RT info:eu-repo/semantics/article
T1 Influence of specimen size and fiber content on fatigue flexural strength of high-performance fiber-reinforced concrete
A1 Mena Alonso, Álvaro
A1 Vicente Cabrera, Miguel Ángel
A1 Mínguez Algarra, Jesús
A1 González Cabrera, Dorys Carmen
K1 Flexural fatigue
K1 Micro-computed tomography
K1 Fiber distribution
K1 Orientation factor
K1 Cyclic creep curve
K1 Materiales de construcción
K1 Building materials
K1 Ingeniería civil
K1 Civil engineering
AB This paper studies the impact of specimen size and fiber content on the flexural fatigue response of high-performance fiber-reinforced concrete (HPFRC). For this purpose, six series of prismatic specimens were fabricated, considering two sizes (75 × 75 × 300 mm and 150 × 150 × 600 mm) and three fiber contents (0.3%, 0.6% and 1%). Twelve specimens from each series were tested in flexural fatigue under the same relative stress levels. It was sought to explain the variations in fatigue response through the observation of the mesostructure. In particular, correlations were established between the fiber distribution and the fatigue strength of all series. The results reveal that the parameter that most influences the ultimate static bending strength (σult) is the fiber volume in the central region of the specimens (Vfib), with the orientation having a much lower weight. In contrast, the opposite is true for cyclic tests. Since the fatigue stress levels were calculated in relation to σult of each series, the influence of Vfib is negligible. In this case, a clear correlation between fiber orientation with the longitudinal axis and fatigue strength is observed. Specifically, the orientation factor ηX accurately predicts both the characteristic fatigue life and the rate at which damage progresses in the main macrocrack.
PB Elsevier
SN 0141-0296
YR 2024
FD 2024-10
LK http://hdl.handle.net/10259/9964
UL http://hdl.handle.net/10259/9964
LA eng
NO 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, Innovacion ´ y Universidades (grant no. FPU19/02685).
DS Repositorio Institucional de la Universidad de Burgos
RD 21-ene-2025