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震后起火是国外几次大震的普遍现象。本文通过对国外几次震后火灾的对比分析，归纳总结了引发震后火灾的主要因素及震后火灾的特点。震后火灾与生命线系统的破坏有密切关系，本文从震后火灾的机理出发，提出了用事件树模型预测供气、供电系统引发震后火灾的方法．
Fire after the earthquake is a common phenomenon of several large earthquakes abroad. Through comparative analysis of several post-earthquake fires abroad, this article summarizes the main factors that lead to post-earthquake fires and the characteristics of post-quake fires. After the earthquake, the fire has a close relationship with the destruction of the lifeline system. Based on the fire mechanism after the earthquake, this paper presents a method of predicting the supply of gas by the event tree model and the power supply system causing the post-earthquake fire.