性能化机械排烟设计方法在剧场观众厅中的应用

Performance-based design of mechanical exhaust in theater auditorium

剧场观众厅一般为高大空间,且不划分防火分区,参照规范设计的机械排烟量较大。采用性能化分析方法来开展某剧场观众厅的排烟设计,先通过美国NFPA92B中的产烟率计算公式确定机械排烟量,再利用典型场景下的烟气模拟和人员疏散模拟验证所设计排烟量的安全性。结果表明,采用性能化机械排烟设计方法能大大降低剧场观众厅的机械排烟量。

Theater auditorium is generally tall and large space, and does not diVide the fire compartment, the mechanical exhaust smoke volume designed according to the codes will be too large. Designs the smoke exhaust system of a theater auditorium with the performance-based analysis method, calculates the mechanical exhaust smoke volume by formula of smoke production rate in the U. S. NFPA92B firstly, and then verifies the security of the mechanical exhaust smoke volume with the smoke and personnel evacuation simulation under typical scenario. The result shows that the performance-based mechanical exhaust design method can greatly reduce the mechanical exhaust smoke volume of the theater auditorium.