Simplified time‐dependent crack width prediction for fiber reinforced concrete flexural members

Abstract

One of the main areas where it is generally accepted that fibers play a significant contribution in construction practice is in the control of cracking. The primary objective of the fibers is to traverse cracks after they nucleate. The fibers provide some post‐cracking resistance to the otherwise brittle concrete. Much of the research contained in the literature on the cracking behavior of fiber reinforced concrete (FRC) members has focused on instantaneous load scenarios, without much consideration for the long‐term behavior (i.e., for members which are subjected to a sustained service moment). This is mirrored in design standards where limited guidance is provided to engineers to predict and assess the long‐term serviceability performance of FRC members. This paper presents a simplified model, which may be suitable for design, that can reliably predict the cracking behavior, over time, of FRC members subjected to a sustained in‐service flexural load. Predictions of the proposed model are compared to both instantaneous and long‐term data available in the literature. Satisfactory correlation is observed.

Shrinkage cracking in restrained FRC members containing conventional reinforcement

“…This has been explained in depth by the authors in previous studies which have examined the tension stiffening effect in fiber reinforced concrete (FRC) and reinforced concrete (RC) tension chords and flexural members, and by others. [15][16][17][18][19][20][21][22][23][24][25] Several analytical models have been proposed in the literature for shrinkage cracking in restrained RC members. [26][27][28][29][30] However, to the author's knowledge, no models exist for FRC members, with or without conventional reinforcement.…”

High‐temperature effect on mechanical properties of fiber reinforced concretes including waste tire rubber

“…Due to fact that to enhance the mechanical behavior of rubberized cementbased materials, in this study three different types of fibers (mostly preferred fiber types in construction sector) are used. Although there are numerous studies on rubberized [11][12][13][14] and fiber reinforced concrete [15][16][17][18][19] in literature, this study investigates mechanical properties such as compressive strength, flexural tensile strength, pullout resistance, heat effect and stress-strain behaviors of fiber reinforced rubberized concretes. Synergetic effect of CR-carbon steel fiber (CSF), CR-propylene fiber, and CRforta ferro fiber (FFF) is investigated.…”

Time‐dependent elongation and cracking behavior of fiber reinforced concrete tension chords

“…Tension chord model for fiber reinforced concrete: Average crack spacing F I G U R E 5 Tension chord model for fiber reinforced concrete tension ties under sustained load: (a) maximum crack spacing; (b) minimum crack spacing (instantaneous distribution shown in gray for reference)22 …”