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公路隧道火灾疏散场景分析中,火灾热释放率增长模式不同,逃生分析结果也会有所不同。火灾热释放率增长模型通常有4种:线性增长模型、平方增长模型、指数增长(燃料控制)模型和指数增长(通风控制)模型。论文通过对这4种增长模型以及国外大型公路隧道火灾试验进行统计分析,建议在公路隧道火灾疏散场景中采用平方增长的初始阶段火灾模型作为设计火灾模型,并给出了不同设计火灾的热释放率增长曲线。
In the analysis of the scene of the evacuation of highway tunnel fires, the patterns of growth rate of fire heat release rate are different and the result of evacuation analysis will be different. There are usually four models for the increase of heat release rate from fire: linear growth model, square growth model, exponential growth (fuel control) model and exponential growth (ventilation control) model. Through the statistical analysis of the four growth models and the fire tests of large-scale highway tunnels in foreign countries, it is suggested that the squared initial fire model should be adopted as the design fire model in the scene of fire evacuation in highway tunnels, and the heat release of different designed fires Rate growth curve.