Research on Topological Risk of Expressway Networks
Based on topological and functional natures of the expressway networks, this paper uses the graph theory and builds up the concept of expressway networks, and defines the network component nature. By referring to the risk theory, it analyzes the content of topological risk of expressway networks and builds the topological risk measures including the heterogeneity measures, connectivity measures and survivability measures. In view of the interconnected relationship between topological risk measures, a method framework oriented assessment of topological risk of expressway networks is established. Combining the situation of the project, setting the expressway networks of Beijing, the results suggest that the topological risk measures can reflect the risks in the expressway networks structure level, the risk evaluation results are in accordance with the real situation of expressway networks.