综合体建筑裙房进深区域火焰蔓延研究

Study on Flame Spread in PodiumDepth Area of Complex Building

目的 研究综合体建筑中的裙房进深区域对综合体建筑火焰蔓延的影响,为该类建筑的防火设计提供参考。方法 应用火灾数值模拟软件PyroSim建立不同裙房进深条件下的综合体建筑模型,分析该模型在竖向不同连续窗口数量下的温度分布等温线。结果 在不同的裙房进深下,达到危险温度540℃和250℃时,火焰融合高度及火焰高度均随着裙房进深的增加明显下降;随着裙房进深依次增大,温度达到540℃时火焰融合高度下降了1.39%~12.85%;温度达到250℃时火焰高度下降了0.03%~13.99%。结论 增加综合体建筑中裙房进深可以明显降低火焰融合高度,降低火灾危险性。

The main objective of this paper is to study the influence of the podium depth on the flame spread of complex buildings in order to provides reference for fire design of this kind of building.The complex building model under different podium depth is established by PyroSim,and the temperature distribution isotherms of the model under different number of vertical continuous windows are analyzed.At different podium depth,when the hazard temperatures reach 540℃and 250℃,the flame fusion height and flame height decrease significantly as the podium depth increasing.The fusion height of the flame decreases by 1.39%~12.85%as the podium depth is increased when the dangerous temperature reaches 540℃.The flame height decreases by 0.03%~13.99%when the dangerous temperature reaches 250℃.The results show that the flame fusion height can be obviously reduced by increasing the podium depth of complex building,and then the fire risk is reduced.