Abstract: Based on the macro law of buildings damage under the earthquake, the road network connectivity was researched, which was influenced by the dominant collapsing direction of the damaged buildings. Firstly, the connectivity reliability of evacuation network (CREN) was defined; based on the connectivity analysis of the simple network and that of its equivalent network, a complex connectivity model of the equivalent network was established. And then the collapsing buildings dominant direction in historical earthquakes was analyzed; the related seismological research achievements and traffic theory were combined to study the influence of macroscopic law of earthquake damage on CREN after earthquake. Therefore, a road network connectivity estimation model based on the dominant direction of collapsing buildings under earthquake damage was established, and the systematic evaluation steps of the connectivity of the damaged road network were given. Finally, the application process of the proposed model was illustrated by an example, which provided a reference for the planning of buildings and road networks along the earthquake-prone areas.

Key words: traffic and transportation engineering, urban traffic, road network connectivity, emergency evacuation, building, dominant direction

摘要： 从地震作用下建筑物损害的宏观规律入手，研究震害建筑物倾倒优势方向性对疏散路网连通度的影响。首先定义了疏散路网连通度，在分析简单路径连通 度和其等效路网连通度的基础上，建立复杂等效路网的连通度模型。然后通过对历史震害资料中建筑物倾倒优势方向性的分析，将地震学研究成果和交通理论进 行有机结合，分析震害宏观规律对震后路网连通度的影响，建立了基于震害作用下建筑物倾倒优势方向性的路网连通度估计模型，给出了系统的震害路网连通度 评估步骤，并结合算例对模型应用过程进行说明，为地震多发地带沿线建筑及道路网规划提供参考。

关键词: 交通运输工程, 城市交通, 路网连通度, 应急疏散, 建筑物, 优势方向