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In this research, the feasibility of strengthening self-centering walls by high-performance concrete was investigated through an experimentally validated finite element model. The effects of the wall’s axial stress and tendons’ prestressing ratios on the wall’s damage, and the effectiveness of potential strengthening approaches were studied through 40 independent scenarios, and 360 different cases. Using the estimated damage from numerical results at the compression zone near the bottom corners, the maximum compressive strain of the concrete at the walls’ toe regions was estimated. Using the calibrated concrete strain, a practical approach was proposed to delimit both the walls’ damaged height and the crushed height. The heights’ information was used to investigate two potential strengthening approaches by either retrofitting (for damaged walls) or rehabilitating (for newly constructed walls). Increasing the …