預應力CFRP布加固T形RC梁正截面承載力分析與計算
沙吾列提•拜開依1，葉列平2
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(1 新疆大學建筑工程學院，烏魯木齊 830008； 2 清華大學土木工程系，北京 100084)［摘要］采用碳纖維布施加預應力后加固混凝土梁，可以充分發(fā)揮碳纖維材料的高強度特點，顯著減小梁的裂縫和撓度，提高加固效率。對預應力CFRP布加固鋼筋混凝土T形梁的各種破壞模式、界限和理論計算進行了較系統(tǒng)的分析和總結，并給出了判別破壞模式的方法和計算預應力碳纖維布加固混凝土T形梁正截面的計算公式，計算出的結果與試驗結果較吻合。［關鍵詞］預應力；碳纖維布；加固；T形梁；受彎承載力Analysis and calculating method of flexural capacity of RC T-beams strengthened with prestressed CFRP sheetsSawulet Bekey1, Ye Lieping2（1 College of Architecture Engineering, Xinjiang University, Urumqi 830008, China;2 Department of Civil Engineering, Tsinghua University, Beijing 100084, China)Abstract:The high strength of carbon fiber reinforced polymer(CFRP) can be developed effectively by using CFRP sheets in external bonded strengthening of RC beams. The crack width and the deflection of beams with CFRP sheets can be reduced greatly. Failure type, terminal conditions and theoretical calculation of RC Tbeams strengthened with prestressed CFRP sheets are more systematic analyzed and summarized. Estimation of failure type and flexural strength calculation methods of RC T-beams strengthened with prestressed CFRP sheets are put forward. The obtained results are in good agreement with the experimental results.Keywords:prestressed; CFRP sheet; strengthening；T-beam；flexural strength*新疆大學中青年學術帶頭人及青年學術骨干支持計劃資助。作者簡介：沙吾列提·拜開依，副教授，碩士生導師，Email:jgxyswlt@xju.edu.cn。參考文獻［1］葉列平，崔衛(wèi)，岳清瑞，等.碳纖維布加固混凝土構件正截面受彎承載力分析［J］.建筑結構,2001，31(3).［2］飛渭,江世永，等.預應力碳纖維布加固混凝土受彎構件試驗研究［C］∥第二屆全國土木纖維增強復合材料（FRP）應用技術交流會論文集,2002.［3］彭飛飛,江世永.數(shù)值模擬預應力CFRP布加固混凝土梁不卸載時的抗彎承載力［J］.四川建筑科學研究, 2003,29(4).［4］尚守平,彭暉，等.預應力碳纖維布材加固混凝土受彎構件的抗彎性能研究［J］.建筑結構學報，2003,24(5).［5］TRIANTAFILLOU T C, DESKOVIC N, DEURING M. Strengthening of concrete structures with pre-stressed fiber reinforced plastic sheets［J］. ACI Structural Journal, 1992, 89(3):235-244.［6］葉列平，莊江波，沙吾列提·拜開依,等. 預應力碳纖維布加固鋼筋混凝土T形梁的試驗研究［J］. 工業(yè)建筑， 2004，370（34）.［7］張軻. 預應力碳纖維布加固混凝土梁彎曲疲勞性能研究［D］. 北京：清華大學，2005.［8］李慶偉. 預應力碳纖維布加固混凝土結構預應力損失及錨固方式實驗研究［D］.北京：中冶集團建筑研究總院，2005.
