高层建筑火灾时同时开启门数量的确定

Determination of simultaneous opening door quantity for high-rise buildings in case of fire

应用概率理论对高层建筑火灾时防烟楼梯间同时开启门数量的确定进行了分析。结果表明,高层建筑火灾时同时开门楼层数与建筑疏散人数、疏散出口数量、有效疏散时间、建筑物总层数、疏散出口宽度、疏散出口流动系数等因素有关,每个安全出口负担的疏散人员数是影响防烟楼梯间同时开门楼层数的关键因素,当每个安全出口负担的疏散人员数超过75人/层时,为了减少同时开门楼层数,应适当增加安全出口数量。

Analyses the simultancous opening door quantity in smoke-preventing stairwell with probability theory. The result shows that the simultaneous opening door quantity has correlation with evacuation occupant quantity, exit quantity, effective evacuation time, building total story number, exit door width and occupant＇s flow velocity at exit. Occupant quantity at each exit is a key issue, when the occupant quantity in one story exceeds 75, the safe exit quantity should be increased to decrease simultaneous opening door quantity.