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使用火灾模拟软件FDS 4.0,对某动车检修大库在虚拟火灾场景下的瞬态烟气扩散分布、火源处瞬态温度分布以及防火隔墙对火源热辐射强度影响3个特征参数进行了仿真分析,并对该建筑的消防设计进行了安全性能评估。模拟结果表明,对于假设的火灾工况(即火源热辐射强度为36 MW时),火源附近的烟气能有效通过侧窗排出,从而无热障效应产生。同时,防火隔墙的设计能在一定时间内有效防止火灾由火源处向检修库房的其它区域蔓延。
Using the fire simulation software FDS 4.0, three characteristic parameters of instantaneous fume distribution, instantaneous temperature distribution of fire source and influence of fire wall on the heat radiation intensity of fire source under a virtual fire scene were investigated using FDS 4.0 Simulation analysis, and the fire safety design of the building was evaluated. The simulation results show that for the assumed fire conditions (ie, when the heat radiation intensity of the fire source is 36 MW), the flue gas near the fire source can be effectively discharged through the side windows, so that no thermal barrier effect is generated. At the same time, the design of the fire wall can effectively prevent the fire from spreading to other areas of the warehouse during a certain period of time.