Finite element analysis of fatigue damaged reinforced concrete one-way slabs repaired with CFRP sheets

In twenty-eight samples in this study, the structural behavior of fatigue-damaged one-way slabs was produced using a nonlinear finite element model that was created using ABAQUS. The effect of carbon fiber-reinforced polymer (CFRP) parameters and fatigue-damaged percentages is examined to obtain a better reaction. The full model accounts for the elastic and plastic behavior of the materials and uses three-dimensional parts (solid, shell, and truss). To investigate the accuracy of the model, the authors' experimental data (monotonic and fatigue damage) is used to validate the numerical outputs. For the four verified slabs, the average and coefficient of variations for ultimate load of finite element analysis to ultimate load of experimental work were 0.997 and 5.35%, respectively; for the deflection of finite element analysis to deflection of experimental work, they were 1.197 and 15.99%, and for energy absorption, they were 1.134 and 12.2%, respectively. Twenty-four samples parametric studies using the impacts of CFRP sheet thickness, CFRP sheet modulus of elasticity, CFRP sheet length, the concrete compressive strength value, and the fatigue damage percentage. Examining these metrics was intended to provide insight into the efficacy and structural performance of the employed fortification technology. The numerical findings demonstrated that the technique of externally bonding CFRP sheets to strengthen damaged slabs may be regarded as a successful, and cost-effective method.