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Abstract
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The continuous operation of critical infrastructures such as electricity, gas, and water networks is one of the major fundamentals of a sustainable city considering their interdependency. Regarding the interdependency of these infrastructures, an interruption in each one can cause severe deficiencies and a lack of energy supply sustainability in the other infrastructures. Additionally, multi-hazard disasters have always been a threat to a well-constructed multi-infrastructure energy system (MIESs). MIESs can simultaneously be exposed to multiple high impacts of different disasters with a low probability. Its consequences may overlap with other hazards and lead to temporal or permanent damages for infrastructures’ components. This paper studies the resiliency of a MIES, including the interdependence of natural gas and electricity networks affected by multi-hazard disasters such as hurricane and earthquakes. The impacts of different hazards with various levels are modeled using multi-phase performance response curves to determine the time-dependent performance levels of the MIES in different phases. The impacts of hazard levels on component and system performance are analyzed, and node resilience criteria are employed for various energy subsystems to evaluate the resilience of the MIES. Based on the results, the simultaneous occurrence of the different hazards on interdependent infrastructures can boost and overlap the impact of a single hazard on the MIES.
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