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<p>However, studies concluded that FRP-RC members showed a restricted ability to ductile when bent. The behavior of concrete beams reinforced with FRP bars was enhanced using embedded steel sections and ultra-high-performance strain-hardening cementitious composite. Eight specimens with 120 × 200 × 2200 mm measuring were subjected to four-point bending tests. The variables under test comprised the casted material, either concrete or UHP-SHCC, the type of the main reinforcement, which included BFRP, GFRP, and CFRP, the percentage of the beam's depth (between 50 and 75%) in the UHP-SHCC layer, and the presence of a structural steel section. Steel composite beams covered with different kinds of UHP-SHCC and NSC might have their flexural performance modeled using the ABAQUS software. Three failure mechanisms for the tested beams were identified by the test results: tensile failure of the FRP bars, I beam yielding and followed by concrete crushing, and I beam yielding and followed by then FRP fracture. According to the test results, encasing tested beams with UHP-SHCC improves their load energy dissipation capacity, ductility, and carrying capacity, which will improve using FRP bars. Furthermore, a notable parameter that made the failure mode more ductile was the presence of embedded steel parts.</p>

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Enhancing the Behavior of Concrete Beams Reinforced with FRP Bars Using Embedded Steel Sections and Ultra-high-performance Strain-Hardening Cementitious Composite

  • 期刊论文

  • 发表日期：

    2025年3月13日

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  • Mostafa El-Bosiely,
  • Ahmed Nabil,
  • Nageh N. Meleka,
  • Boshra Eltaly

摘要

However, studies concluded that FRP-RC members showed a restricted ability to ductile when bent. The behavior of concrete beams reinforced with FRP bars was enhanced using embedded steel sections and ultra-high-performance strain-hardening cementitious composite. Eight specimens with 120 × 200 × 2200 mm measuring were subjected to four-point bending tests. The variables under test comprised the casted material, either concrete or UHP-SHCC, the type of the main reinforcement, which included BFRP, GFRP, and CFRP, the percentage of the beam's depth (between 50 and 75%) in the UHP-SHCC layer, and the presence of a structural steel section. Steel composite beams covered with different kinds of UHP-SHCC and NSC might have their flexural performance modeled using the ABAQUS software. Three failure mechanisms for the tested beams were identified by the test results: tensile failure of the FRP bars, I beam yielding and followed by concrete crushing, and I beam yielding and followed by then FRP fracture. According to the test results, encasing tested beams with UHP-SHCC improves their load energy dissipation capacity, ductility, and carrying capacity, which will improve using FRP bars. Furthermore, a notable parameter that made the failure mode more ductile was the presence of embedded steel parts.