空腔部分填充的轻钢复合墙体耐火性能研究  

Fire Performance of Cavity-Insulated Cold-Formed Steel Walls

作　　者：金仁超 高亮 刘康 陈伟 JIN Renchao;GAO Liang;LIU Kang;CHEN Wei(Jiangsu Union Technical Institute Nanjing Branch,Nanjing 210019,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]江苏联合职业技术学院南京分院,南京210019 [2]中国矿业大学力学与土木工程学院,江苏徐州221116

出　　处：《建筑钢结构进展》2024年第5期50-56,共7页Progress in Steel Building Structures

基　　金：国家自然科学基金(52278228)。

摘　　要：为提升内填充轻钢复合墙体的抗火性能,开展了2块双层石膏板覆面岩棉内填充非承重轻钢复合墙体的抗火试验研究,探究了不同填充层布置对墙体抗火性能的影响。试验结果表明:相较于空腔全填充墙体,龙骨无填充墙体受火过程中热翼缘温升更慢、冷热翼缘温差更小;龙骨无填充墙体的承重抗火性能优于空腔全填充墙体的承重抗火性能。同时,在荷载比为0.27的条件下,相较于空腔全填充墙体,龙骨无填充墙体的耐火极限提升了11.5%左右,且龙骨无填充墙体的施工更为简便。因此,可考虑采用墙柱无填充的构造形式来代替内填充构造以提升该类墙体承重抗火性能。此外,所建立的轻钢复合墙体受火传热模拟方法适用于龙骨无填充、空腔全填充等不同构造形式的墙体,可为后续轻钢墙体抗火研究提供参考。In order to improve the fire performance of cavity-insulated cold-formed steel(CFS)walls,this study conducted two fire tests of non-load-bearing double-layer gypsum-sheathed and cavity-insulated gypsum CFS walls,and investigated the impact of different cavity-insulated configuration on the fire performance of CFS walls.The results show that compared with cavity-insulated CFS walls,walls without insulation in the stud cavity have slower temperature rise at the hot flange and smaller temperature difference between the hot flange and cold flange during the fire exposure.The fire performance of load-bearing CFS walls without insulation in the stud cavity is better than that of cavity-insulated CFS walls.Meanwhile,at a load ratio of 0.27,the fire resistance of CFS walls without insulation in the stud cavity is about 11.5%higher than that of the cavity-insulated CFS walls,and the construction of walls without insulation in the stud cavity is simpler than that of the cavity-insulated CFS walls.Therefore,it can be considered to use load-bearing CFS walls without insulation in the stud cavity to improve the fire performance of CFS walls.In addition,the established simulation method for heat transfer in CFS walls is applicable to different construction types of CFS walls,such as walls without insulation in the stud cavity and cavity-insulated walls,which can provide technical support for future research on fire performance of CFS walls.

关 键 词：耐火试验 轻钢墙体 抗火性能 数值模拟 填充层构造 

分 类 号：TU392.1[建筑科学—结构工程]