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（1 浙江大學(xué)城市學(xué)院，杭州 310015； 2 華匯工程設(shè)計(jì)集團(tuán)有限公司，紹興 312000； 3 浙江大學(xué)，杭州 310027）
［摘要］針對(duì)加固時(shí)已卸載的混凝土受彎構(gòu)件開(kāi)展碳纖維布(CFS)加固性能研究。共進(jìn)行了17根混凝土梁的試驗(yàn)，包括2根對(duì)比梁和15根CFS抗彎加固梁。研究了開(kāi)裂程度、CFS加固層數(shù)對(duì)加固構(gòu)件的破壞形態(tài)、承載力等力學(xué)性能的影響?？偨Y(jié)了CFS加固開(kāi)裂混凝土受彎構(gòu)件時(shí)曾加荷載的上限范圍，給出了CFS加固合理用量的建議。
［關(guān)鍵詞］CFS；卸載；加固；混凝土受彎構(gòu)件；抗剪性能；試驗(yàn)
Study on flexural behavior of pre-cracked RC beams strengthened with externally bonded CFS
Liao Juan1, Jin Jian2, Xu Xing3（1 Zhejiang University City College, Hangzhou 310015, China; 2 Engineering Design Group of Huahui Co., Ltd., Shaoxing 312000, China; 3 Zhejiang University, Hangzhou 310027, China）
Abstract:The flexural behavior of pre-cracked RC beams strengthened with externally bonded CFS, which loads have been removed before strengthening, is studied. The effect of the loads which have been removed and plies of CFS are investigated. A series of 17 RC beams(including 2 contrast beams and 15 retrofitted with CFS) were tested to investigate the effect of preload and number of plies of CFS. The study indicated that the ultimate capacity and the stiffness of strengthened beams are increased compared with contrast beam except that the value of preload is under a certain degree. The upper limit of preload was found out and the number of CFS plies was also suggested.
Keywords:CFS; removed load; strengthening; pre-cracked RC beam; flexural behavior; test of structural member
作者簡(jiǎn)介：廖娟，博士，講師，Email:liaoj@zucc.edu.cn。
參考文獻(xiàn)
［1］GB50367—2006混凝土結(jié)構(gòu)加固設(shè)計(jì)規(guī)范［S］.北京：中國(guó)建筑工業(yè)出版社，2006.
［2］CECS146：2003碳纖維片材加固修復(fù)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］Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures［S］.ACI Committee 440，2002.
［4］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(zhuān)輯），2001，22(專(zhuān)輯):1-12.