Assessing the Vulnerability of Infrastructure Networks based on distribution measures

Giulio Galvan, Jitendra Agarwal

Research output: Contribution to journalArticle (Academic Journal)

2 Citations (Scopus)

Abstract

Infrastructure networks enable communities to be resilient by distributing essential services and supporting the relief and recovery actions necessary to bounce back from disruptive events. In order for infrastructures to play this central role, their own vulnerability needs to be assessed and managed. In this paper, a new distributional metric for vulnerability assessment is presented. Unlike existing methodologies, it aims at producing a characterisation of infrastructure vulnerability which accounts in full for the variability of the service delivery performance across disruption scenarios. The applications of the metric to theoretical configurations as well as real infrastructure networks are exemplified. These examples demonstrate that the proposed metric enables transparent and comprehensive information on the vulnerability of infrastructure networks. It is noted that the use of average values of system performance under different disruption scenarios may lead to unsafe conclusions about the system vulnerability. The proposed approach is also able to quantify the uncertainty in the vulnerability assessment of high-order scenarios. The paper also shows how the formalisation of the building blocks of vulnerability analysis made here, unifies many of the other methodologies found in the literature.

Original languageEnglish
Article number106743
Number of pages32
JournalReliability Engineering and System Safety
Volume196
Early online date11 Nov 2019
DOIs
Publication statusPublished - 1 Apr 2020

Keywords

  • Disruption Scenarios
  • Infrastructure Systems
  • Networks
  • Vulnerability Analysis

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