%0 Journal Article
%T Simulation study on the effect of pre-evacuation time and exit width on evacuation
%A CHU Guanquan
%A SUN Jinhua
%A WANG Qingsong
%A CHEN Sining
%A <br>CHU
%A Guanquan
%A SUN
%A Jinhua
%A WANG
%A Q
%A ingsong
%A CHEN
%A Sining
%J 科学通报(英文版)
%D 2006
%I 
%X Occupant pre-evacuation time is often oversimplified into an explicit value in evacuation calculation. In fact, it is not an explicit value but a random variable following some kind of probability distribution. In order to analyze the importance of pre-evacuation time in evacuation calculation, Grid- Flow evacuation model is utilized to study the effect of pre-evacuation time on evacuation under different occupant densities and exit widths in a single room scenario. The evacuation time calculated by using normal pre-evacuation distribution is compared with that calculated by explicit pre-evacuation time. Two faults are presented when pre-evacuation time is considered as an explicit value. The theory of con- gestion and queue is presented to analyze the cal- culation results. Moreover, this paper also presents probability distribution of the total evacuation time when the pre-evacuation time follows normal distri- bution. The results show that the evacuation time is dominated by pre-evacuation time and hardly de- pendent on occupant density when the mean pre- evacuation time is long. For long mean pre-evacua- tion time, low occupant density or wide exit, when pre-evacuation time follows normal distribution, the total evacuation time also follows normal distribution.
%K fire
%K pre-evacuation time
%K evacuation
%K normal distribu- tion
%K exit width
%K occupant density<br>火灾
%K 预疏散时间
%K 正态分布
%K 出口宽度
%K 居住密度
%K 模拟研究
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=38CA463E13D4989A550B2F92AABAE970&yid=37904DC365DD7266&vid=987EDA49D8A7A635&iid=708DD6B15D2464E8&sid=196B965FCC00ED31&eid=77586D59F496BF38&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=0&reference_num=16