基于烈度分布的震后城市路网结构韧性分析  

Seismic Resilience Assessment of Urban Road Network Structure Based on Intensity Distribution

作　　者：谢菲 赵星[1] 申珂 Xie Fei;Zhao Xing;Shen Ke(College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学土木与交通学院,江苏南京210098

出　　处：《华东交通大学学报》2023年第3期55-65,共11页Journal of East China Jiaotong University

基　　金：江苏省自然科学基金项目(BK20211203)。

摘　　要：为了分析城市内部道路网络应对地震灾害时的韧性变化特征,首先考虑地震空间分布特性,结合各基础设施的综合震害分析,构建了基于烈度衰减分布的路段连通概率模型,识别脆弱路段;然后以此为基础提出了面向3个维度的路网结构抗震韧性多指标评估模型;最后结合实例对城市路网处于不同失效情景下的韧性表现进行分析。结果表明:少数路段失效时路网仍具有较强的韧性,在关键路段累积失效后会使得多方面网络韧性明显下降,路网运输效率降低,并且削弱了节点间的连接关系。The research objective is to analyze the seismic resilience change characteristic of urban road network.Firstly,considering the spatial characteristic of earthquake and the comprehensive earthquake damage of road infrastructures,a link connectivity probability model based on intensity attenuation distribution was constructed,thus vulnerable sections were identified.Then,the seismic resilience of specific network under different scenarios was analyzed using a network structural resilience assessment model which considered 3 dimensions.Evaluation results of the effects of these vulnerable links elimination in the network show that network resilience was still strong when a few roads cancelled,while this ability was significantly getting poor after the cumulative attack on the other vulnerable sections.Therefore,network transportation efficiency was reduced,and the connection between nodes were weakened.

关 键 词：城市道路网络 震害预测 烈度分布 韧性评估 韧性提升 

分 类 号：U491[交通运输工程—交通运输规划与管理]