2026-04-18T02:25:38Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/92902024-06-20T00:05:19Zcom_10259_4809com_10259_5086com_10259_2604col_10259_4810

Mena Alonso, Álvaro González Cabrera, Dorys Carmen Mínguez Algarra, Jesús Vicente Cabrera, Miguel Ángel 2024-06-19T11:49:52Z 2024-06-19T11:49:52Z 2024-01-12 0950-0618 http://hdl.handle.net/10259/9290 10.1016/j.conbuildmat.2023.134424 This paper studies the size effect on flexural fatigue in concrete. In particular, the main objective is to evaluate how the addition and content of steel fibers affect this size effect. For this purpose, four types of concrete have been produced: plain and reinforced concrete with fiber contents of 0.3%, 0.6% and 1%. Two prismatic specimen sizes were considered: 75×75×300 mm, named S, and 150×150×600 mm, named L. All specimens were subjected to 3-point bending fatigue at the same relative stress levels up to failure. The results reveal very interesting conclusions. The fibers mitigate the size effect on fatigue life, going from a difference of three orders of magnitude in PC, to practically zero in SFRC. Furthermore, it is observed that fibers do not necessarily improve fatigue life; in fact, the trend changes depending on specimen size. Finally, it is shown that the secondary crack opening rate dCMOD/dn has a good correlation with fatigue life, explaining the dispersion of N in general and the size effect in particular. The authors are grateful for the financial support of the Spanish Ministerio de Economía y Competitividad (grant no. PID2019–110928RB-C32) and the Spanish Ministerio de Ciencia, Innovación y Universidades (grant no. FPU19/02685). application/pdf eng Elsevier Construction and Building Materials. 2024, V. 411, 134424 https://doi.org/10.1016/j.conbuildmat.2023.134424 Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Size effect Flexural fatigue Fiber-reinforced concrete Cracking in concrete Secondary crack opening rate Ingeniería civil Resistencia de materiales Construcción Civil engineering Strength of materials Construction Size effect on the flexural fatigue behavior of high-strength plain and fiber-reinforced concrete info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Construction and Building Materials 411