某商业综合体室内步行街消防设计数值模拟

以某商业综合体为例,使用FDS进行三维数值模拟,研究商业综合体内部发生火灾时烟气运动规律。模拟中庭发生火灾的两个火灾场景,考察首层步行街作为人员疏散准安全区的可行性。结果表明:步行街满足准安全区的要求;人员可用安全疏散时间主要受能见度影响;火灾不会通过热辐射的方式蔓延;机械排烟失效造成的危害比自动灭火失效严重。建议加强管理,室内步行街回廊设置排烟系统。

Numerical simulation of fire protection design of a commercial complex

FDS was used to simulate the smoke movement of fire with the example of a commercial complex.Two scenarios were simulated with fire at atrium to evaluate the feasibility of walking street at first floor as quasi-safety zone.The result showed that: the walking street can fit the requirement of quasi-safety zone;the ASET affected mainly by visibility;the fire can not spread by heat radiation;the failure of mechanical exhaust system make more damage than the failure of auto-sprinkler system.Suggestions like enhance the management and set exhaust system at corridor of walking street were put forward.