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Researchers have investigated using glass fibre-reinforced polymer (GFRP) bars as the primary reinforcement in deep beams to overcome corrosion problems inherently associated with steel reinforcement. This study investigates the suitability of the strut-and-tie (STM) adopted by ACI 318 Code for GFRP-reinforced deep beams. A database of forty-two deep beams longitudinally reinforced with GFRP, without web reinforcement, all with shear span-to-depth ratios of less than 2.5, was compiled. Experimental data were employed to assess the implemented changes to the STM recommended by the ACI 318 (2019) code in comparison to the former version of ACI 318 (2014). The results revealed that the ACI 318 (2019) was more satisfying in capturing the capacity of deep beams than the older version of the ACI 318 (2014), with an average experimental to predicted value of 1.65. Additionally, the STM provided by ACI 318 (2019) yielded a high coefficient of variation of 45%.

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Applicability and Strut Efficiency of Strut-and-Tie Model Adopted by the ACI-318 for GFRP Deep Beams

  • 会议论文

  • 发表日期：

    2025年

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  • Mohamed Y. A. Abbas,
  • Khaled Mohamed,
  • Ahmed Sabry Farghaly,
  • Brahim Benmokrane

摘要

Researchers have investigated using glass fibre-reinforced polymer (GFRP) bars as the primary reinforcement in deep beams to overcome corrosion problems inherently associated with steel reinforcement. This study investigates the suitability of the strut-and-tie (STM) adopted by ACI 318 Code for GFRP-reinforced deep beams. A database of forty-two deep beams longitudinally reinforced with GFRP, without web reinforcement, all with shear span-to-depth ratios of less than 2.5, was compiled. Experimental data were employed to assess the implemented changes to the STM recommended by the ACI 318 (2019) code in comparison to the former version of ACI 318 (2014). The results revealed that the ACI 318 (2019) was more satisfying in capturing the capacity of deep beams than the older version of the ACI 318 (2014), with an average experimental to predicted value of 1.65. Additionally, the STM provided by ACI 318 (2019) yielded a high coefficient of variation of 45%.