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A double-weighted vulnerability assessment model for metrorail transit networks and its application in Shanghai metro
International Journal of Critical Infrastructure Protection ( IF 3.6 ) Pub Date : 2020-06-18 , DOI: 10.1016/j.ijcip.2020.100358
Yanjie Zhang , Bilal M. Ayyub , Yalda Saadat , Dongming Zhang , Hongwei Huang

The vulnerability assessment of urban metrorail transit (or simply metro) networks is of great significance for a large scaled metro network to ensure the safe and sustainable operation. Comparing to the traditional model, this paper presents a modified double-weighted vulnerability analysis model for metro networks by taking account of the path distance and passenger flow as they are the two key features of a metro network. In this model, a link-weighted adjacency matrix was established based on which a node-weighted network efficiency was formulated considering the distance of path and the ridership between any two metro stations. The model was then applied to Shanghai metro to examine its vulnerability with failure scenarios at different scales from node failure, link failure to line failure. The network vulnerability was examined by the decrease in network efficiency. Results show that metro stations with high node degree and large ridership greatly contribute the influence on global network efficiency. It is identified from the double-weighted network model that Shanghai metro is more vulnerable to the failure of Lines 8 to 10, rather than Line 1, Line 2 and Line 11 obtained from the traditional unweighted network model. In this study, the most vulnerable metro stations, links and lines can be derived with consideration of path distance and passenger flow, which could provide guidance for reasonable resource allocation in system maintenance and aid the decision on recovery strategies for resilience of metrorail system.



中文翻译:

地铁轨道交通网络双权脆弱性评估模型及其在上海地铁中的应用

城市地铁(或简称地铁)网络的脆弱性评估对于确保大规模,安全的地铁网络具有重要意义。与传统模型相比,本文通过考虑路径距离和客流作为地铁网络的两个关键特征,提出了一种改进的地铁网络双加权脆弱性分析模型。在该模型中,建立了一个链路加权的邻接矩阵,在该矩阵的基础上,考虑了路径距离和任何两个地铁站之间的乘客量,制定了一个节点加权的网络效率。然后将该模型应用于上海地铁,以从节点故障,链路故障到线路故障等不同规模的故障场景检查其脆弱性。通过网络效率的降低检查了网络漏洞。结果表明,节点度高,乘客量大的地铁站对全球网络效率的影响很大。从双重加权网络模型可以看出,上海地铁更容易遭受8至10号线的破坏,而不是传统的非加权网络模型所产生的1号,2号和11号线的故障。在这项研究中,可以在考虑路径距离和客流的情况下得出最脆弱的地铁站,链接和线路,这可以为系统维护中的合理资源分配提供指导,并有助于决定地铁系统的恢复策略。结果表明,节点度高,乘客量大的地铁站对全球网络效率的影响很大。从双重加权网络模型可以看出,上海地铁更容易受到8至10号线故障的影响,而不是传统的非加权网络模型所产生的1号线,2号线和11号线的故障。在这项研究中,可以在考虑路径距离和客流的情况下得出最脆弱的地铁站,链接和线路,这可以为系统维护中的合理资源分配提供指导,并有助于决定地铁系统的恢复策略。结果表明,节点度高,乘客量大的地铁站对全球网络效率的影响很大。从双重加权网络模型可以看出,上海地铁更容易受到8至10号线故障的影响,而不是传统的非加权网络模型所产生的1号线,2号线和11号线的故障。在这项研究中,可以在考虑路径距离和客流的情况下得出最脆弱的地铁站,链接和线路,这可以为系统维护中的合理资源分配提供指导,并有助于决定地铁系统的恢复策略。第2行和第11行是从传统的非加权网络模型获得的。在这项研究中,可以在考虑路径距离和客流的情况下得出最脆弱的地铁站,链接和线路,这可以为系统维护中的合理资源分配提供指导,并有助于决定地铁系统的恢复策略。第2行和第11行是从传统的非加权网络模型获得的。在这项研究中,可以在考虑路径距离和客流的情况下得出最脆弱的地铁站,链接和线路,这可以为系统维护中的合理资源分配提供指导,并有助于决定地铁系统的恢复策略。

更新日期:2020-06-18
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