摘要
为判定人员疏散过程中"准安全区"的安全性,采用基于性能化防火设计的方法对建筑"准安全区"的安全性进行判定。"准安全区"内烟气热辐射、烟气能见度及有毒气体等有害因素的指标必须达到"准安全区"规定的指标要求。发生火灾时,"准安全区"内距离地面2 m以下烟气层温度不应超过60℃,烟气层能见度不应小于10 m,烟气层CO浓度不应大于5×10-4mol/mol。工程应用中可根据"准安全区"各性能判定标准,通过火灾模拟软件模拟分析火灾场景下"准安全区"内各有害因素的性能参数分布,对"准安全区"的安全性进行定性、定量评估。
＂Quasi-security zone＂ judgment method based on the performance-based fire protection design could be taken to ascertain the safety of the ＂Quasi-security zone＂ in the engineering application.The ＂Quasi-security zone＂ is a relatively safe area which should be demonstrated and meet certain performance-based indicators such as heat radiation,smoke toxicity and smoke visibility.Once the fire occurs in the building,the smoke temperature should not exceed 60 ℃,the smoke visibility should not lower 10 m and the concentration of CO should not exceed 5×10-4 mol/mol under 2 m in the ＂Quasi-security zone＂.In practical application,the safety of ＂Quasi-security zone＂ can be qualitatively and quantitatively assessed by comparing the hazardous factors＇ parameters distribution in fire scenarios obtained by simulation analysis software with the judgment criterion of ＂Quasi-security zone＂.
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2011年第4期60-65,共6页
China Safety Science Journal
关键词
建筑
消防
人员疏散
准安全区
性能化防火设计
building
fire
evacuation
quasi-security zone
performance-based fire protection design
