Fatigue strength of steel fibre reinforced concrete in flexure |
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| Affiliation: | 1. Department of Civil Engineering, Regional Engineering College, Jalandhar 144011, India;2. Department of Civil Engineering, University of Roorkee, Roorkee 247667, India;1. ETSI de Caminos, Canales y Puertos, Universidad de Castilla-La Mancha (UCLM), Avenida Camilo José Cela S/N, 13071 Ciudad Real, Spain;2. Department of Civil Engineering, Pontifical Catholic University of Rio de Janeiro (PUC-Rio), 22451-900 Rio de Janeiro, Brazil;1. CSIR-Structural Engineering Research Centre, Chennai 600113, India;2. School of Engineering, Cardiff University, Cardiff CF24 3AA, Wales, UK;3. GVP College of Engineering, Visakhapatnam, India;4. Dhanalakshmi College of Engineering, Chennai 601301, India;1. Department of Civil and Structural Engineering, The University of Sheffield, Sir Frederick Mappin Building, Mappin Street, Sheffield S1 3JD, UK;2. Department of Civil Engineering, King Saud University, P. O. Box 800, Riyadh 11421, Saudi Arabia;3. School of Engineering, The University of Warwick, Library Road, Coventry CV4 7AL, UK;4. Department of Civil Engineering and Geomatics, Cyprus University of Technology, Achilleos 1 Building, Saripolou 2-8, P.O.Box 50329, 3603 Limassol, CY, Cyprus;1. Università della Campania “Luigi Vanvitelli”, Department of Engineering, Via Roma 19, Aversa CE, 81031, Italy;2. Università di Bergamo, Department of Engineering and Applied Sciences, Italy;1. Department of Structural Engineering, College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China;2. Department of Civil Engineering, Tsinghua University, Beijing 100084, China;3. Department of Civil & Environmental Engineering, University of Houston, Houston, TX 77204-4006, United States;4. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China |
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| Abstract: | The paper presents a study on the fatigue strength of steel fibre reinforced concrete (SFRC). An experimental programme was conducted to obtain the fatigue-lives of SFRC at various stress levels and stress ratios. Sixty seven SFRC beam specimens of size 500×100×100 mm were tested under four-point flexural fatigue loading. Fifty four static flexural tests were also conducted to determine the static flexural strength of SFRC prior to fatigue testing. The specimens incorporated 1.5% volume fraction of corrugated steel fibres of size 0.6×2.0×30 mm. Concept of equivalent fatigue-life, reported for plain concrete in literature, is applied to SFRC to incorporate the effects of stress level S, stress ratio R and survival probability LR into the fatigue equation. The results indicate that the statistical distribution of equivalent fatigue-life of SFRC is in agreement with the two-parameter Weibull distribution. The coefficients of the fatigue equation have been determined corresponding to different survival probabilities so as to predict the flexural fatigue strength of SFRC for the desired level of survival probability. |
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