Title:
A Model to Predict the Crack Width of FRC Members Reinforced with Longitudinal Bars
Author(s):
J.A.O. Barros, M. Taheri, H. Salehian
Publication:
Symposium Paper
Volume:
319
Issue:
Appears on pages(s):
2.1-2.16
Keywords:
Crack width, fiber reinforced concrete (FRC), flexural elements, reinforced FRC elements
DOI:
10.14359/51700851
Date:
6/1/2017
Abstract:
A hybrid analytical/numerical approach for the evaluation of the moment-rotation behavior of a cross
section of fiber reinforced concrete (FRC) elements flexurally reinforced with longitudinal bars is briefly
described. This model is applied to FRC elements failing in bending, and considers the constitutive laws of the
constituent materials, where a special focus on the simulation of the post-cracking tensile behavior of FRC was
given, as well as the bond behavior between flexural reinforcement and surrounding FRC. The predictive
performance of the proposed model is assessed by simulating experimentally tested FRC beams of different
geometry, fiber content, and longitudinal reinforcement ratio. Furthermore, the predictive performance of RILEM
TC 162 TDF and fib Model Code 2010 design guidelines for the prediction of the crack width in FRC elements
failing in bending is also discussed in the present work. The potentiality of the developed model is then explored
for the assessment of the influence of toughness classes of FRC and the bond stiffness between flexural
reinforcement and surrounding FRC on the moment-crack opening response of FRC flexural members.