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Earthquakes cause great damage to urban critical infrastructure systems, so it is important to assess and enhance the seismic resilience of urban critical infrastructure. There are two problems in the contemporary assessment of the resilience of critical infrastructure systems: the research on infrastructure systems focuses less on the function, which makes it difficult to restore the physical characteristics of the system. The consideration of the correlation relationship between infrastructure systems is not comprehensive enough. In this paper, a new functional simulation-based approach is proposed to assess the seismic resilience of interdependent urban electric power and gas systems under seismic effects. Function-based simulation modeling of the urban electric power system and gas system is performed, and DC current analysis is used to perform post-earthquake functional analysis of the electric power system and maximum flow algorithm is used to perform post-earthquake functional analysis of the gas system. The correlation relationships and cascading failures within each subsystem of the power and gas systems and between the two infrastructure systems are considered in the modeling. Interdependent links across infrastructure network systems are constructed by considering geographic and functional linkages between system components during the earthquake damage phase as well as the post-disaster restoration phase. Function-based disaster response and resilience assessment of linked infrastructures under seismic effects are realized. A combined restoration strategy between two systems is adopted to determine the restoration sequence of electric components and then match the optimal set of gas components based on the restoration time of each electric component, taking into account the correlation between electric and gas. The results show that the approach considering multiple correlations and based on functional simulation better simulates the fault propagation after a disaster and the dynamics of post-earthquake restoration, and the framework and restoration strategy proposed in this paper are more accurate and instructive for assessing resilience.

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A Function-Based Simulation Generalized Framework to Model Seismic Resilience of Interdependent Critical Infrastructure Systems

  • 会议论文

  • 发表日期：

    2025年

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  • Jingxuan Zhou,
  • Wei Liu

摘要

Earthquakes cause great damage to urban critical infrastructure systems, so it is important to assess and enhance the seismic resilience of urban critical infrastructure. There are two problems in the contemporary assessment of the resilience of critical infrastructure systems: the research on infrastructure systems focuses less on the function, which makes it difficult to restore the physical characteristics of the system. The consideration of the correlation relationship between infrastructure systems is not comprehensive enough. In this paper, a new functional simulation-based approach is proposed to assess the seismic resilience of interdependent urban electric power and gas systems under seismic effects. Function-based simulation modeling of the urban electric power system and gas system is performed, and DC current analysis is used to perform post-earthquake functional analysis of the electric power system and maximum flow algorithm is used to perform post-earthquake functional analysis of the gas system. The correlation relationships and cascading failures within each subsystem of the power and gas systems and between the two infrastructure systems are considered in the modeling. Interdependent links across infrastructure network systems are constructed by considering geographic and functional linkages between system components during the earthquake damage phase as well as the post-disaster restoration phase. Function-based disaster response and resilience assessment of linked infrastructures under seismic effects are realized. A combined restoration strategy between two systems is adopted to determine the restoration sequence of electric components and then match the optimal set of gas components based on the restoration time of each electric component, taking into account the correlation between electric and gas. The results show that the approach considering multiple correlations and based on functional simulation better simulates the fault propagation after a disaster and the dynamics of post-earthquake restoration, and the framework and restoration strategy proposed in this paper are more accurate and instructive for assessing resilience.