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<p>Nepal is situated in a seismically active region, and there is a growing requirement for the continuous development of the seismic code, and the reliance on precise techniques, such as numerical analysis, becomes pivotal for the thorough evaluation of code provisions. The study aims to compare the shear strength obtained from numerical analysis with NBC 105:2020 predictions, assessing how it differs from predictions made by EN 1998-1 (2004), IS 13920:2016, ACI 318-19, and NZS 3101-1:2006. Also comparison of beam–column joint designed with older MRT recommendations is made with current NBC 105:2020 recommendations. Utilizing a mesh-insensitive CDP model integrated into the ABAQUS standard, a numerical database was formed through nonlinear static analyses involving monotonic load increments on thirty-three study joints. The force–displacement behaviour of beam column joints, as well as the maximum shear force withstood by these joints are presented. Reliability of the numerical database is determined by developing a shear strength equation derived from the numerical database, incorporating the shear strength model found in existing literature, and implemented on a database of experimental tests. Finally, statistical evaluation comparing the shear strength predicted by the codes with that obtained from the numerical study is provided. The conclusion indicates that a code-compliant numerical database of beam–column joints effectively assesses shear strength provision of NBC 105:2020, and this code provides a satisfactory prediction when compared to other codes. However, equation calibrated based on various parameters gives accurate shear strength predictions for beam–column joints that comply with code requirements, providing minimal standard deviation in comparison. The modified equation can act as a practical resource for engineers to assess the behaviour of RC beam–column joints and the methodology and findings may also be applicable to regions with similar seismic risks and evolving building codes. In short, this research provides valuable insights for policymakers, facilitating the development of safer and more resilient beam–column joint designs in the seismic context of Nepal.</p>

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Assessment of behaviour of reinforced concrete beam–column joints: a comparison of NBC 105:2020 and international standards

  • 期刊论文

  • 发表日期：

    2025年2月8日

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  • Dipesh Jaisi Poudel,
  • Hemchandra Chaulagain

摘要

Nepal is situated in a seismically active region, and there is a growing requirement for the continuous development of the seismic code, and the reliance on precise techniques, such as numerical analysis, becomes pivotal for the thorough evaluation of code provisions. The study aims to compare the shear strength obtained from numerical analysis with NBC 105:2020 predictions, assessing how it differs from predictions made by EN 1998-1 (2004), IS 13920:2016, ACI 318-19, and NZS 3101-1:2006. Also comparison of beam–column joint designed with older MRT recommendations is made with current NBC 105:2020 recommendations. Utilizing a mesh-insensitive CDP model integrated into the ABAQUS standard, a numerical database was formed through nonlinear static analyses involving monotonic load increments on thirty-three study joints. The force–displacement behaviour of beam column joints, as well as the maximum shear force withstood by these joints are presented. Reliability of the numerical database is determined by developing a shear strength equation derived from the numerical database, incorporating the shear strength model found in existing literature, and implemented on a database of experimental tests. Finally, statistical evaluation comparing the shear strength predicted by the codes with that obtained from the numerical study is provided. The conclusion indicates that a code-compliant numerical database of beam–column joints effectively assesses shear strength provision of NBC 105:2020, and this code provides a satisfactory prediction when compared to other codes. However, equation calibrated based on various parameters gives accurate shear strength predictions for beam–column joints that comply with code requirements, providing minimal standard deviation in comparison. The modified equation can act as a practical resource for engineers to assess the behaviour of RC beam–column joints and the methodology and findings may also be applicable to regions with similar seismic risks and evolving building codes. In short, this research provides valuable insights for policymakers, facilitating the development of safer and more resilient beam–column joint designs in the seismic context of Nepal.