中文摘要：

采用材料真实破裂过程三维并行分析（RFPA3D-Parallel）系统，对FRP-混凝土界面的粘结性能进行了三维并行数值试验研究，数值试验再现了FRP-混凝土构件的三维破裂过程演化过程，清晰地表明拉伸载荷作用下FRP-混凝土界面剥离破坏是一个细观损伤不断产生和宏观裂缝形成的渐进过程，FRP-混凝土结构损伤演化过程的声发射揭示了FRP-混凝土结构在外载荷作用下的损伤程度．FRP-混凝土结构在加载过程中的变形剥离破坏过程大致可以划分为弹性变形阶段、弹性软化阶段、弹性软化剥离阶段和软化剥离阶段．数值计算表明RFPA3D-Parallel并行数值模拟方法为FRP-混凝土结构界面剥离破坏过程和机理研究提供了一个很好的途径，同时也为研究FRP-混凝土工程结构等的损伤断裂机理提供了一个新的分析手段．

英文摘要：

In this paper, the 3D Parallel Realistic Failure Process Analysis （RFPA3D-parallel） is employed to investigate the bonding behavior in FRP-concrete interface based on the single shear testing results on FRP-concrete in laboratory. Numerical simulations visually reproduce the complete three-dimensional debonding process and characteristics of FRP bonded to concrete, which is a progressive process induced by meso-scopic cracks initiation and growth and macroscopic fractures form. The damage of FRPconcrete structures under external loading can be founded by monitoring the acoustic emission induced by microcracking in FRP-concrete. Based on the simulated stress evolution and deformation distribution along the length FRP sheet, the deformation and debonding failure can thus be divided into four stages, i. e. , elastic, elastic-softening, elastic-softening：debonded and softening-debonded stage. The numerical approach in this study provides a useful tool for enhancing our understanding of cracking and debonding failure process and mechanism of FRP-concrete and our ability to predict mechanical performance and reliability of these FRP sheet bonded to concrete structures.