Using Karpenko's Model to Predict Reinforcing Steel's Stress-Strain Curve and Comparing it to Approved Models

Abstract—This study aims to enhance the understanding of the stress-strain behavior of reinforced steel using Karpenko's analytical model. The analytical results were compared with experimental data from many previous studies (Gamble, Goto, and, Cho) for both mild and high-strength steel. The model demonstrated high accuracy in predicting steel behavior, with discrepancies between analytical and experimental results not exceeding 5.7% for mild steel and 2.5% for high-strength steel. The study emphasized the critical role of mechanical properties, such as the Elastic Modulus, in determining material behavior under various loads. The model proves to be a powerful tool for improving engineering designs, such as bridges and buildings, enhancing safety and efficiency in practical applications. Keywords: Karpenko's model, stress-strain curve, mild steel, high-strength steel, estimate model, comparing models.