RT info:eu-repo/semantics/article
T1 Role of local fiber content and orientation on the scatter of flexural fatigue behavior in steel fiber-reinforced concrete
A1 Mena Alonso, Álvaro
A1 Aragón Torre, Ángel
A1 Vicente Cabrera, Miguel Ángel
A1 González Cabrera, Dorys Carmen
A1 Mínguez Algarra, Jesús
K1 Steel-fiber-reinforced concrete
K1 Fatigue life
K1 Fiber orientation
K1 Microcomputed tomography
K1 Statistical variability
K1 Materiales de construcción
K1 Building materials
K1 Ingeniería civil
K1 Civil engineering
K1 Hormigón
K1 Concrete
AB This study investigates the scatter in fatigue life (N) of fiber-reinforced concrete (FRC) as a function of variability in local fiber orientation and content. To this end, three FRC series were produced with fiber contents of 0.3 %, 0.6 %, and 1.0 %. All specimens were scanned using micro-computed tomography (microCT) and subsequently tested under flexural fatigue. The results show a clear correlation between fiber orientation and fatigue strength: within each series, specimens with a higher orientation factor ηX (which quantifies the degree of fiber alignment along the longitudinal axis) withstood a greater number of cycles to failure. A strong relationship was also identified between the number of fibers crossing the central section (Nfib,c) and fatigue life. Moreover, ηX and Nfib,c were found not to be independent variables, as a higher number of fibers is associated with better orientation. Finally, a model is proposed to estimate fatigue life as a function of ηX and fiber dosage, which shows adequate accuracy in predicting the scatter in N for sets of identical specimens.
PB Elsevier
SN 2214-5095
YR 2025
FD 2025-12
LK https://hdl.handle.net/10259/11158
UL https://hdl.handle.net/10259/11158
LA eng
NO The authors gratefully acknowledge the financial support provided by the Spanish Ministerio de Ciencia, Innovaci´ on y Universidades through project PID2023–147971OB-C33, and by the Junta de Castilla y Le´on (Regional Government) through project BU004G24. Open access funding provided by UNIVERSIDAD DE BURGOS.
DS Repositorio Institucional de la Universidad de Burgos
RD 17-abr-2026