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<p>Shear walls are widely used in concrete buildings to resist gravity and lateral loadings. However, these walls are vulnerable to reinforcement corrosion and material aging. In this study, cyclic axial load tests (tension and compression) were conducted on rectangular reinforced concrete (RC) prisms to simulate shear wall boundary elements. The rectangular prisms were lightly confined using carbon fiber-reinforced polymer (CFRP) mesh as the transverse reinforcement material, which was proposed as a corrosion-resistant replacement for traditional steel transverse reinforcement in concrete members. The main test parameters included the confinement materials and configurations of the six rectangular RC prisms. The experiment indicated that the specimens confined by CFRP mesh were beneficial for confinement, avoiding the buckling phenomenon of longitudinal steel rebars occurring in the control specimen. Compared to the control specimen, CFRP-confined specimens exhibited a maximum increase in load-carrying capacity of up to 18%, deformation capacity by 25%, and cumulative energy dissipation by 30%. In addition, an analytical model to simulate the compressive load–strain relationship of confined concrete was developed and compared with experimental results.</p>

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Cyclic Axial Behavior of Rectangular RC Prisms Lightly Confined by CFRP Mesh Simulating Shear Wall Boundary Elements

  • 期刊论文

  • 发表日期：

    2025年5月21日

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  • Huu Hiep Pham,
  • Seung-Hee Kim,
  • Ngoc Hieu Dinh,
  • Si-Hyun Kim,
  • Kyoung-Kyu Choi

摘要

Shear walls are widely used in concrete buildings to resist gravity and lateral loadings. However, these walls are vulnerable to reinforcement corrosion and material aging. In this study, cyclic axial load tests (tension and compression) were conducted on rectangular reinforced concrete (RC) prisms to simulate shear wall boundary elements. The rectangular prisms were lightly confined using carbon fiber-reinforced polymer (CFRP) mesh as the transverse reinforcement material, which was proposed as a corrosion-resistant replacement for traditional steel transverse reinforcement in concrete members. The main test parameters included the confinement materials and configurations of the six rectangular RC prisms. The experiment indicated that the specimens confined by CFRP mesh were beneficial for confinement, avoiding the buckling phenomenon of longitudinal steel rebars occurring in the control specimen. Compared to the control specimen, CFRP-confined specimens exhibited a maximum increase in load-carrying capacity of up to 18%, deformation capacity by 25%, and cumulative energy dissipation by 30%. In addition, an analytical model to simulate the compressive load–strain relationship of confined concrete was developed and compared with experimental results.