The reliable and safe operation of urban public transportation (UPT) system is of great significance to the sustainable development of city. The in-depth analysis of UPT network from topological structure and passenger travel features will help to understand the mechanism of the reliable operation of UPT. Based on the complex network theory, we proposed a robust model from the structure and function perspective for Bus-Subway double-layered network (B-S DLN). The indicators of average path length (APL), relative size of giant component (RSGC) and global network efficiency (GNE) are used to quantify the structural robustness of B-S DLN. And the functional robustness is measured through the indicator of ratio of passenger flow loss (R). Using the urban traffic data in Xicheng District of Beijing, we analyzed the cascading failure of B-S DLN by a nonlinear load-capacity model with two capacity control parameters of a and b. The simulation results show that: a and b have a significant impact on the cascading failure process. The increase in b or decrease in a both can enhance the network ability to resist cascading failure. By the parameter control method, it was found that the B-S DLN can obtain the strong robustness when a=0.2 and b=0.5. By comparing the network robustness under random attack and intentional attack, it was found that the robustness of B-S DLN under intentional attack is even stronger than the random attack mode, indicating that the robustness of B-S DLN can be significantly improved by rationally increasing the capacities of stations.

CICTP