通天房火灾危险性实体火灾试验研究  

Full-scale experimental study of fire hazard of building with staircase leading to the top in the middle

作　　者：袁满 朱梦如 李小强 YUAN Man;ZHU Meng-ru;LI Xiao-qiang(Sichuan Fire Research Institute of MEM, Sichuan Chengdu 610036, China;Zhejiang General Fire Brigade, Zhejiang Hang. zhou 310014, China;Sichuan Fast Fire Safety Performance Evaluation Co., Ltd., Sichuan Chengdu 610036, China)

机构地区：[1]应急管理部四川消防研究所,四川成都610036 [2]浙江省消防总队,浙江杭州310034 [3]四川法斯特消防安全性能评估有限公司,四川成都610036

出　　处：《消防科学与技术》2019年第4期504-508,共5页Fire Science and Technology

基　　金：应急管理部四川消防研究所基本科研业务费专项项目(20178816Z)

摘　　要：通过开展通天房实体火灾试验,利用监控系统记录楼梯间和房间烟气填充过程,利用热电偶测量楼梯间和房间的温度变化,利用压差计测量楼梯间内压力。试验过程中楼梯间除木质扶手外基本无其他可燃物。结果显示,通天房楼梯间内温度随高度呈指数衰减,且下部楼梯间温度随着房间发生轰燃将超过1000℃。二层南侧房门被引燃导致二层南侧房间发生轰燃。通过门缝或隔断缝隙,各个房间均有大量烟气进入。楼梯间内压力峰值超过50Pa,若房间内人员不慎开启房门,很难重新关闭。A full-scale experiment of building with staircase leading to the top in the middle was carried out. Video monitoring system was used to analyze the smoke filling procedure in the staircase and the rooms. Also, thermocouples were adopted to measure the temperature and pressure meter was set in the staircase to measure the pressure. In the experiment, there were almost no other combustibles in the stairwell except wooden handrails.The temperature in the staircase decayed exponentially with height and the temperature in the bottom of the staircase exceeded 1 000 ℃ when flashover occurred. The door of the south room on the second floor was burned through and further flashover happened in this room. Smoke spread from staircase to all the rooms through door slot and partition gap. The peak pressure in the staircase exceeded 50 Pa which may cause some difficulty for the residents to re-close the door in the fire.

关 键 词：通天房 火灾烟气 实体火灾试验 温度变化 轰燃 

分 类 号：X932[环境科学与工程—安全科学] TU241.7[建筑科学—建筑设计及理论]