四川省高速公路网韧性分析

Analysis of the Resilience of Sichuan Expressway Network

摘要: 为进一步深入研究交通网络韧性的量化评估问题，本研究以四川省高速公路网为对象，采用基于L空间的网络构建方法建立拓扑模型，并引入高速公路实际O-D出行分布，从路径冗余性和路网鲁棒性两个维度开展韧性分析。研究结果表明：在路径冗余性方面，四川省高速公路的路径冗余性低于京津冀、长三角和粤港澳地区，并且21个市(州)之间存在较大差异，成都市高速公路网的平均冗余性处于中等水平。此外，当更多拓扑结构中的“圈”被有效路径使用时，路径冗余性会增加。在路网鲁棒性方面，四川省高速公路网在蓄意攻击策略下具备一定的鲁棒性，但在叠加交通流量后表现出对蓄意攻击的脆弱性。

Abstract: To further investigate the quantitative assessment of transportation network resilience, this study focuses on the Sichuan Province expressway network. A topology model is established using an L-space-based network construction method. On this basis, the actual O-D (origin-destination) travel distribution of the expressways is introduced to conduct resilience analysis from two dimensions: route redundancy and network robustness. The results indicate that, in terms of route redundancy, the Sichuan expressway network exhibits lower redundancy compared to the Beijing-Tianjin-Hebei, Yangtze River Delta, and Guangdong-Hong Kong-Macao regions, with significant variations across the 21 cities, and the average redundancy of Chengdu’s expressway network ranks at a moderate level. Additionally, route diversity increases when more topological cycles are traversed by numerous alternative routes. In terms of network robustness, the Sichuan expressway network demonstrates a certain degree of robustness under intentional attack strategies, but when traffic flow is considered, it exhibits vulnerability to such attacks.