豎向集中荷載作用下聯(lián)合加固混凝土連續(xù)梁試驗(yàn)研究*
鐘春玲1，葉增1,2
- 摘 要
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（1 吉林建筑大學(xué)土木工程學(xué)院，長(zhǎng)春 130118；2 悉地國(guó)際設(shè)計(jì)顧問(wèn)(深圳)有限公司，深圳 518057）［摘要］由于橋梁結(jié)構(gòu)受力情況比較復(fù)雜，單一采用一種加固方式往往不能滿足結(jié)構(gòu)安全的要求。采用體外預(yù)應(yīng)力筋加固受到一定的局限，研究利用碳纖維布與預(yù)應(yīng)力筋聯(lián)合加固混凝土連續(xù)梁結(jié)構(gòu)。加固混凝土連續(xù)梁時(shí)，首先施加體外預(yù)應(yīng)力，然后再粘貼碳纖維布，針對(duì)兩種方法聯(lián)合加固的混凝土連續(xù)梁進(jìn)行試驗(yàn)研究。研究結(jié)果表明，聯(lián)合加固混凝土連續(xù)梁在受力階段表現(xiàn)出更好的變形性能，加固提高了梁的承載能力。［關(guān)鍵詞］聯(lián)合加固; 體外預(yù)應(yīng)力; 碳纖維布; 連續(xù)梁; 靜載試驗(yàn)中圖分類(lèi)號(hào)：TU378.2 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2014)23-0094-03Experimental study on combined reinforcement concrete continuous beam under the vertical concentrated loadZhong Chunling1, Ye Zeng1,2(1 College of Civil Engineering, Jilin Jianzhu University, Changchun 130118, China; 2 CCDI International(Shenzhen)Design Consultants Co., Ltd., Shenzhen 518057, China)Abstract: Considering complicated load conditions of the bridge structure, only one reinforcement method can not meet the safety and the reinforced method of external pre-stressed tendon has limits. Combined reinforcement method of carbon fiber sheet and pre-stressed tendon to reinforce the concrete continuous beam structure was proposed. When reinforcment concrete continuous beam, external pre-stressed force was exerted first, and then carbon fiber sheet was stuck. Experimental study was carried out on the combined reinforcement concrete continuous beam. Result indicates that combined reinforcement continuous beam shows the well ability of deformation at the stress stage and the bearing capacity of the concrete continuous beam improves.Keywords: combined reinforcement; external pre-stress; carbon fiber sheet; continuous beam; static load test*吉林省科技發(fā)展計(jì)劃項(xiàng)目（201105066）。作者簡(jiǎn)介：鐘春玲，博士，教授， Email：zhongchunling11@sina.com。參考文獻(xiàn)［1］高亮.淺議碳纖維加固混凝土梁的試驗(yàn)［J］.科技信息,2011(22): 761-763.［2］譚軍.碳纖維布加固預(yù)應(yīng)力混凝土梁抗彎性能試驗(yàn)與分析［D］.哈爾濱：哈爾濱工業(yè)大學(xué)，2008.［3］SAS G, CAROLIN A. A Model for predicting the shear bearing capacity of FRPstrengthened beams［J］. Mechanics of Composite Materials, 2008，44（3）: 245-256.［4］趙益鵬.CFRP及鋼絞線體外預(yù)應(yīng)力混凝土梁的試驗(yàn)研究［D］.北京：北京交通大學(xué)，2007.［5］張?jiān)讫?體外預(yù)應(yīng)力組合梁受彎全過(guò)程試驗(yàn)分析［J］.工程與試驗(yàn)，2008，48(4): 13-14.［6］楊勇新，李慶偉，岳清瑞.預(yù)應(yīng)力碳纖維布加固混凝土梁預(yù)應(yīng)力損失試驗(yàn)研究［J］.工業(yè)建筑，2006，36(4): 5-18.
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