论性能化防火分析中的典型火灾场景方法

On the Approach of Typical Fire Scenario for Performance-Based Fire Protection Analysis

火灾场景的设计是性能化防火分析的基础环节。针对可燃物众多、分布不均匀且摆放形式常有变动的大空间建筑,可以使用典型火灾场景的设计方法。在总体阐述的基础上,结合某购物广场火灾场景设定的算例对该方法的原则和步骤进行分析。可以看出,根据火灾荷载的计算和火灾蔓延可能性的讨论,得到火灾发展的变化情况和热释放速率曲线,能够为之后的工作做好前期准备,同时显著提高这项工作的效率。

It is fundamental for performance-based fire protection analysis to design fire scenario. The approach of typical fire scenario can be used for the large space building, in which there are large numbers of combustibles which are distributed unevenly and changed frequently. Based on the general expatiation, the principle and process of this approach were discussed, combined with an example for designing fire scenario of a certain shopping mall. It can be seen that fire growth and heat release rate curve can be obtained through the calculation of fire load and the estimation of fire spread, which can provide the input for the latter work and enhance the efficiency of fire protection analysis observably.