评估突发事件情况下城市轨道交通(URT)网络的弹性对于提升URT的运营水平具有重要意义。考虑URT网络拓扑结构及乘客出行影响,提出了综合考虑网络拓扑结构及客流量的URT网络性能指标,并以突发事件情况下URT网络性能的恢复速率为指标衡量了URT网络的弹性,最后以成都地铁网络为例进行了分析。结果表明：URT网络性能损失与突发事件持续时间成正比,相比于非换乘站,因换乘站失效而导致的URT网络性能损失更高；URT网络弹性与突发事件持续时间成反比,URT运营部门可以通过采取加强设备维护、优化应急救援顺序等措施提升突发事件情况下URT网络的弹性。

Assessing the resilience of urban rail transit (URT) network under emergencies has practical significance to enhance the URT system’s operation. An URT network performance indicator which takes URT network’s topology structure and passengers’ travel into consideration is proposed here, and the URT network’s resilience is measured by taking URT network’s performance recovery rate as indicator. Finally, the resilience of Chengdu subway network under emergencies is analyzed by proposed models. The result indicates that the performance loss of URT network is in proportion to emergencies’ duration. Compared with non-transfer stations, the failure of transfer stations will lead to higher URT network performance loss. URT network’s resilience is inverse proportion to the duration of emergencies. For URT operator, the URT network’s resilience under emergencies can be improved by strengthening equipment maintenance and optimizing rescue sequence.

U239.5

国家重点研发计划项目(2017YFB1200700)