2026-04-17T23:16:36Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/86652025-01-20T07:29:33Zcom_10259_4809com_10259_5086com_10259_2604com_10259_3969col_10259_4810col_10259_3970

00925njm 22002777a 4500 dc González Cabrera, Dorys Carmen author Mena Alonso, Álvaro author Mínguez Algarra, Jesús author Martínez Martínez, José Antonio author Vicente Cabrera, Miguel Ángel author 2024-01 This paper shows the relationship, in steel fiber-reinforced concrete, between fiber orientation and fatigue response through the combined use of computed tomography (CT), digital image processing (DIP) software and wedge splitting test (WST). The WST cubes were extracted from conventional 150 × 150× 600 concrete prisms and a groove and notch were carved on different faces in such a way that in half of the test specimens the fibers are oriented mostly perpendicular to the breaking surface and, in the other half, the fibers are mostly oriented parallel to the breaking surface. Fiber orientation was obtained using a CT device and DIP software from a miniprism extracted from the previously mentioned concrete prisms. The results show that there is a strong correlation between the crack-sewing fiber orientation on the one hand and fatigue life and crack opening rate per cycle on the other hand. Cubes with a higher percentage of fibers perpendicular to the crack surface (i.e., with a higher efficiency index) show a longer fatigue life and a lower crack opening rate per cycle, while cubes with a lower efficiency index show a shorter fatigue life and a higher crack opening rate per cycle. 1976-0485 http://hdl.handle.net/10259/8665 10.1186/s40069-023-00639-8 2234-1315 Fiber-reinforced concrete CT-scan technology Crack petterns Wedge splitting test Fatigue creep curve Effect of Fiber Orientation on the Fatigue Behavior of Steel Fiber-Reinforced Concrete Specimens by Performing Wedge Splitting Tests and Computed Tomography Scanning