ETFE膜结构顶板和侧墙的火灾燃烧试验研究  

Experimental study on fire combustion of ETFE membrane side wall and ceiling

作　　者：杜鹏 袁沙沙[1] 刘祉伊 李晶霞 晏风 顾广悦 周欣鑫 刘静[1] 郑志新 Du Peng;Yuan Shasha;Liu Zhiyi;Li Jingxia;Yan Feng;Gu Guangyue;Zhou Xinxin;Liu Jing;ZhengZhixin(China Academy of Building Research Fire Institute,Beijing 100013,China;China People’s Police University,Langfang 065000,China;Hohhot Construction Engineering Fire Technical Service Center,Hohhot 010010,China)

机构地区：[1]中国建筑科学研究院建筑防火研究所,北京100013 [2]中国人民警察大学,河北廊坊065000 [3]呼和浩特市建设工程消防技术服务中心,内蒙古自治区呼和浩特010010

出　　处：《建筑科学》2024年第7期103-112,共10页Building Science

基　　金：中国建筑科学研究院青年基金项目(20230111331030038)。

摘　　要：近年来,膜结构被广泛用于建筑结构中,具有造价低、施工周期短、环保性能高等优点,但是建筑结构采用B1材料也存在一定的火灾风险,亟需对膜结构的防火性能进行系统研究。本研究选取乙烯-四氟乙烯共聚物膜(ETFE膜)作为侧墙和顶棚进行研究,通过全尺寸实体燃烧试验研究膜裂解条件,通过相似理论分析预测火灾高度,以分析顶棚和侧墙的烧穿规律。研究结果表明,不同火源功率下建筑结构被烧穿现象主要与火源高度的相关性最大,在火源功率为10.0MW的条件下,火焰高度大约为9.10m;ETFE膜顶棚被烧穿的条件有两个,一是必须与火焰直接接触,二需在200℃左右的火焰接触超过2min;当ETFE膜作为侧面时,设置火源功率2.0MW的火焰,火焰与膜水平距离1m时,膜不会被引燃。研究为B1材料的防火性能提供了理论依据和数据支撑。In recent years,membrane structures have been widely used in building structures,which have the advantages of low cost,short construction period and high environmental performance,but the use of B1 materials in building structures also has a certain fire risk.It is urgent to systematically study the fire performance of membrane structures.In this study,ethylene-tetra fluoro ethylene(ETFE)membrane is selected as the side wall and ceiling for research,the ETFE membrane cracking conditions are studied through full-scale solid combustion test,and the fire height is predicted by similarity theory analysis to analyze the burn-through law of the roof and side wall.The results show that the burn-through phenomenon of building structure under different fire source power is mainly correlated with the ignition height,and the flame height is about 9.10 m under the condition of 10.0 MW of ignition source.There are two conditions for ETFE membrane ceiling to be burned through,one is that it must be in direct contact with the flame,and the other is that the flame contact at about 200℃is more than 2 minutes.When the ETFE membrane is used as the side,a flame with a fire source power of 2.0 MW is set,and the membrane will not be ignited when the horizontal distance between the flame and the membrane is 1 m.The study provides a theoretical basis and data support for the fire performance of B1 materials.

关 键 词：乙烯-四氟乙烯共聚物膜 顶棚侧墙 消防安全 实体燃烧火灾 

分 类 号：TU998.1[建筑科学—市政工程]