正交胶合木楼板全尺寸耐火性能试验研究  

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

作　　者：彭磊 邱培芳 欧加加[5] Peng Lei;Qiu Peifang;Ou Jiajia(Tianjin Taida Fire Technology Co.,Ltd.,Tianjin 300381,China;Tianjin Fire Science and Technology Research Institute of MEM,Tianjin 300381,China;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;China Southwest Architectural Design and Research In-stitute Co.Ltd.,Sichuan Chengdu 610042,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]中国建筑西南设计研究院有限公司,四川成都610042

出　　处：《消防科学与技术》2024年第2期177-182,共6页Fire Science and Technology

基　　金：国家重点研发计划项目(2018YFC0807600)。

摘　　要：开展全尺寸正交胶合木楼板在加载情况下的耐火性能试验,所测试的楼板整体厚度为175 mm,在楼板上方均布2.0 kN/m2的砝码进行加载。两块楼板分别采用耐热型聚氨酯(PUR)胶和普通PUR胶制作,并分别采用单层15 mm厚和双层12 mm厚的耐火石膏板进行防火保护。试验发现,对于采用耐热型PUR胶和15 mm厚耐火石膏板的试件,石膏板的脱落时间约为45~50 min,层板炭化后未发生明显的脱落现象;对于采用普通PUR胶和双层12 mm厚耐火石膏板的试件,第一层石膏板的脱落时间约为30 min,第二层石膏板的脱落时间约为60 min,层板炭化后发生了较明显的脱落现象,脱落时间发生在85~100 min。试验进行至121 min,两块楼板中心的竖向位移值分别为-25、-33 mm,楼板背火面整体完好,表面最高温升不超过2℃。结果表明,所测试的楼板试件在加载情况下的耐火极限不低于2.00 h。Experimental tests were carried out to study the fire-re-sistance performance of cross-laminated timber floors with full-scale size in load-bearing conditions.The tested floor specimens were 175 mm in thickness,and loaded with averagely-distributed weight of 2.0 kN/m2.The two tested floors were made using heat-resistant PUR adhesive and ordinary PUR adhesive,and pro-tected with one-layer of 15 mm-thick fire-resistant gypsum board and two-layers of 12 mm-thick fire-resistant gypsum boards.Test results show that,for the floor specimen using heat-resistant PUR adhesive and protected with one-layer of 15 mm-thick fire-resistant gypsum board,the gypsum board fell off at about 45~55 min,and no obvious char layer delamination was observed.For the floor using ordinary PUR adhesive and protected with two-lay-ers of 12 mm-thick fire-resistant gypsum boards,the 1st layer of gypsum board fell off at about 30 min,and the 2nd layer fell off at about 60 min,and the char layer delaminated at about 85~110 minutes.At 121 minutes,the vertical displacements at the center of floor specimens were about-25 mm and-33 mm,respec-tively.The unexposed sides of the floors showed intact,and the temperature rise on the unexposed sides were less than 2℃for the both specimens.The final results show that the fire resistance rating of two tested floors is not less than 2.00 h.

关 键 词：正交胶合木楼板 全尺寸试验 加载 耐火性能 炭化速率 

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]