RT info:eu-repo/semantics/article
T1 Computed tomography scanning of the internal microstructure, crack mechanisms, and structural behavior of fiber-reinforced concrete under static and cyclic bending tests
A1 Vicente Cabrera, Miguel Ángel
A1 Mínguez Algarra, Jesús
A1 González Cabrera, Dorys Carmen
K1 Fatigue
K1 High strength concrete
K1 Fiber-reinforced concrete
K1 Residual tensile strength
K1 CT-Scan technology
K1 Materiales de construcción
K1 Building materials
K1 Estructuras (Construcción)
K1 Structural engineering
K1 Resistencia de materiales
K1 Strength of materials
AB 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.
PB Elsevier
SN 0142-1123
YR 2019
FD 2019-04
LK http://hdl.handle.net/10259/10083
UL http://hdl.handle.net/10259/10083
LA eng
NO The authors are grateful for financial support from the Ministerio de Economía y Competitividad, BIA2015-68678-C2-R, Spain.
DS Repositorio Institucional de la Universidad de Burgos
RD 31-ene-2025