<p>To ensure satisfactory performance, jacketed structural elements require effective shear stress transfer across the interface between the existing concrete (substrate) and the added layer. Preserving the connection integrity between these materials is crucial to avoid debonding of the strengthened layer, particularly when the rehabilitated element is re-subjected to service loading conditions. In this way, the present work aims to evaluate the load capacity of reinforced concrete columns strengthened with self-compacting concrete (SCC) and wedge bolts, focusing on the mechanical treatment of the connection interface. For this purpose, connection elements available in the ATENA software library were used. The adopted modeling strategies were validated by comparing the numerical results with experimental data from scientific literature. In general, the modeling methodology adequately simulated the mechanical behavior of the strengthened columns, with a maximum variation of 13.7% between the experimental and numerical ultimate loads. With the validated numerical models, it was confirmed that the wedge bolts near the supports are responsible for transferring shear forces between the substrate and the strengthened layer. At the same time, due to the low slenderness of the columns, all wedge bolts contribute significantly to preventing horizontal displacements and spalling of the SCC layer. It was found that the addition of more wedge bolts near the supports increased the load capacity of the strengthened column. This effect was particularly evident when comparing the reference columns with 18 and 34 connectors, which exhibited a strength gain of 10.0% in the models with connectors placed near the outer region of the column (“e”) and 11.8% in those with connectors placed near the inner region (“i”). Despite these positive points, special care must be taken with the spacing between connectors, as very small distances can lead to stress concentrations that reduce the column’s load-bearing capacity.</p>