主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2024, Vol. 43 ›› Issue (2): 177-182.

• • 上一篇    下一篇

正交胶合木楼板全尺寸耐火性能试验研究

彭磊1, 邱培芳2,3,4, 欧加加5   

  1. （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）
  • 出版日期:2024-02-15 发布日期:2024-02-15
  • 作者简介:彭 磊（1980- ），男，天津泰达消防科技有限公司，博士，主要从事装配式钢结构及木结构建筑防火、建筑幕墙防火和特殊消防设计等方面的研究，天津市和平区五大道街常德道75号1门401号，300381。
  • 基金资助:
    国家重点研发计划项目（2018YFC0807600）

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

Peng Lei1, Qiu Peifang2,3,4, Ou Jiajia5   

  1. (1. Tianjin Taida Fire Technology Co., Ltd., Tianjin 300381, China; 2. Tianjin Fire Science and Technology Research Institute of MEM, Tianjin 300381, China; 3. Laboratory of Fire Protection Technology for Industry and Public Building, Ministry of Emergency Management, Tianjin 300381, China; 4. Tianjin Key Laboratory of Fire Safety Technology, Tianjin 300381, China;5. China Southwest Architectural Design and Research Institute Co. Ltd., Sichuan Chengdu 610042, China)
  • Online:2024-02-15 Published:2024-02-15

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。

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

Abstract: Experimental tests were carried out to study the fire?resistance 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 protected 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?layers 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, respectively. 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.

Key words: cross?laminated timber floor, full?scale test, load?bearing, fire?resistance performance, charring rate