Evaluations of smart self-repaired RC beams

In this research the author implemented numerous investigations employing finite element analysis (FEA) in order to address the impact of the strengthening techniques with various shear reinforcement ratios on the maximum beam's capacity and their maximum deformations. The previous experimental study by the researchers focused on the development self-restoring mode to monitor the initiated cracks and stress. The performance of RC beams has been enhanced by internally injection ducts, beams strengthened by nitinol smart bars, and beams with a combination of both. They have studied using a three-dimensional (3D) nonlinear finite element (FE) model created by ABAQUS. The FE model incorporates geometric and material nonlinearities in concrete, steel, and Nitinol reinforcement, which is confirmed by comparing beams capacities and failure modes to published literature. The influences of two parameters: (a) strengthening configuration and (b) shear reinforcement ratio are investigated in complete parametric analysis comprising 12 models. Results indicated that The Finite Element model performance is equivalent to the experimental investigation utilized as a reference. The variances in terms of ultimate load capacity did not surpass 5%. when compared to experimental data. The proportion of ACI and FEM ultimate loads varied between 72 and 101 percent. Due to the criteria of safety as prescribed by the ACI to assure conservative design, FEM and the experimental ultimate loads have higher values compared to ACI analytical values.