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<p>To investigate cyclic behavior of steel fiber-reinforced high-strength concrete (SFRHSC) shear walls with high-strength steel bars, three shear wall specimens were tested under constant axial load and reversed cyclic lateral displacements. The parameter is the height of SFRHSC region of the shear walls. The experiment results are presented and seismic behavior of SFRHSC shear walls, e.g. ductility, is analyzed. The results show that due to the existence of steel fibers, the integrity of compressive concrete in plastic hinge region for SFRHSC specimens was maintained even when a large drift occurred. Therefore, a 24% improvement of ductility was observed in the SFRHSC specimen when compared with that of the HSC specimen. In addition, the SFRHSC can effectively restrain the maximum tensile strain of longitudinal reinforcement and promote stress redistribution of bottom section. Besides, the specimen with a SFRHSC region height of 500&#xa0;mm and the specimen casted completely with SFRHSC exhibited similar seismic behavior. Though lateral capacity at yield and ultimate states can be well predicted with most of the error controlled in 10%, further explorations for an engineering model of SFRHSC cracked walls are needed for corresponding code. </p>

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Cyclic Behavior of Steel Fiber-Reinforced High-Strength Concrete Shear Walls with High-Strength Steel Bars

  • 期刊论文

  • 发表日期：

    2025年5月5日

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  • Jianwei Zhang,
  • Ruxing Cai,
  • Weiheng Liu,
  • Chaofeng Peng

摘要

To investigate cyclic behavior of steel fiber-reinforced high-strength concrete (SFRHSC) shear walls with high-strength steel bars, three shear wall specimens were tested under constant axial load and reversed cyclic lateral displacements. The parameter is the height of SFRHSC region of the shear walls. The experiment results are presented and seismic behavior of SFRHSC shear walls, e.g. ductility, is analyzed. The results show that due to the existence of steel fibers, the integrity of compressive concrete in plastic hinge region for SFRHSC specimens was maintained even when a large drift occurred. Therefore, a 24% improvement of ductility was observed in the SFRHSC specimen when compared with that of the HSC specimen. In addition, the SFRHSC can effectively restrain the maximum tensile strain of longitudinal reinforcement and promote stress redistribution of bottom section. Besides, the specimen with a SFRHSC region height of 500 mm and the specimen casted completely with SFRHSC exhibited similar seismic behavior. Though lateral capacity at yield and ultimate states can be well predicted with most of the error controlled in 10%, further explorations for an engineering model of SFRHSC cracked walls are needed for corresponding code.