Nonlinear numerical analysis of the debonding failure process of FRP-to-concrete interfaces

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• 作者：Hugo C. Biscaia ; ^{hb@fct.unl.pt} ; Carlos Chastre ; Manuel A.G. Silva
• 关键词：A. Laminates ; B. Debonding ; B. Interface ; C. Numerical analysis ; Concrete
• 刊名：Composites Part B: Engineering
• 出版年：2013
• 出版时间：July, 2013
• 年：2013
• 卷：50
• 期：Complete
• 页码：210-223
• 全文大小：2329 K

文摘

The paper analyses numerical solutions for the process leading to debonding failure of fibre reinforced polymers (FRP)-to-concrete interfaces in shear tests with the FRP plate subjected to a tensile load at one end. Any realistic local nonlinear bond-slip law can be used in the numerical analysis proposed in the present study. However, only a Popovics¡¯ type expression is employed in the numerical process due to its use in different studies found in the literature. Effective bond length (L_eff) is discussed and an expression depending on the Popovics¡¯ constant (n_P) is proposed to calculate it. Assuming a fracture in pure Mode II, the debonding process is analysed in detail and distributions of bond stresses and strains in the FRP plate along the interface are presented. The load-displacement behaviour is also presented and the influence of the local bond-slip law on the debonding process is discussed.