Finite-element modelling of FRP-to-concrete bonded joints subjected to the quasi-static monotonic cyclic loading using dynamic explicit approach

Fibre-reinforced polymer (FRP) composites have generated considerable interest as a strengthening material for existing reinforced concrete (RC) structures due its advantages such as, high strength-toweight ratio, excellent corrosion resistance, and simplicity of its application. A large number of experimental studies has been conducted to investigate the behaviour of FRP to concrete bonded joints under quasi static monotonic loading. Meso-scale finite element modelling approaches using dynamic explicit approach have also been successfully used to study the behaviour of FRP-to-concrete bonded joints. However, only few studies have been conducted on understanding the behaviour of FRP-toconcrete bonded joints under cyclic loading. This paper presents a finite element (FE) model to simulate the behaviour of FRP to concrete bonded joints under quasi static monotonic and cyclic loading. The ability of the model to predict the behaviour of FRP-to-concrete bonded joints was validated using existing experimental results. The model was then used to simulate the behaviour of similar bonded joints under quasi-static cyclic loading. Results were compared with the experimental results. It was found that the compression recovery factor significantly influences the load-displacement behaviour of the FRP-to-concrete bonded joints.