基于火灾安全的挡烟垂壁设计探讨

Study on smoke barriers design based on fire safety analysis

以某商业建筑为分析对象,运用场模型的仿真计算方法和火灾安全性分析原理,就挡烟垂壁高度的增加对人员可用安全疏散时间的延长作用及效果进行定量分析。基于最不利原则,将火灾设定在楼梯间附近,最大热释放速率3 MW;挡烟垂壁高度设置为600、800、1 000 mm。分析结果表明,挡烟垂壁的高度每增加200 mm,可用安全疏散时间延长约400 s,烟气控制改善效果明显。

Taking a commercial building as example,prolonging the Available Safe Egress Time(ASET)by increasing the height of smoke barriers was studied by the method of field model simulation and the principle of fire safety analysis.The fire whose max heat release is 3 MW was set nearby the staircase by most unfavorable principles.The heights of smoke barriers were set as 600,800 and 1 000 mm.The results of case study showed that the improvement of smoke control is obvious and more than 400 s of ASET is prolonged with each increase of 200 mm height of smoke barriers.