Finite Element Modeling of Reinforced Concrete beam Strengthened by Concrete Overlay | ||
| Engineering Research Journal | ||
| Volume 184, Issue 4, September 2025, Pages 262-282 PDF (1.27 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/erj.2025.386478.1239 | ||
| Authors | ||
| Ehsan Nabil Baraka* ; Mohamed Mohamed Yehia; Nehal Magdy Ayash; Alaa Gamal Sherif | ||
| Civil Engineering Department, Faculty of Engineering Mataria, Helwan University, Cairo, Egypt | ||
| Abstract | ||
| This study investigates the flexural behavior of reinforced concrete beams strengthened with a con-crete overlay under static loading conditions. Numerical simulations were performed using ABAQUS, and the finite element model was validated against experimental data to ensure accuracy. A comprehensive parametric study was conducted, considering variables such as overlay thickness, the area of longitudinal tensile reinforcement, and the compressive strength of concrete. Key perfor-mance indicators—including load-deflection behavior, flexural capacity, and ductility ratio—were analyzed. The findings reveal that increasing the thickness of the concrete overlay leads to a reduc-tion in both flexural stiffness and ultimate moment capacity across all types of interface conditions, compared to the un-strengthened control beam. In contrast, enhancing the compressive strength of the overlay resulted in a 7% increase in load-bearing capacity. Although stiffness improved, a no-ticeable decrease in ductility was observed, with the ductility ratio reaching 5.8. Furthermore, both higher overlay compressive strength and a greater area of longitudinal reinforcement were associated with improved flexural performance. | ||
| Keywords | ||
| Ductility; Concrete overlay; R.C beam | ||
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