建筑双层玻璃幕墙火灾行为特性研究  

Study on fire behavior characteristics of double glass curtain wall in building

作　　者：陆新晓 张明媚 董超 乔雨[4] 刘家佑 LU Xin-xiao;ZHANG Ming-mei;DONG Chao;QIAO Yu;LIU Jia-you(School of Resource and Safety Engineering,China Univer.sity of Mining and Technology(Beijing),Beijing 100083,China;State Key Laboratory of Fire Science,University of Science and Technology of China,Anhui Hefei 230026,China;Inner Mongo.lia Hohhot Pumped Storage Power Generation Co.Ltd.,Inner Mongolia Hohhot 010051,China;China Academy of Space Technology,Beijing 100094,China)

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]中国科学技术大学火灾科学国家重点实验室,安徽合肥230026 [3]内蒙古呼和浩特抽水蓄能发电有限责任公司,内蒙古呼和浩特010051 [4]中国空间技术研究院,北京100094

出　　处：《消防科学与技术》2018年第8期1087-1090,共4页Fire Science and Technology

基　　金：国家自然科学基金青年基金项目(51704299);北京市优秀人才培养项目(2017000020124G011);火灾科学国家重点实验室开放课题(HZ2018-KF08);中央高校基本科研业务费专项资助项目(2017QZ01);中国矿业大学(北京)课程建设与教学改革项目(J180102)

摘　　要：为研究建筑双层玻璃幕墙的火灾行为特性,通过PyroSim建立双层玻璃幕墙几何模型,利用FDS模拟火灾发展及蔓延,分析火灾过程中的温度、烟气和房间CO体积分数变化规律。模型设定不开启自动喷淋系统和机械排烟系统。设门洞开在1层内侧幕墙和门洞开在1~6层内侧幕墙,幕墙之间距离为0.5、0.9、1.3 m。结果表明:高温气流可沿烧穿的玻璃幕墙快速蔓延,在每层幕墙破裂处呈现明显的回旋状高温气流,双层幕墙间的烟气扩散速度为4.5 m/s,房间内能见度随时间降低,非起火房间会出现一段时间内能见度下降又升高的现象,80 s时各层房间内能见度均小于5 m,起火房间内CO体积分数随时间呈近似线性增大,增大幕墙间距对控制非起火房间CO体积分数有积极作用,但也存在将起火房间的火焰引至幕墙间的危险。The variation rules of temperature,smoke and room vol-ume fraction of CO in fire were analyzed to study the fire behavior characteristics of double glass curtain wall in building by using Py-roSim to build geometric models of double glass curtain wall and using FDS to simulate fire development and spread.The automatic sprinkler system and mechanical smoke exhaust system were dis-able in model setting.The door opened on the inner curtain wall of the first floor and all six floors and the distances between curtain walls were 0.5,0.9 and 1.3 m.The results showed that high tem-perature airflow could spread rapidly along the burning glass cur-tain wall and there was an obvious swirl of high temperature air-flow in the crack of each curtain wall.The smoke spread speed be-tween double curtain walls was 4.5 m/s.The visibility in the room decreased with time,while a period of reduced visibility and in-creased visibility occurred in the non-fire rooms and the visibilities in every room were all less than 5 m in 80 s.The volume fraction of CO in fire room approximately linear increased over time.Increas-ing curtain wall distance had a positive effect on controlling CO volume fraction in non-fire rooms,but there was also a danger of inducing the flame in the fire room to the curtain wall.

关 键 词：玻璃幕墙 火灾 FDS 温度 烟气 CO体积分数 

分 类 号：X913.4[环境科学与工程—安全科学] TU834[建筑科学—供热、供燃气、通风及空调工程]