The aim of this study is to create a nonlinear FE model able to predict the mechanical behavior of RC wall/slab connections strengthened by using Carbon Fiber Reinforced Polymers. The experimental mechanical behavior of 4 full scale RC wall/slab connections with a reference join and 3 strengthened by FRP are investigated from members of our researcher team. The 3D finite-element micromodel of the RC wall/slab connections is conducted utilizing the FE software ABAQUS, reproducing the actual geometry of the experiments, as well as the same boundary conditions and loading as in the experimental program. The analytical investigation is carried out through an extended comparative parametric study and is focused on the quantitative influence of certain simplified modelling assumptions and several critical modelling parameters on the response of the system. The accuracy of the 3D model was assessed against the experimental results..
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