［摘要］共进行了7根粘贴CFRP板加固木梁的对比试验研究，其中3根为对比试件，4根为粘贴CFRP板加固木梁试件。研究结果表明，粘贴CFRP板加固木梁的极限承载力有明显提高，提高幅度为13.9%~63.4%，平均提高45.3%；极限位移亦有所提高，平均提高22.2%；初始弯曲刚度略有提高，提高幅度为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。粘贴CFRP板是一种有效加固木梁的方法。
［关键词］木梁； CFRP板； 加固； 受弯承载力
中图分类号：TU366.2文献标识码：A文章编号：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
*国家“十一五”科技支撑计划（2006BAJ04A03.03）,上海市科委青年科技启明星跟踪计划（11QH1402100）。
作者简介：李向民，博士，高级工程师，Email：lxm_sh@tom.com。
参考文献
［1］许清风, 朱雷. FRP加固木结构的研究进展［J］. 工业建筑， 2007,37(9):104-108
［2］PLEVRIS N, TRIANTAFILLOU T. FRPreinforced 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］马建勋, 蒋湘闽, 胡平, 等. 碳纤维布加固木梁抗弯性能的试验研究 ［J］. 工业建筑, 2005,35(8):35-39
［5］张大照. CFRP布加固修复木柱梁性能研究 ［D］. 上海：同济大学, 2003
［6］祝金标, 王柏生, 王建波. 碳纤维布加固破损木梁的试验研究 ［J］. 工业建筑, 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 bondedin 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