基于网络拓扑及交通特性的城市路网弹性评价

Evaluation of Road Network Resilience Based on Network Topology and Traffic Characteristics

为了更好地应对城市道路的局部灾害,需对城市路网的抗灾能力进行评价。文章回顾了路网弹性的内涵,从路网拓扑结构和路网交通特征两个层面出发,提出路网弹性指数的概念并给出了量化方法:①基于复杂网络理论,分析了城市道路网络拓扑结构的特性,构建了基于节点度、中介中间度、接近中间度的节点拓扑指数;②基于交通量和富余饱和度指标构建了节点交通指数,并提出计算模型。

In order to better deal with the local disasters of urban road network,it is necessary to evaluate the resilience of urban road network.The concept of the resilience of road network was summarized based on the literature reviews of relevant published papers.According to topological structure and traffic characteristics of the road network,the concept“resilience indicator of road network”(RIRN)was proposed,and two quantitative methods were given:(1)Based on the complex network theory,the characteristics of the topological structure of urban road network was analyzed and a topological index was structured associated with node degree,intermediate centrality and closeness centrality;(2)Meanwhile,a traffic index was structured associated with traffic volume and surplus saturation degree.A calculating method of RIRN was proposed and applied to the network in Jinshan Area of Fuzhou,China,for purpose of illustration.This paper highlights the effects of traffic characteristics on the resilience of road network and extends the research method in planning urban road networks,traffic management and disaster prevention.