办公建筑室内全尺寸轰燃实验温度和能见度  

Office building indoor full-scale experimental studies on the flashover temperature and visibility

作　　者：李利敏[1,2,3] 朱国庆[1,2,3] 

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]中国石广业大学消防研究所,江苏徐州221116 [3]中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116

出　　处：《消防科学与技术》2014年第5期517-520,共4页Fire Science and Technology

基　　金：住房和城乡建设部科学技术项目(2011-K3-9)

摘　　要：为研究办公建筑内轰燃发生前后温度和能见度的变化对人员疏散的影响,在办公建筑内进行了全尺寸实体实验。结果表明:办公建筑封闭室内轰燃发生在着火后9min,轰燃后极短的时间内房间的温度急剧上升到1 155℃,轰燃发生后300s,走廊温度从50℃上升到700℃以上;走廊和室内烟气层温度增长速率的最大值分别为25.63、20.21℃/s。室内烟气在着火后55s已达到人员疏散的临界值,并在着火后70s时充满整个房间;走道内烟气在500s时充满整个走道,能见度急剧降低,影响人员安全疏散。In order to study the influence of temperature and visibility changes before and after flashover in the office building on evacuation, full-scale experiments were performed in office buildings. The experimental results show that： Interior flashover occurred in 9 minutes after ignition in office building, within a very short time after flashover the temperature of the room rose sharply to 1 155 ℃, after the flashover occurs 300 s, the corridor temperature rise from 50 ℃ to 700 ℃ ; Corridors and indoor smoke layer temperature maximum growth rates were 25. 63 ℃/s and 20. 21 ℃/s. After the fire the indoor smoke has reached the critical value of evacuation in 55 s, and fills the room at 70 s after ignition; the entire hallway hlled with smoke at 500 s, the visibility is sharply reduced, affect the evacuation.

关 键 词：办公建筑 轰燃 温度 能见度 疏散 

分 类 号：X913.4[环境科学与工程—安全科学] TU243.2[建筑科学—建筑设计及理论]