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<p>The stress–strain relationship of concrete is a key factor in structural engineering, helping to determine how concrete elements respond to loads in terms of strength and deformation. The accuracy of these evaluations depends on the shape of the stress–strain curve, the mathematical model used to represent it, the precise identification of the peak stress point, and the behavior of the material after reaching its peak strength. Energy-based modeling has gained recognition as a powerful and adaptable approach for analyzing concrete mechanical properties. By integrating the stress–strain curve, this method effectively captures energy dissipation and material behavior, providing valuable insights into performance. This study utilizes energy-based modeling to analyze experimental data and develop a more simple and precise stress–strain relationship for concrete. The proposed model is rigorously evaluated by comparing its predictions with experimental results and the idealized response curves from various structural design codes. The findings reveal that the new model aligns more closely with experimental data. This improved accuracy highlights its potential to enhance the reliability of concrete behavior predictions in structural applications.</p>

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A simplified trilinear concrete stress–strain curve: energy-based modeling of experimental data compliant with various codes

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月23日

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  • Hamdy A. Elgohary

摘要

The stress–strain relationship of concrete is a key factor in structural engineering, helping to determine how concrete elements respond to loads in terms of strength and deformation. The accuracy of these evaluations depends on the shape of the stress–strain curve, the mathematical model used to represent it, the precise identification of the peak stress point, and the behavior of the material after reaching its peak strength. Energy-based modeling has gained recognition as a powerful and adaptable approach for analyzing concrete mechanical properties. By integrating the stress–strain curve, this method effectively captures energy dissipation and material behavior, providing valuable insights into performance. This study utilizes energy-based modeling to analyze experimental data and develop a more simple and precise stress–strain relationship for concrete. The proposed model is rigorously evaluated by comparing its predictions with experimental results and the idealized response curves from various structural design codes. The findings reveal that the new model aligns more closely with experimental data. This improved accuracy highlights its potential to enhance the reliability of concrete behavior predictions in structural applications.