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(1 河北工業(yè)大學(xué)土木與交通學(xué)院， 天津 300401；2 天津住宅建設(shè)發(fā)展集團(tuán)有限公司， 天津 300041)
［摘要］提出蒸壓砂加氣保溫板外墻外保溫系統(tǒng)，采用專用連接件和拉筋連接蒸壓砂加氣保溫板和混凝土墻體。為對該系統(tǒng)的受力情況及破壞形式進(jìn)行研究，分別對四片L形截面墻體和兩片T形截面墻體進(jìn)行低周反復(fù)加載試驗(yàn)，并進(jìn)行數(shù)值模擬分析。試驗(yàn)現(xiàn)象表明：保溫板的開裂情況均輕于混凝土墻體本身，而L形截面墻體由于扭轉(zhuǎn)效應(yīng)使得其保溫板的開裂情況較T形截面墻體嚴(yán)重；連接件及拉筋能顯著限制并延緩保溫板與墻體剝離，確?；炷翂w破壞時(shí)，保溫板不脫落。通過試驗(yàn)結(jié)果分析發(fā)現(xiàn)：在混凝土墻體發(fā)生破壞時(shí)，連接件及拉筋應(yīng)力增長明顯，但應(yīng)力數(shù)值小于屈服強(qiáng)度的50%。在與試驗(yàn)近似的加載條件下，系統(tǒng)的數(shù)值模擬分析結(jié)果與試驗(yàn)結(jié)果吻合良好。
［關(guān)鍵詞］蒸壓砂加氣保溫板；外墻外保溫系統(tǒng)；連接件；拉筋；低周反復(fù)加載；數(shù)值模擬分析
中圖分類號(hào)：TU528-72 文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)14-0124-11
Experimental study and finite element model analysis of external thermal insulation system of autoclaved sand aerated insulation board
PENG Jiabin1, WEN Xiaodong1, TIAN Wenling1, ZHAO Xiaohui2
(1 School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin 300401， China；2 Tianjin residential construction development group co., LTD, Tianjin 300041， China)
Abstract: The external thermal insulation system of the autoclaved sand aerated insulation board was proposed, and it adopted special connectors and pulling steel bars to connect the autoclaved sand aerated insulation board and the concrete wall. In order to study the stress situation and failure mode of the system, the reversed cyclic loading was carried out on four L-section and two T-section walls respectively, and then numerical simulation analysis was carried out. The experimental phenomena show that the cracking of the insulation board is lighter than that of the concrete wall itself, while the cracking of the insulation board of the L-section wall is more serious than that of the T-section wall due to the torsion effect. connectors and pulling steel bars can significantly limit and delay the insulation board stripping from the wall, ensuring that the insulation board does not fall off when the concrete wall is damaged. Through the analysis of test results found that when the concrete wall is damaged, the stress of the connectors and pulling steel bars increase obviously, but the stress value is less than 50% of the yield strength. Under the similar loading condition to the test, the numerical simulation results of the system agree well with the test results.
Keywords:autoclaved sand aerated insulation board； external thermal insulation system; connector； pulling steel bar； reversed cyclic loading； numerical simulation analysis
*天津市科技計(jì)劃項(xiàng)目(14ZCZDSF00018)。
作者簡介：彭佳斌，博士研究生，Email: 13752463210@139.com；通信作者：田穩(wěn)苓，教授，博士生導(dǎo)師，Email: wltian126@126.com。
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