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
彭磊 1邱培芳 2张超3
作者信息
- 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;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;天津市消防安全技术重点实验室,天津 300381
- 3. 天津市河西区消防救援支队,天津 300222
- 折叠
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3 600 mm×4 000 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.
Abstract
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 3 600 mm×4 000 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Key words
cross-laminated timber/load-bearing wall/full-scale/fire-resistance performance/charring rate/heat-resistant PUR ad-hesive引用本文复制引用
基金项目
国家重点研发计划(2018YFC0807600)
出版年
2024
NETL
NSTL
维普
万方数据