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（1 浙江大學(xué)城市學(xué)院，杭州 310015； 2 上海理工大學(xué)，上海 200093）
［摘要］針對(duì)已卸載的開(kāi)裂鋼筋混凝土梁開(kāi)展碳纖維布（CFS）的加固性能研究，共進(jìn)行了10根混凝土梁的試驗(yàn)，其中2根對(duì)比梁，8根CFS加固梁。采用USAP程序建立有限元分析模型，研究了 U形CFS箍用量和曾加荷載對(duì)加固效果的影響，并與試驗(yàn)結(jié)果作對(duì)比。研究表明，當(dāng)曾加荷載超過(guò)一定值后，承載力不再提高，加固無(wú)效。
［關(guān)鍵詞］開(kāi)裂混凝土梁；加固；碳纖維布；試驗(yàn)；抗剪性能
Study on shear behavior of pre-cracked RC beams strengthened with externally bonded CFS
Liao Juan1, Wang Xin2（1 Zhejiang University City College, Hangzhou 310015, China; 2 University of Shanghai for Science and Technology, Shanghai 200093, China）
Abstract:The shear behavior of pre-cracked RC beams strengthened with externally bonded CFS, of which loads have been removed before strengthening, was studied. A series of 10 RC beams, including 2 contrast beams and 8 beams reinforced with CFS, were tested to find out the effect of CFS levels and preload. The finite element model was established using USAP software and the analysis results were compared with the experiment ones. The study indicates that when the preload exceeds the upper limit, the bearing capacity can′t be increased any more, and the strengthening is of no use.
Keywords:pre-cracked RC beams; reinforcement; CFS; experiment; shear behavior
作者簡(jiǎn)介：廖娟，博士，副教授，Email：liaoj@zucc.edu.cn。
參考文獻(xiàn)
［1］廖娟,金堅(jiān),徐興.CFS加固開(kāi)裂混凝土受彎構(gòu)件的抗彎性能研究［J］. 建筑結(jié)構(gòu)，2009, 39(11):97-100.
［2］CECS146：2003碳纖維片材加固混凝土結(jié)構(gòu)技術(shù)規(guī)程［S］.北京：中國(guó)計(jì)劃出版社，2003.
［3］徐興, 凌道盛.實(shí)體退化單元系列［J］. 固體力學(xué)學(xué)報(bào)：計(jì)算力學(xué)專輯，2001(22):1-12.
［4］陳惠發(fā)，薩里普 A F. 混凝土和土的本構(gòu)方程［M］.余天慶，王勛文，劉西拉，等，譯. 北京：中國(guó)建筑工業(yè)出版社，2004.