城市交通网络在遭受地震破坏后,其中部分单元还会因次生灾害和突发事件遭受进一步的破坏。网络单元的相继故障则会使破坏的范围和影响扩大,给救援工作带来灾难性的后果。在评估震后路段剩余容量的基础上,采用“负荷-容量”模型从网络的整体效率、连通程度和路段的拥堵程度等多个角度,研究了网络节点遭受破坏后的级联失效后果。结果表明,不同节点失效下的级联失效后果存在明显的差异,拥堵引发的级联失效会严重降低交通效率,甚至造成救援中断。所提方法可供震后交通应急管制和重要网络单元的保护参考。 After the urban traffic network was damaged by the earthquake, some of its units were further damaged due to secondary disasters and emergencies. The successive failure of network elements will expand the scope and impact of the destruction and bring disastrous consequences to the rescue work. On the basis of evaluating the remaining capacity of post-earthquake residuals, the “load-capacity” model is used to study the consequences of cascade failure after the network nodes are destroyed from the aspects of overall network efficiency, degree of connectivity and congestion degree of road segments. . The results show that there are obvious differences in the consequences of cascade failure under different node failures. The cascade-induced cascade failure will seriously reduce the traffic efficiency and even cause the rescue interruption. The proposed method can be used for emergency traffic control after the earthquake and important network unit protection reference.