城市综合体建筑火灾灾害链风险分析

为降低城市综合体建筑火灾演化过程中的影响，基于灾变链式理论和复杂网络理论，通过分析城市综合体火灾灾害中的致灾因子、孕灾环境、承灾体等因素，构建城市综合体火灾灾害链网络模型。利用出入度、子网节点数、介数中心度等指标，综合评估灾害链网络中节点的重要度与边的脆弱性，得出影响灾变的关键节点以及断链的位置，为减缓综合体建筑火灾带来的灾害提供参考。结果表明：灾害链中脆弱性较大的边与重要度较大的节点具有一定的关联性，在城市综合体建筑火灾演化过程中，地面交通瘫痪、人群恐慌、过街天桥受损、地铁站受损、爆炸是风险控制的关键节点。

Risk analysis of fire disaster chain for urban complex building

In order to reduce the impact of the fire evolution process of urban complex buildings, the chain-styled theory of disaster and complex network theory were identified for expressing the accident. The network models of fire disaster chains evolution of urban complex was established from the hazard factors, the disaster-pregnant environment, the hazard bearing body and other factors. Then, the risk analysis was carried out by the out-in degree, the number of subnet nodes, the betweenness centrality and other indicators during the disaster evolution. Comprehensively evaluate the importance of the network nodes and the vulnerability of the edges of the disaster chain, we can get the key nodes that affect the disaster and the location of the broken chain. This analysis provides references for mitigating disasters caused by fires in complex buildings. It is concluded that, the more vulnerable edges in the disaster chain have a certain correlation with the more important nodes. During the evolution of urban complex building fires, traffic tie-up, crowds panic, damaged overpasses, damaged subway station and explosion are the key nodes of risk control.