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<p>Steel fibres of aspect ratio 50 (50&#xa0;mm length, 1&#xa0;mm diameter), end hooked type were considered. Fibre volume fractions at 1.0, 1.25, 1.5, and 1.75 percent, and concrete of characteristic compressive strength tested at 28&#xa0;days of 20 N/mm<sup>2</sup>, 25 N/mm<sup>2</sup>, and 30 N/mm<sup>2</sup>, were considered and tensile behaviour was studied. Tension tests in the form of Double Punch Test (DPT) was carried out, and the results in the form of stress–strain response were represented. The failure of specimens was along three or four radial directions. Tension tests under slow cyclic loading were affected by random fibre distribution, the effect being relatively less in the case of concrete with high characteristic compressive strength and high fibre volume fractions. The experimental stress–strain response in tension was compared with the response arrived using theoretical equations referred from literature. The behaviour of SFRC under repeated slow cyclic loading in tension have showed the usefulness of steel fibres in improving the behaviour of structural elements. </p>

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Steel fibre-reinforced concrete (SFRC) under repeated slow cyclic loading in tension: experimental and theoretical studies

  • 期刊论文

  • 发表日期：

    2025年5月14日

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  • K. Jayanth,
  • G. S. Suresh

摘要

Steel fibres of aspect ratio 50 (50 mm length, 1 mm diameter), end hooked type were considered. Fibre volume fractions at 1.0, 1.25, 1.5, and 1.75 percent, and concrete of characteristic compressive strength tested at 28 days of 20 N/mm2, 25 N/mm2, and 30 N/mm2, were considered and tensile behaviour was studied. Tension tests in the form of Double Punch Test (DPT) was carried out, and the results in the form of stress–strain response were represented. The failure of specimens was along three or four radial directions. Tension tests under slow cyclic loading were affected by random fibre distribution, the effect being relatively less in the case of concrete with high characteristic compressive strength and high fibre volume fractions. The experimental stress–strain response in tension was compared with the response arrived using theoretical equations referred from literature. The behaviour of SFRC under repeated slow cyclic loading in tension have showed the usefulness of steel fibres in improving the behaviour of structural elements.