Resilience of metro systems subjected to external disturbances: A state-of-the-art review
Hao Bai , Dong-Ming Zhang , Jian-Min Guo , Yu-Shan Hua , Bilal M. Ayyub , Hong-Wei Huang , Enrico Zio
Resilient Cities and Structures ›› 2025, Vol. 4 ›› Issue (4) : 72 -96.
Metro systems are important transport infrastructures in megacities, and their long-term operational safety is challenged by frequent external disturbances, such as environmental extremes and human construction activities. A metro system must be resilient to resist, adapt to, and recover its performance when such disruptions occur. Current studies on metro system resilience often lack a comprehensive view from a complex system perspective, leading to a plethora of choices for methods of analysis and indicators applied to different metro systems and external disturbances. Therefore, the present paper aims to provide a comprehensive review of the topics and works revolving around the resilience of metro systems. It first clarifies the concept of metro system resilience based on classical definitions from a technical perspective. Metro resilience encompasses both the structural and operational aspects of metro systems, including their damage mechanisms, analysis methods and indicators of resilience. Methods for enhancing metro system resilience across structural, operational and monitoring dimensions are explored. Finally, future research directions are discussed, emphasizing the importance of considering the "system of systems" formed by interdependent infrastructure, refining uncertainty analysis, and investigating the opportunities arising from the application of artificial intelligence for improving metro system resilience against external disturbances.
Metro system / External disturbance / Natural hazards / Human-caused threats / Resilience
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