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<p>This study examines the structural performance of beams reinforced with steel fiber-reinforced polymer composite bars (SFCB), focusing on four key parameters: reinforcement material type (steel, GFRP, and SFCB), SFCB size, splice length near the maximum moment region, and the effect of shear reinforcement. Eleven beams of uniform dimensions (250 mm width, 4200 mm length, 400 mm depth) were tested under two-point loading until failure. The research methodology involved measuring deflection, strain distribution, crack propagation, and ultimate load-bearing capacity. Findings indicate that SFCB-reinforced beams exhibit enhanced post-cracking stiffness and shear resistance, with the steel-core diameter playing a crucial role. The inclusion of stirrups significantly improved overall performance, reducing strains by 10–50%. Increasing the splice length led to a 10% reduction in deflection and up to a 28% increase in resistance. Normalized shear stress analysis showed that steel-reinforced beams exhibited 38–157% greater strength than their SFCB-reinforced counterparts. Comparisons with international standards suggest that a reduction factor of approximately 0.4 is necessary to accurately estimate the shear strength of SFCB-reinforced beams. The study concludes that SFCB reinforcement enhances stiffness, deflection control, and load-bearing capacity compared to GFRP reinforcements, making it a viable alternative for reinforced concrete beam applications.</p>

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Experimental assessment of the performance of composite SFCB-RC beams

  • 期刊论文

  • 发表日期：

    2025年7月12日

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  • Ahmed Gouda,
  • Mohamed Hatem,
  • Magdy Genidi,
  • Mohamed H. Agamy

摘要

This study examines the structural performance of beams reinforced with steel fiber-reinforced polymer composite bars (SFCB), focusing on four key parameters: reinforcement material type (steel, GFRP, and SFCB), SFCB size, splice length near the maximum moment region, and the effect of shear reinforcement. Eleven beams of uniform dimensions (250 mm width, 4200 mm length, 400 mm depth) were tested under two-point loading until failure. The research methodology involved measuring deflection, strain distribution, crack propagation, and ultimate load-bearing capacity. Findings indicate that SFCB-reinforced beams exhibit enhanced post-cracking stiffness and shear resistance, with the steel-core diameter playing a crucial role. The inclusion of stirrups significantly improved overall performance, reducing strains by 10–50%. Increasing the splice length led to a 10% reduction in deflection and up to a 28% increase in resistance. Normalized shear stress analysis showed that steel-reinforced beams exhibited 38–157% greater strength than their SFCB-reinforced counterparts. Comparisons with international standards suggest that a reduction factor of approximately 0.4 is necessary to accurately estimate the shear strength of SFCB-reinforced beams. The study concludes that SFCB reinforcement enhances stiffness, deflection control, and load-bearing capacity compared to GFRP reinforcements, making it a viable alternative for reinforced concrete beam applications.