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<p>Steel fibre reinforced concrete (SFRC) offers better performance for pavements and industrial floors. However, its adoption in pavement is still limited due to lack of experimentally validated fatigue-based design methods. This study experimentally investigates the fatigue response of pre-cracked SFRC slabs at four stress levels under load control. Slabs were pre-cracked to 95% post-peak load drop, and cyclic loading continued until one million cycles, 10&#xa0;mm deflection, or failure of the specimen whichever occurs first. Results show significant enhancement in both load-carrying capacity and rotation capacity with increased fibre dosage (0.3% to 0.4% <i>V</i><sub><i>f</i></sub>). Theoretical fatigue response, estimated using yield line analysis and material models, aligned conservatively with experimental findings. A generalized fatigue model (GenFRC), integrated into a mechanistic-empirical design approach (MEFRC), provided optimized thickness for SFRC pavements. The study validates fatigue-based design for SFRC pavements and supports broader adoption through experimentally backed models.</p>

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Design of steel fibre reinforced concrete pavements with experimentally validated fatigue models

  • 期刊论文

  • 发表日期：

    2025年12月25日

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  • Ajeesh Koorikkattil,
  • Sunitha K. Nayar,
  • Veena Venudharan

摘要

Steel fibre reinforced concrete (SFRC) offers better performance for pavements and industrial floors. However, its adoption in pavement is still limited due to lack of experimentally validated fatigue-based design methods. This study experimentally investigates the fatigue response of pre-cracked SFRC slabs at four stress levels under load control. Slabs were pre-cracked to 95% post-peak load drop, and cyclic loading continued until one million cycles, 10 mm deflection, or failure of the specimen whichever occurs first. Results show significant enhancement in both load-carrying capacity and rotation capacity with increased fibre dosage (0.3% to 0.4% Vf). Theoretical fatigue response, estimated using yield line analysis and material models, aligned conservatively with experimental findings. A generalized fatigue model (GenFRC), integrated into a mechanistic-empirical design approach (MEFRC), provided optimized thickness for SFRC pavements. The study validates fatigue-based design for SFRC pavements and supports broader adoption through experimentally backed models.