Fatigue Analysis of Plain and Fiber-Reinforced Self-Consolidating Concrete

This paper investigates the flexural fatigue performance of self-consolidating concrete (SCC) and self-consolidating fiber-reinforced concrete (SCFRC) containing round corrugated steel fibers with a size of 1 x 30 mm (0.04 x 1.18 in.) in different 0.5, 1.0, and 1.5% volume fractions. Approximately 250 flexural fatigue tests and 195 complementary static flexural tests were executed on beam specimens with a size of 100 x 100 x 500 nun (3:94 x 3.94 x 19.7 in.) under four-point flexural loading. The fatigue-life data show that the probabilistic distribution of fatigue life of SCC/SCFRC at a given stress level can approximately be modeled by the two-parameter Weibull distribution. Three different methods were used to obtain the Weibull parameters. A single-log fatigue equation was used to analyze the flexural fatigue performance of SCC/SCFRC with a 10% probability of failure. The results show significantly improved fatigue performance of SCFRC with enhanced sensitivity of fatigue lives to the change of applied stress. Theoretic fatigue lives for SCC/SCFRC were estimated that exhibit an increase to a different extent.