The invulnerability assessment of two-layer railway network under the uncertain environmental hazard risk

Abstract

The failure of the railway station or line will cause the reduction of the railway network efficiency and bring travel inconvenience to the passengers, especially for the key stations and tracks. Reasonable invulnerability assessment is beneficial to maintain the system operation ability and prevent passengers from abandoning railway when the uncertain environmental hazard risk is appeared. At present, larger numbers of research about the railway network invulnerability assessment are purely based on complex network theory, while ignored the nature of railways. In this paper, the Railway Network Invulnerability Model (RNIM) is introduced from the perspective of infrastructure network and service network, and the efficiency of the proposed RNIM is verified according to compare the structural connectively and functional accessibility using different attack strategies. Furthermore, the RNIM framework is applied on the China high-speed railway network, and the results show the validity of the proposed model for the invulnerability of railway network assessment in accurately and efficiently. Finally, some protection suggestions are proposed to reduce the negative effects after the inevitable disruptions emerged.