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<p>This study investigates the comparative responses of high-performance fiber-reinforced concrete (HPFRC) beams under experiment and prediction. Two beam types were analyzed: a short beam (S450) and a long beam (L1200). The S450 beam (200 × 200 × 500&#xa0;mm, span length 450&#xa0;mm) and the L1200 beam (200 × 200 × 1300&#xa0;mm, span length 1200&#xa0;mm) were tested under three-point bending. Both beam types featured the same mortar matrix and hybrid fiber reinforcement, consisting of 1.5% hooked-end fibers by volume and 0.5% straight smooth fibers by volume. The results indicated that the short beam exhibited higher deflection capacity and energy absorption relative to its peak load, whereas the long beam demonstrated greater ductility. An analytical model was developed to estimate the flexural and shear resistance of hybrid fiber-reinforced concrete beams. Additionally, the numerical simulations effectively predicted the mechanical performance of the beams, with the load–deflection responses of the HPFRC beams closely matching the experimental results.</p>

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Comparative Responses of High-Performance Fiber-Reinforced Concrete Beams under Experiment and Prediction

  • 期刊论文

  • 发表日期：

    2026年2月3日

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  • Duy-Liem Nguyen,
  • Tan-Khoa Nguyen,
  • H. T. Tai Nguyen,
  • Ngoc-Thanh Tran,
  • Kha-Ky Lam,
  • Thi-Ngoc-Han Vuong

摘要

This study investigates the comparative responses of high-performance fiber-reinforced concrete (HPFRC) beams under experiment and prediction. Two beam types were analyzed: a short beam (S450) and a long beam (L1200). The S450 beam (200 × 200 × 500 mm, span length 450 mm) and the L1200 beam (200 × 200 × 1300 mm, span length 1200 mm) were tested under three-point bending. Both beam types featured the same mortar matrix and hybrid fiber reinforcement, consisting of 1.5% hooked-end fibers by volume and 0.5% straight smooth fibers by volume. The results indicated that the short beam exhibited higher deflection capacity and energy absorption relative to its peak load, whereas the long beam demonstrated greater ductility. An analytical model was developed to estimate the flexural and shear resistance of hybrid fiber-reinforced concrete beams. Additionally, the numerical simulations effectively predicted the mechanical performance of the beams, with the load–deflection responses of the HPFRC beams closely matching the experimental results.