摘要
通过对某站前广场地下"集散空间"建筑特点及防火分区特点的分析,结合国内《建筑设计防火规范》、《汽车库、修车库、停车场设计防火规范》及美国NFPA92B关于排烟条件及排烟量的设置,利用FDS数值模拟结果验证每个防火分区的排烟方式及排烟量,结果表明:防火分区一、二、三、六满足自然排烟的要求,采用自然排烟;鉴于本建筑特有的结构特点,排烟支管上翻的排烟效果优于支管平接;亚安全区域一的防烟分区Y1-3自然排烟时,烟气维持在2m以上,此区域可以采用自然排烟;亚安全区域二按美国NFPA92B计算的排烟量(196530m^3/h)排烟时,能使烟气层维持在2m以上,满足人员疏散要求。
The architectural traits and the fire compartment characteristics of the underground ＂distributing space＂ of a railway station square were analyzed. The smoke exhaust method and volume of each fire compartment were verified using FDS numerical simulation results, combining with the terms of smoke exhaust conditions and volume in the domestic ＂Code of Design on Building Fire protection and prevention＂, ＂Code for fire protection design of garage, motor-repair-shop and parking-area＂ and the NFPA92 B. Results show that natural smoke exhaust method is used in the fire compartment I, II, III and VI as the requirements of natural smoke extraction can be met in these zones. The smoke exhaust effect of the upturning branch ducts is better than flat joint for the specific structure characteristics of this construction. The smoke can be hold above 2m in the fire compartment Y1-3 of sub-safety area I using natural smoke exhaust. In sub-safety area II, the smoke layer height can be kept above 2m when the smoke exhaust volume is calculated according to NFPA92B（393060m-3/h）, and the requirement of personnel evacuation can be satisfied.
出处
《制冷与空调（四川）》
2015年第6期654-661,共8页
Refrigeration and Air Conditioning
关键词
集散空间
自然排烟
性能化设计
FDS
Distributing space
Natural smoke extraction
Performance-based design
FDS
