- 摘 要
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(1 上海市建筑科學(xué)研究院有限公司 上海市工程結(jié)構(gòu)安全重點實驗室, 上海 200032;2 東南大學(xué)建筑設(shè)計研究院有限公司, 南京 210096;3 無錫龍湖置業(yè)有限公司, 無錫 214135)
摘要: 中國傳統(tǒng)建筑多為木結(jié)構(gòu),而木結(jié)構(gòu)火災(zāi)隱患較大,因此對傳統(tǒng)木結(jié)構(gòu)的耐火性能提升技術(shù)研究迫在眉睫. 為此,選取市場上常見的適用于古建筑木結(jié)構(gòu)的透明水性阻燃涂料,通過 6 根鋸材木梁三面受火耐火極限的對比試驗,研究阻燃涂料對不同截面尺寸鋸材木梁耐火性能的提升效果. 研究結(jié)果表明,鋸材木梁截面尺寸由100mm×200mm 增大至 200mm×400mm 時,耐火極限提高 95. 1% ~ 107. 8%,平均提高 102. 0%;經(jīng)阻燃涂料處理后,鋸材木梁的耐火極限提高約 10min;隨著受火時間延長,越靠近試件邊緣部位的溫度升高越快;阻燃涂料處理試件內(nèi)部溫度升高速度明顯小于對應(yīng)未作處理的試件.
關(guān)鍵詞: 阻燃涂料; 鋸材木梁; 耐火極限; 傳統(tǒng)木結(jié)構(gòu); 炭化速度
中圖分類號: TU372. 5,TU366 文獻標志碼: A 文章編號:1002-848X(2022)03-0130-04
DOI:10. 19701 / j. jzjg. LS190207
Experimental study on fire endurance of sawn timber beams treated with fire retardant coating exposed to three-side fire
CHEN Lingzhu1, HAN Chongqing2, XU Qingfeng1, WANG Zhengchang3, LENG Yubing1, CHEN Xi1
(1 Shanghai Key Laboratory of Engineering Structure Safety, SRIBS Co., Ltd., Shanghai 200032, China;2 Architects & Engineers Co., Ltd. of Southeast University, Nanjing 210096, China;3 Wuxi Longfor Real Estate Co., Ltd., Wuxi 214135, China)
Abstract: Most of traditional buildings in China are made of timber structures, which exhibit large fire risk. So it is urgentto study the fire performance improvement technology of traditional timber structures. For this reason, a transparentwater-borne fire-retardant coating commonly seen in the market and suitable for ancient building timber structures wasselected. Its improvement of fire retardant coating on the fire performance of sawn timber beams with different cross-sectionsizes was studied through the comparative tests on fire endurance of 6 sawn timber beams exposed to three-side fire. Theresults show that when the cross-section size of sawn timber beam increases from 100mm×200mm to 200mm×400mm, theirfire resistance increases by 95. 1% ~ 107. 8%, with an average increase of 102. 0%; after being treated with fire retardantcoating, the fire resistance of sawn timber beam increases by about 10 min; with the extension of fire duration, thetemperature near the edge of the specimen increases faster; the internal temperature of the specimen treated with fireretardant coating increases slower than that of the untreated specimens.
Keywords:fire retardant coating; sawn timber beam; fire endurance; traditional timber structures; charring rate
∗國家自然科學(xué)基金(51808339、51978402) ,上海市青年科技啟明星計劃項目(17QB1403400) .
第一作者:陳玲珠,博士,高級工程師,主要從事工程結(jié)構(gòu)抗火研究,Email: 20040392chen@ 163. com.
[引用本文] 陳玲珠,韓重慶,許清風(fēng),等. 阻燃涂料處理三面受火鋸材木梁耐火極限的試驗研究[ J] . 建筑結(jié)構(gòu),2022,52(3) :130-133,109. CHEN Lingzhu, HAN Chongqing, XU Qingfeng, et al. Experimental study on fire enduranceof sawn timber beams treated with fire retardant coating exposed to three-side fire[ J] . Building Structure,2022,52( 3) :130-133,109.
