探讨凹型建筑外立面火灾竖向蔓延

Vertical spread of facade fire on concave building

选取10起典型外立面火灾案例进行分析,结合FDS软件进行建模,模拟凹型平面建筑外立面火灾,分析火场温度、烟气蔓延、CO浓度,模拟结果与矩形平面模型(标准模型)、不同进深的凹型模型、不同面宽的凹型模型模拟结果进行对比,研究凹型平面建筑外立面火灾竖向蔓延的特点。凹型平面建筑进深的增加对烟气蔓延、火场温度并没有本质影响;面宽的增加使火场温度降低,烟气蔓延减缓。

Combined with model establishment by FI）S, ten cases of typical facade fire were selected to analyze the facade fire of the concave plane building. By measuring the value of fire tempera ture, smoke spread and concentration of CO, and comparing with the models of rectangular plane, concave model with different depths and concave model with different widths,the vertical fire spread of concave plane building was analyzed.Tbe increase of depth of concave has no essential effect on the smoke spread and the temperature of fire, but the increase of width can reduce tbe temperature of fire and the spread of smoke.