帶填充墻歷史建筑鋼框架抗震性能有限元分析*
王寶通，張偉平，顧祥林，王璐
- 摘 要
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（同濟(jì)大學(xué)建筑工程系， 上海 200092）［摘要］帶填充墻歷史建筑鋼框架的低周反復(fù)加載試驗(yàn)表明，鋼柱外包磚、填充墻能顯著提高框架抗震承載能力和抗側(cè)剛度。在此基礎(chǔ)上，采用ABAQUS軟件建立單層單跨帶填充墻鋼框架三維實(shí)體模型，進(jìn)一步分析其在水平荷載作用下的受力性能，數(shù)值模擬結(jié)果與試驗(yàn)結(jié)果較吻合。有限元分析發(fā)現(xiàn)，鋼框架達(dá)到承載能力極限狀態(tài)時(shí)鋼柱及其外包砌體、填充墻的貢獻(xiàn)近似等于各自的極限承載能力。參數(shù)分析結(jié)果表明，填充墻寬度增大，墻體承載力貢獻(xiàn)提高，但其抗剪強(qiáng)度下降，不能簡(jiǎn)單地根據(jù)抗剪面積計(jì)算填充墻承載力貢獻(xiàn)。此外，隨著填充墻厚度的增加和砂漿強(qiáng)度的提高，填充墻的承載力貢獻(xiàn)增加。將該類歷史建筑中填充墻框架看作帶斜撐鋼框架，假定鋼柱與外包砌體協(xié)同工作，建立了抗剪承載力的簡(jiǎn)化計(jì)算公式。［關(guān)鍵詞］歷史建筑; 鋼框架; 填充墻; 抗震性能; 有限元分析中圖分類號(hào)：TU391 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2015)10-0026-06Finite element analysis of seismic performance of masonry-infilled historic steel framesWang Baotong, Zhang Weiping, Gu Xianglin, Wang Lu(Department of Structural Engineering, Tongji University, Shanghai 200092, China)Abstract:Low-cyclic lateral loading tests on masonry-infilled historic steel frames show that covered masonry around the columns and the infilled wall can significantly increase the loading capacity and lateral stiffness of the steel frames. For further investigation on structural performance of infilled steel frames under lateral loading, the three-dimensional models of single-layer and single-span steel frame structures with infilled masonry walls were established in ABAQUS for finite element analysis. Numerical simulation results agree well with the experimental results. Results of the finite element analysis indicate that the contribution of infilled wall, steel columns and their covered masonry can approximately equal their respective ultimate lateral loading capacity when the infilled steel frame reaches the ultimate loading capacity. Parametric analysis results show that a greater ultimate loading capacity is found as expected in the steel frame with a wider infilled wall, but the average shear strength of the infilled wall decreases as the width of the infilled wall increases. It can be deduced that the contribution of the infilled wall to the lateral loading capacity cannot be simply estimated by its shear area. With the increase of thickness and mortar strength of the infilled wall, the contribution of the infilled wall to the lateral loading capacity increases. Assuming that steel columns can work well with covered masonry as integral composite columns, this kind of historic building with infilled wall frame was considered as an equivalent diagonal strut, and a simplified method was proposed to calculate the shear capacity of the structure.Keywords:historic building; steel frame; infilled wall; seismic performance; finite element analysis*上海市科學(xué)技術(shù)委員會(huì)研究課題“優(yōu)秀歷史建筑混凝土結(jié)構(gòu)抗震加固的關(guān)鍵技術(shù)研究”(10dz2212800)。作者簡(jiǎn)介：王寶通，碩士研究生，Email: 1989_baotongwang@#edu.cn。參考文獻(xiàn)［1］上海市優(yōu)秀近代建筑中山東一路18號(hào)房屋質(zhì)量檢測(cè)報(bào)告［R］.上海：同濟(jì)大學(xué)房屋質(zhì)量檢測(cè)站, 2003.［2］崔瑋. 歷史建筑基于性能的抗震評(píng)估［D］. 上海：同濟(jì)大學(xué), 2011.［3］STAFFORD SMITH B. Methods for predicting the lateral stiffness and strength of multi-storey infilled frames［J］. 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