窗槛墙和防火挑檐阻止火灾竖向蔓延的数值模拟

Numerical simulation on wall pier and overhanging eave in preventing vertical fire spread

为了确定窗槛墙和防火挑檐阻止火灾竖向蔓延的效果,运用火灾动力学模拟软件FDS,选择设定办公室及宾馆客房火灾场景,进行了数值模拟研究。研究结果表明:在一定范围内增加窗槛墙的高度将有利于阻止火灾的竖向蔓延,但超出该范围,可能会造成不利影响;防火挑檐比窗槛墙能更有效地阻止火灾的竖向蔓延,且防火挑檐越宽效果越好。

By numerical simulation method and FDS software, the typical office and hotel fire scenarios were designed and the effects of wall pier and fire resistant overhanging eave in pre- venting vertical fire spread were studied. The simulating results show that, increasing the height of wall pier within a certain range will reduce vertical fire spread. The situation will be re- verse beyond certain range. Fire resistant overhanging eave has a better effect on preventing fire from spreading vertically than wall pier,and wider fire resistant overhanging eave leads to bet- ter fire prevention.