面向应急疏散的山区特征路网通路分析

针对山区地形地貌特点及山区路网形态特征，提出了山区特征工字型路网的基本概念；采用时间成本分析方法，对山区特征工字型路网的关键通道在相邻两端的周边路网影响范围进行了边界界定；运用图论及流体网络理论，对山区特征工字型路网进行了通路分析，采用引入虚节点和虚分支的方法，提出了山区特征工字型路网的通路求解方法。通过算例对山区特征工字型路网进行了通路分析及其求解。

Pathway Analysis of the Mountainous Characteristic Road Network for Emergency Evacuation

According to conditions of landform in mountain area and features of mountainous road network, a concept of mountainous characteristic I Shaped road network was presented. By adopting time cost analysis method, finite impact ranges of key pathway and its adjoining pathway surrounding road networks were defined. Using graph theory and fluid network theory, the analysis of pathways to mountainous characteristic I Shaped road network was carried out. With the ways of virtual node and virtual branch, pathway algorithm of mountainous characteristic I Shaped road network was provided. The calculated process of the analysis of pathways to mountainous characteristic I Shaped road network was illustrated through numerical example, which shows that it provides guidance for determining an optimal route to evacuation and evacuation management in the calamity events.