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<p>Beam-column joints are among the most critical areas in the design of reinforced concrete structures, and accurately determining the shear strength capacity of these joints can be a matter of vital importance. In recent years, gene expression programming (GEP) has been frequently used in civil engineering problems to provide safe designs. In this study, two new comprehensive formulations have been proposed that consider ten input parameters believed to influence the shear strength capacities of exterior and interior beam-column joints, using GEP. For this reason, a large experimental database was created by collecting a total of 781 data points from experimental studies in the literature, with 492 for exterior joints and 289 for interior joints. The outcomes of the GEP formula were statistically analyzed in comparison with the experimental results from the literature and the results obtained from the equations in the design code provisions. The comparison results demonstrated that the GEP-based formulation outperforms the other proposed models in terms of performance and accuracy. Additionally, a sensitivity analysis and parametric study were performed to assess the key parameters influencing the shear capacity of beam-column joints.</p>

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Shear strength capacity estimation for exterior and interior beam-column joints through gene expression programming

  • 期刊论文

  • 发表日期：

    2026年3月24日

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  • Mehmet Safa Aydogan,
  • Sema Alacali,
  • Guray Arslan

摘要

Beam-column joints are among the most critical areas in the design of reinforced concrete structures, and accurately determining the shear strength capacity of these joints can be a matter of vital importance. In recent years, gene expression programming (GEP) has been frequently used in civil engineering problems to provide safe designs. In this study, two new comprehensive formulations have been proposed that consider ten input parameters believed to influence the shear strength capacities of exterior and interior beam-column joints, using GEP. For this reason, a large experimental database was created by collecting a total of 781 data points from experimental studies in the literature, with 492 for exterior joints and 289 for interior joints. The outcomes of the GEP formula were statistically analyzed in comparison with the experimental results from the literature and the results obtained from the equations in the design code provisions. The comparison results demonstrated that the GEP-based formulation outperforms the other proposed models in terms of performance and accuracy. Additionally, a sensitivity analysis and parametric study were performed to assess the key parameters influencing the shear capacity of beam-column joints.