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Open AccessArticle

Probabilistic Flexural Fatigue in Plain and Fiber-Reinforced Concrete

Grupo de Estructuras, ETS de Ingeniería, Universidad de Sevilla, Camino de los Descubrimientos, s/n, 41092 Sevilla, Spain
ETSI de Caminos, Canales y Puertos, Universidad de Castilla-La Mancha, Avenida Camilo José Cela, s/n, 13071 Ciudad Real, Spain
Author to whom correspondence should be addressed.
Materials 2017, 10(7), 767;
Received: 10 June 2017 / Revised: 29 June 2017 / Accepted: 3 July 2017 / Published: 7 July 2017
The objective of this work is two-fold. First, we attempt to fit the experimental data on the flexural fatigue of plain and fiber-reinforced concrete with a probabilistic model (Saucedo, Yu, Medeiros, Zhang and Ruiz, Int. J. Fatigue, 2013, 48, 308–318). This model was validated for compressive fatigue at various loading frequencies, but not for flexural fatigue. Since the model is probabilistic, it is not necessarily related to the specific mechanism of fatigue damage, but rather generically explains the fatigue distribution in concrete (plain or reinforced with fibers) for damage under compression, tension or flexion. In this work, more than 100 series of flexural fatigue tests in the literature are fit with excellent results. Since the distribution of monotonic tests was not available in the majority of cases, a two-step procedure is established to estimate the model parameters based solely on fatigue tests. The coefficient of regression was more than 0.90 except for particular cases where not all tests were strictly performed under the same loading conditions, which confirms the applicability of the model to flexural fatigue data analysis. Moreover, the model parameters are closely related to fatigue performance, which demonstrates the predictive capacity of the model. For instance, the scale parameter is related to flexural strength, which improves with the addition of fibers. Similarly, fiber increases the scattering of fatigue life, which is reflected by the decreasing shape parameter. View Full-Text
Keywords: probabilistic fatigue model; flexural fatigue; fiber-reinforced concrete probabilistic fatigue model; flexural fatigue; fiber-reinforced concrete
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Ríos, J.D.; Cifuentes, H.; Yu, R.C.; Ruiz, G. Probabilistic Flexural Fatigue in Plain and Fiber-Reinforced Concrete. Materials 2017, 10, 767.

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