2026-04-19T15:12:21Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/100832025-01-30T01:05:39Zcom_10259_4809com_10259_5086com_10259_2604col_10259_4810

00925njm 22002777a 4500 dc Vicente Cabrera, Miguel Ángel author Mínguez Algarra, Jesús author González Cabrera, Dorys Carmen author 2019-04 Fiber-reinforced concrete (FRC), its behavior, and the effects of cyclic loading on its internal microstructure are studied in this paper. Particular attention is given to the evolution of the residual tensile strength of the fiber-reinforced concretes and damage following cyclic flexural loading. A numerical equation is also proposed to estimate the residual tensile strength, depending on crack width, damage, fiber content, and fiber orientation. A total of 65 prismatic specimens, in two different series, were tested: one designed with 1% of fibers by volume and the other with 2% of fibers. The specimens were not notched, but had previously been subjected to pre-cracking, which has a similar effect to notching, although the specimens become more vulnerable to fatigue. Both fiber content and fiber orientation were measured using computed tomography (CT) scans. The results showed that the damage provoked a progressive reduction in the residual tensile strength. The differences in the behavior of both series were mainly related to their fiber content and, to a lesser extent, to their fiber orientation. 0142-1123 http://hdl.handle.net/10259/10083 10.1016/j.ijfatigue.2018.11.023 Fatigue High strength concrete Fiber-reinforced concrete Residual tensile strength CT-Scan technology Computed tomography scanning of the internal microstructure, crack mechanisms, and structural behavior of fiber-reinforced concrete under static and cyclic bending tests