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最高温度是火灾场景设计中的一个关键参数,它决定了火灾中衬砌结构材料力学性能的劣化程度。本文通过对国内外大量隧道火灾案例的分析和研究,给出了公路隧道中不同车辆在火灾中可能达到的最高温度。同时通过对火灾试验成果的分析,得出了通风对隧道内达到的最高温度及峰值热释放率具有明显的影响,且其影响效果与火灾类型有关。最后通过对火灾试验成果的统计分析,给出了不同火灾类型下通风风速与最高温度的经验公式。
The maximum temperature is a key parameter in the fire scene design, which determines the degree of deterioration of the mechanical properties of the lining structural material in a fire. In this paper, a large number of tunnel fire cases at home and abroad were analyzed and studied, and the maximum temperatures that different vehicles in the tunnel could reach during the fire were given. At the same time, through the analysis of fire test results, it is concluded that ventilation has a significant effect on the maximum temperature and peak heat release rate reached in the tunnel, and the effect is related to the type of fire. Finally, through the statistical analysis of fire test results, the empirical formulas of ventilation wind speed and maximum temperature under different fire types are given.