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<p>Steel fiber reinforced concrete (SFRC) is a popular material for structural buildings because of its ductility, bonding effect, durability, and stability at elevated temperatures. When exposed to elevated temperatures, concrete undergoes elemental changes that can lead to deterioration. This study observed the flexural behavior of concrete prisms with various steel fiber volume proportion of 0%, 0.5%, 1%, and 1.5% exposed to elevated temperatures (28&#xa0;°C, 100&#xa0;°C, 300&#xa0;°C, 500&#xa0;°C, and 700&#xa0;°C) for time period of 1&#xa0;h. Finite element modeling was used to predict the deflection of plain concrete and SFRC prisms under these conditions. Experimental and analytical results were compared, and optimization was achieved using the response surface method (RSM). A quadratic polynomial equation was developed using RSM to anticipate the flexural strength and deflection of plain and SFRC concrete at various temperatures and steel fiber volume fractions.</p>

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Numerical and experimental investigation on flexural performance of SFRC at various elevated temperatures

  • 期刊论文

  • 发表日期：

    2025年1月3日

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  • Anita J. Jessie,
  • K. K. Gaayathri,
  • Chithambar Ganesh

摘要

Steel fiber reinforced concrete (SFRC) is a popular material for structural buildings because of its ductility, bonding effect, durability, and stability at elevated temperatures. When exposed to elevated temperatures, concrete undergoes elemental changes that can lead to deterioration. This study observed the flexural behavior of concrete prisms with various steel fiber volume proportion of 0%, 0.5%, 1%, and 1.5% exposed to elevated temperatures (28 °C, 100 °C, 300 °C, 500 °C, and 700 °C) for time period of 1 h. Finite element modeling was used to predict the deflection of plain concrete and SFRC prisms under these conditions. Experimental and analytical results were compared, and optimization was achieved using the response surface method (RSM). A quadratic polynomial equation was developed using RSM to anticipate the flexural strength and deflection of plain and SFRC concrete at various temperatures and steel fiber volume fractions.