- 摘 要
-
［摘要］共進行了7根粘貼CFRP板加固木梁的對比試驗研究，其中3根為對比試件，4根為粘貼CFRP板加固木梁試件。研究結果表明，粘貼CFRP板加固木梁的極限承載力有明顯提高，提高幅度為13.9%~63.4%，平均提高45.3%；極限位移亦有所提高，平均提高22.2%；初始彎曲剛度略有提高，提高幅度為3.6%~22.7%，平均提高15.8%。加固木梁跨中截面仍基本符合平截面假定。粘貼CFRP板是一種有效加固木梁的方法。
［關鍵詞］木梁； CFRP板； 加固； 受彎承載力
中圖分類號：TU366.2文獻標識碼：A文章編號：1002-848X(2011)10-0123-03
Experimental research on timber beams strengthened with CFRP plates
Li Xiangmin1,2, Xu Qingfeng1,2(1 Shanghai Key Laboratory of New Technology Research on Engineering Structure, Shanghai 200032, China;2 Shanghai Research Institute of Building Sciences (Group), Co., Ltd., Shanghai 200032, China)
Abstract:Seven timber beams were studied through comparative experiment, including three reference unstrengthened beams and four beams strengthened with CFRP plates externally bonded to the tension face. The test results show that the ultimate flexural strength of strengthened timber beams are increased by 13.9%~63.4% (with an average value of 45.3%) due to the strengthening. The ultimate displacement of strengthened beams also have an average increase of 22.2%. The initial stiffness of the strengthened beams is also significantly increased by 3.6%~22.7%(with an average value of 15.8%). The strain distribution along the height of the strengthened beams at middle-span is nearly linear during the whole loading process. It is an effective technique to strength timber beams with CFRP plates.
Keywords:timber beam; CFRP plate; strengthening; flexural strength
*國家“十一五”科技支撐計劃（2006BAJ04A03.03）,上海市科委青年科技啟明星跟蹤計劃（11QH1402100）。
作者簡介：李向民，博士，高級工程師，Email：lxm_sh@tom.com。
參考文獻
［1］許清風, 朱雷. FRP加固木結構的研究進展［J］. 工業(yè)建筑， 2007,37(9):104-108
［2］PLEVRIS N, TRIANTAFILLOU T. FRPreinforced wood as structural material ［J］. Journal of Materials in Civil Engineering,1992,4(3):300-317
［3］JOHNS K, LACROIX S. Composite reinforcement of timber in bending ［J］. Canadian Journal of Civil Engineering, 2000,27(5):899-906
［4］馬建勛, 蔣湘閩, 胡平, 等. 碳纖維布加固木梁抗彎性能的試驗研究 ［J］. 工業(yè)建筑, 2005,35(8):35-39
［5］張大照. CFRP布加固修復木柱梁性能研究 ［D］. 上海：同濟大學, 2003
［6］祝金標, 王柏生, 王建波. 碳纖維布加固破損木梁的試驗研究 ［J］. 工業(yè)建筑, 2005,35(10):86-89
［7］GENTILE C, SVECOVA D, RIZKALLA F. Timber beams strengthened with GFRP bars: development and applications ［J］. Journal of Composites for Construction, 2002, 6(1):11-20
［8］DE LORENZIS L, SCIALPI V, LA TEGOLA A. Analytical and experimental study on bondedin CFRP bars in glulam wood ［J］. Composite Part B: Engineering, 2005,36(4):279-289
［9］CARRADI M, BORRI A. Fir and chestnut wood beams reinforced with GFRP pultruded elements ［J］. Composite Part B: Engineering, 2007,38(2):172-181
