery process. The proposed approach not only outperforms typical connectivity based assessments with a better physical approximation of lifelines, but also is proven practical computationally as it enables sensitivity assessments to redundancy, robustness, and resourcefulness in the context of interdependent lifelines geared towards improving resilience. For lifeline benchmark models we found that provisioning a minimum size of restoration can increase time-dependent resilience as much as 25% for relatively fragile systems.
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