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The combination of Ultra High Performance Fiber Reinforced Concrete (UHPFRC) with steel rebars (R-UHPFRC) provides enhanced mechanical properties and durability, allowing for significant improvement in the robustness and sustainability of new or existing structures. However, the synergy between UHPFRC and steel rebars has not yet been quantitatively determined, and the influence of reinforcement ratio on the tensile properties of R-UHPFRC is still lacking. To address these issues, this experimental study conducted direct tensile tests on 3 UHPFRC and 26 R-UHPFRC specimens with different reinforcement ratios. Based on Digital Image Correlation (DIC) analysis, the fracture characteristic of R-UHPFRC in tension is accurately captured. The effects of reinforcement ratios on the tensile performance (including the elastic limit, ultimate strength, hardening strain and cracking pattern) and failure mode of R-UHPFRC is investigated quantitatively.

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Tensile Behavior and Fracture Characteristic of R-UHPFRC with Different Reinforcement Ratios

  • 会议论文

  • 发表日期：

    2025年

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  • Qingcong Xiong,
  • Xiujiang Shen,
  • Rensheng Pan

摘要

The combination of Ultra High Performance Fiber Reinforced Concrete (UHPFRC) with steel rebars (R-UHPFRC) provides enhanced mechanical properties and durability, allowing for significant improvement in the robustness and sustainability of new or existing structures. However, the synergy between UHPFRC and steel rebars has not yet been quantitatively determined, and the influence of reinforcement ratio on the tensile properties of R-UHPFRC is still lacking. To address these issues, this experimental study conducted direct tensile tests on 3 UHPFRC and 26 R-UHPFRC specimens with different reinforcement ratios. Based on Digital Image Correlation (DIC) analysis, the fracture characteristic of R-UHPFRC in tension is accurately captured. The effects of reinforcement ratios on the tensile performance (including the elastic limit, ultimate strength, hardening strain and cracking pattern) and failure mode of R-UHPFRC is investigated quantitatively.