利用Pyro-Sim软件建立多楼梯办公大楼3D模型,设置4个着火点,从温度、能见度、CO体积分数方面分析烟气在走廊和楼梯间的蔓延过程,得到不同工况、不同位置的危险临界时间.将模拟所得数据绘制成曲线图,结合Pathfinder软件进行人员疏散的研究.结果表明:对于楼梯为主要疏散通道的建筑,烟气先向通风口的方向蔓延,在楼梯间上下流动过程中向两边走廊扩散;能见度对人员疏散的影响大于温度和CO体积分数.%Pyro-Sim software was used to set up the stairs office building 3D model and 4 fire points were put up.From three aspects of temperature,visibility and CO volume fraction,the smoke spread process in corridors and stair cases were analyzed to get the critical time of danger on different location in different scenarios.Curves of the simulation data was made to study the evacuation based on Pathfinder software.Results showed that for the stair cases as the main channel for evacuation of buildings,smoke spread to the direction of the vent at first,then spread to the stairs,finally spread to both sides of the corridor.The visibility has more influence on the evacuation than temperature and CO volume fraction.
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