阻燃涂料处理三面受火锯材木梁耐火极限的试验研究

引用文献:

陈玲珠 韩重庆 许清风 王正昌 冷予冰 陈溪. 阻燃涂料处理三面受火锯材木梁耐火极限的试验研究[J]. 建筑结构,2022,48(03):130-133,109.

CHEN Lingzhu HAN Chongqing XU Qingfeng WANG Zhengchang LENG Yubing CHEN Xi. Experimental study on fire endurance of sawn timber beams treated with fire retardant coating exposed to three-side fire[J]. Building Structure,2022,48(03):130-133,109.

作者:陈玲珠 韩重庆 许清风 王正昌 冷予冰 陈溪
单位:上海市建筑科学研究院有限公司上海市工程结构安全重点实验室 东南大学建筑设计研究院有限公司 无锡龙湖置业有限公司
摘要:中国传统建筑多为木结构,而木结构火灾隐患较大,因此对传统木结构的耐火性能提升技术研究迫在眉睫。为此,选取市场上常见的适用于古建筑木结构的透明水性阻燃涂料,通过6根锯材木梁三面受火耐火极限的对比试验,研究阻燃涂料对不同截面尺寸锯材木梁耐火性能的提升效果。研究结果表明,锯材木梁截面尺寸由100mm×200mm增大至200mm×400mm时,耐火极限提高95.1%~107.8%,平均提高102.0%;经阻燃涂料处理后,锯材木梁的耐火极限提高约10min;随着受火时间延长,越靠近试件边缘部位的温度升高越快;阻燃涂料处理试件内部温度升高速度明显小于对应未作处理的试件。
关键词:阻燃涂料,锯材木梁,耐火极限,传统木结构,炭化速度
作者简介:陈玲珠,博士,高级工程师,主要从事工程结构抗火研究,Email:20040392chen@163.com。许清风,博士,教授级高级工程师,主要从事木竹结构和工程结构抗火研究,Email:xuqingfeng73@163.com。
基金:国家自然科学基金(51808339、51978402);上海市青年科技启明星计划项目(17QB1403400)。
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Experimental study on fire endurance of sawn timber beams treated with fire retardant coating exposed to three-side fire
CHEN Lingzhu HAN Chongqing XU Qingfeng WANG Zhengchang LENG Yubing CHEN Xi
(Shanghai Key Laboratory of Engineering Structure Safety, SRIBS Co., Ltd. Architects & Engineers Co., Ltd.of Southeast University Wuxi Longfor Real Estate Co., Ltd.)
Abstract: Most of traditional buildings in China are made of timber structures, which exhibit large fire risk. So it is urgent to study the fire performance improvement technology of traditional timber structures. For this reason, a transparent water-borne fire-retardant coating commonly seen in the market and suitable for ancient building timber structures was selected. Its improvement of fire retardant coating on the fire performance of sawn timber beams with different cross-section sizes was studied through the comparative tests on fire endurance of 6 sawn timber beams exposed to three-side fire. The results show that when the cross-section size of sawn timber beam increases from 100 mm×200 mm to 200 mm×400 mm, their fire resistance increases by 95.1%~ 107.8%, with an average increase of 102.0%; after being treated with fire retardant coating, the fire resistance of sawn timber beam increases by about 10 min; with the extension of fire duration, the temperature near the edge of the specimen increases faster; the internal temperature of the specimen treated with fire retardant coating increases slower than that of the untreated specimens.
Keywords: fire retardant coating; sawn timber beam; fire endurance; traditional timber structures; charring rate
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