RT info:eu-repo/semantics/article
T1 Size effect on the flexural fatigue behavior of high-strength plain and fiber-reinforced concrete
A1 Mena Alonso, Álvaro
A1 González Cabrera, Dorys Carmen
A1 Mínguez Algarra, Jesús
A1 Vicente Cabrera, Miguel Ángel
K1 Size effect
K1 Flexural fatigue
K1 Fiber-reinforced concrete
K1 Cracking in concrete
K1 Secondary crack opening rate
K1 Ingeniería civil
K1 Civil engineering
K1 Resistencia de materiales
K1 Strength of materials
K1 Construcción
K1 Construction
AB 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.
PB Elsevier
SN 0950-0618
YR 2024
FD 2024-01-12
LK http://hdl.handle.net/10259/9290
UL http://hdl.handle.net/10259/9290
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, Innovación y Universidades (grant no. FPU19/02685).
DS Repositorio Institucional de la Universidad de Burgos
RD 24-nov-2024