正交胶合木承重墙体的全尺寸耐火试验研究  

Experimental study on fire⁃resistance performance of full⁃scale load⁃bearing cross⁃laminated timber walls

作　　者：彭磊 邱培芳 张超 Peng Lei;Qiu Peifang;Zhang Chao(Tianjin Taida Fire Technology Co.,Ltd.,Tianjin 300381,China;Tianjin Fire Science and Technology Research Institute of MEM,Tianjin 300381,China;Key Laboratory of Fire Protection Technology for Industry and Public Building,Ministry of Emergency Management,Tianjin 300381,China;Tianjin Key Laboratory of Fire Safety Technology,Tianjin 300381,China;Tianjin Hexi District Fire and Rescue Divi-sion,Tianjin 300222,China)

机构地区：[1]天津泰达消防科技有限公司,天津300381 [2]应急管理部天津消防研究所,天津300381 [3]工业与公共建筑火灾防控技术应急管理部重点实验室,天津300381 [4]天津市消防安全技术重点实验室,天津300381 [5]天津市河西区消防救援支队,天津300222

出　　处：《消防科学与技术》2024年第1期39-44,共6页Fire Science and Technology

基　　金：国家重点研发计划项目(2018YFC0807600)。

摘　　要：为研究正交胶合木墙体在承载条件下的耐火性能,开展了全尺寸构件的耐火试验,构件尺寸(宽×高×厚)为3600 mm×4000 mm×175 mm,宽度方向上施加的荷载为120 kN/m,两面墙体分别采用单层15 mm厚和双层12 mm厚的耐火石膏板进行防火保护。试验结果表明,对于采用15 mm厚耐火石膏板的试件5W-1,石膏板的脱落时间约为55 min,该试件采用耐热型PUR胶压制,层板炭化后未发生明显的脱落;对于采用双层12 mm厚耐火石膏板的试件5W-2,第一层石膏板的脱落时间约为40 min,第二层石膏板的脱落时间约为85 min,该试件采用普通PUR胶压制,第一层层板在停火后发生了较明显的脱落现象。两次试验均进行至121 min,试件的竖向位移分别为-10.3 mm和-9.5 mm,两面墙体的背火面整体完好、表面最高温升不超过5℃。最终试验结果表明,两面承重墙体试件的承载能力、完整性和隔热性均不低于2.00 h。Full⁃scale experimental tests were carried out to study the fire⁃resistance performance of cross⁃laminated timber walls in load⁃bearing conditions.The tested wall specimens had sizes(width×height×thickness)of 3600 mm×4000 mm×175 mm,and subjected to a linear load of 120 kN/m.The two tested walls were protected with one⁃layer of 15 mm⁃thick fire⁃resistant gyp⁃sum board and two⁃layers of 12 mm⁃thick fire⁃resistant gypsum boards,respectively.Test results show that,for the specimen 5W⁃1 protected with one⁃layer of 15 mm⁃thick fire⁃resistant gypsum board,the gypsum board fell off at about 55 min,and no obvious char layer delamination was observed because this specimen was made using the heat⁃resistant PUR adhesive.For the specimen 5W⁃2 protected two⁃layers of 12 mm⁃thick fire⁃resistant gypsum boards,the 1st layer of gypsum board fell off at about 40 min and the 2nd layer fell off at about 85 min,and the char layer delami⁃nated after the furnace burner was terminated,because this speci⁃men was made using the ordinary PUR adhesive.At 121 min,the vertical displacements of the wall specimens were about-10.3 mm and-9.5 mm,respectively.The unexposed sides of the wall specimens showed intact,and the temperature rise on the unex⁃posed sides were less than 5℃for the both specimens.The final results show that the two tested wall specimens have lord⁃bearing capacity,fire integrity and insulation not less than 2.00 h.

关 键 词：正交胶合木 承重墙 全尺寸 耐火性能 炭化速率 耐热型PUR胶 

分 类 号：X932[环境科学与工程—安全科学] TU366.3[建筑科学—结构工程]