Analytical and Numerical Modelling of FRP Debonding from Concrete Substrate under Pure Shearing  

作　　者：PAN Jinlong XU Zhun C K Y Leung LI Zongjin 潘金龙;XU Zhun;C K Y Leung;LI Zongjin(Key Laboratory of Concrete and Pre-stressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 210096;Dept.of Civil and Environmental Engineering,Hong Kong University of Science and Technology,HongKong,China)

机构地区：[1]Key Laboratory of Concrete and Pre-stressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 210096 [2]Dept.of Civil and Environmental Engineering,Hong Kong University of Science and Technology,HongKong,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2012年第1期142-148,共7页武汉理工大学学报（材料科学英文版）

基　　金：the National Basic Research Program of China (973 Project) (No. 2009CB623200);National Natural Science Foundation of China (No. 50808043);the Doctoral Program of Higher Education of China (No. 20070286024);the Priority Academic Program Development of Jiangsu Higher Education Institutions

摘　　要：External bonding of fiber reinforced polymer （FRP） composites on the concrete structures has been proved to be an effective and efficient way to strengthen concrete structures. For a FRP strengthened concrete beam, it is usually observed that the failure occurs in the concrete and a thin layer of concrete is attached on the surface of the debonded FRP plate. To study the debond behavior between concrete and FRP composites, an analytical model based on the three-parameter model is developed to study the debonding behavior for the FRP-to-concrete joint under pure shearing. Then, nonlinear FEM analysis is conducted to verify the PrOposed analytical model. The FEM results shows good agreement with the results from the model. Finally, with the analytical model, sensitivity analyses are performed to study the effect of the interracial parameters or the ~eometric parameters on the debondin~ behavior.External bonding of fiber reinforced polymer （FRP） composites on the concrete structures has been proved to be an effective and efficient way to strengthen concrete structures. For a FRP strengthened concrete beam, it is usually observed that the failure occurs in the concrete and a thin layer of concrete is attached on the surface of the debonded FRP plate. To study the debond behavior between concrete and FRP composites, an analytical model based on the three-parameter model is developed to study the debonding behavior for the FRP-to-concrete joint under pure shearing. Then, nonlinear FEM analysis is conducted to verify the PrOposed analytical model. The FEM results shows good agreement with the results from the model. Finally, with the analytical model, sensitivity analyses are performed to study the effect of the interracial parameters or the ~eometric parameters on the debondin~ behavior.

关 键 词：FRP composites debonding behavior analytical model nonlinear FEM analysis 

分 类 号：TU823[建筑科学]