FRP混凝土界面損傷演化過程數(shù)值模擬*
彭暉1,2,高勇1,唐雪松1,2,謝超1
- 摘 要
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（1 長沙理工大學(xué)土木與建筑學(xué)院， 長沙 410114；2 長沙理工大學(xué)橋梁工程安全控制教育部重點(diǎn)實(shí)驗(yàn)室， 長沙 410114)［摘要］采用界面單剪試驗(yàn)考察了FRP-混凝土界面的粘結(jié)行為?；谠囼?yàn)結(jié)果和不可逆熱力學(xué)的彈性損傷理論建立了有限元模型，模擬了FRP-混凝土界面在加載過程中的損傷演化，提出了混凝土材料的損傷本構(gòu)模型，編制了相應(yīng)的ABAQUS用戶子程序。結(jié)果表明，F(xiàn)RP-混凝土試件的數(shù)值計算結(jié)果與試驗(yàn)結(jié)果吻合較好，驗(yàn)證了有限元模型的正確性，并給出了混凝土本構(gòu)模型中損傷特性參數(shù)的取值。研究結(jié)果表明，提出的基于損傷理論的有限元數(shù)值計算方法能夠很好地描述FRP-混凝土構(gòu)件整個界面的損傷演化和剝離破壞過程。［關(guān)鍵詞］FRP; 混凝土; 損傷演化; 數(shù)值分析; 有限元模型中圖分類號：TU378 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2015)09-0103-05Numerical simulation on damage evolution process of FRP-concrete interfacePeng Hui1,2, Gao Yong1, Tang Xuesong1,2, Xie Chao1(1 School of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha 410114, China; 2 Ministry of Education Key Laboratory of Safety Control of Bridge Engineering, Changsha University of Science & Technology, Changsha 410114, China)Abstract: The single shear tests were conducted to investigate the bond behavior of the fiber reinforced polymer（FRP）-concrete interface. Based on the experimental data and elastic damage theory from irreversible thermodynamics, the finite element model was established to simulate the damage evolution of FRP-concrete interface during loading process. Moreover, the damage constitutive model of concrete was established and the ABAQUS subprogram was compiled. Results show that the numerical-calculation results of the bond behavior of the specimens are in good agreement with the experimental data, which verifies the accuracy of the finite element model. The value of damage characteristic parameters in concrete constitutive model is offered. The study results show that finite element method based on damage theory can describe the damage evolution and debonding failure process of the whole surface for FRP-concrete component.Keywords: fiber reinforced polymer(FRP); concrete; damage evolution; numerical analysis; finite element model* 國家重點(diǎn)基礎(chǔ)研究發(fā)展計劃項(xiàng)目（2015CB057701），國家自然科學(xué)基金項(xiàng)目（51008036），湖南省教育廳科學(xué)研究重點(diǎn)項(xiàng)目（14A005），湖南省研究生創(chuàng)新項(xiàng)目（CX2014B373）,現(xiàn)代公路交通基礎(chǔ)設(shè)施先進(jìn)建養(yǎng)技術(shù)協(xié)同創(chuàng)新中心項(xiàng)目。作者簡介：彭暉，博士，教授，Email：huipeng1210@gmail.com。參考文獻(xiàn)［1］楊勇新，岳清瑞. 碳纖維布與混凝土粘結(jié)性能的試驗(yàn)研究［J］. 建筑結(jié)構(gòu)學(xué)報，2001，22(3)：36-42.［2］彭暉，王博.CFRP-混凝土界面粘結(jié)的疲勞性能研究［J］. 實(shí)驗(yàn)力學(xué)，2014，29(2)：189-199.［3］TENG J G, CHEN J F, SIMTH S T, et al. FRP-strengthened RC structures ［M］. London: John Wiley & Sons, 2002.［4］陸新征，譚壯，葉列平. FRP布-混凝土界面粘結(jié)性能的有限元分析［J］. 工程力學(xué)，2004，21(6): 45-50.［5］WU Z S. Element-level study on stress transfer based on local bond properties ［R］. Technical Report of JCI Technical Committee on Retrofit Technology, 2003: 44-56.［6］陸新征，葉列平，滕錦光. FRP片材與混凝土粘結(jié)性能的精細(xì)有限元分析［J］. 工程力學(xué)，2006，23(5)：74-82.［7］吳業(yè)飛，陳偉球. 基于內(nèi)聚力模型的FRP-混凝土粘結(jié)強(qiáng)度分析［J］. 工程力學(xué)，2010，27(7)：113-118.［8］王斌，鄭山鎖，李磊. 基于損傷理論的型鋼與混凝土界面損傷分析［J］. 工業(yè)建筑，2010,40（4）：112-120［9］唐雪松，蔣持平，鄭健龍.各向同性彈性損傷本構(gòu)方程的一般形式［J］.應(yīng)用數(shù)學(xué)和力學(xué)，2001，22(12)：1317-1323.［10］TANG X S, JIANG C P, ZHENG J L. Anisotropic elastic constitutive relations for damaged materials by application of irreversible thermodynamics ［J］. Theoretical and Applied Fracture Mechanics, 2002, 38(3): 211-220.［11］CHANDRA N, LI H, SHET C, et al. Some issues in the application of cohesive zone models for metal-ceramic interfaces ［J］. International Journal of Solids and Structures, 2002, 39(10): 2827-2855.［12］PARK K, PAULINO G H, ROESLER J R. A unified potential-based cohesive model of mixed-mode fracture ［J］. Journal of the Mechanics and Physics of Solids, 2009, 57(6): 891-908.［13］ANYFANTIS K N, TSOUALIS N G. A novel traction-separation law for the prediction of the mixed mode response of ductile adhesive joints ［J］. International Journal of Solids and Structures, 2012, 49(1): 213-226.［14］CAMANHO P P, DAVILA C G. Mixed-mode decohesion finite elements for the simulation of delamination in composite materials ［R］. Washington D.C.:NASA,2002.［15］ ABAQUS 612 User’s manual［M］.ABAQUS, Inc. Providence, 2012.［16］UEDA T, DAI J G, SATO Y. A nonlinear bond stress-slip relationship for FRP sheet-concrete interface［C］//Proc. of International Symposium on Latest Achievement of Technology and Research on Retrofitting Concrete Structures. 2003: 113-120.［17］徐濤，唐春安，張永彬，等.FRP-混凝土界面剝離破壞過程并行數(shù)值模擬［J］. 固體力學(xué)學(xué)報，2011，32(1)：88-94.
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