Parametric Study of the Use of Strain Softening/Hardening FRC for RC Elements Failing in Bending
Publication: Journal of Materials in Civil Engineering
Volume 24, Issue 3
Abstract
Using a design-oriented model recently developed for prediction of the moment-curvature relationship of a cross section of beams made by strain-softening or strain-hardening fiber reinforced concrete (FRC) and that can also include a certain percentage of longitudinal steel bars, a parametric study is carried out to evidence the effect of relevant characteristics of the post-cracking behavior of these materials in the moment-curvature and force-deflection responses of this type of structural elements. The study also analyzes the influence of the reinforcement ratio of longitudinal steel bars, , in order to show that for a certain content of fibers the benefits of fiber reinforcement, mainly at serviceability limit state conditions, decrease with the increase of . Adopting the formulation of the CEB-FIB final draft Model Code, the moment-crack width relationship of FRC beams reinforced with steel bars are obtained and the predictive performance of this approach is assessed by comparing analytical and experimental results.
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Acknowledgments
This work is part of the research project QREN number 3456, PONTALUMIS-development of a prototype of a pedestrian bridge in GFRP-ECC concept, involving the company, ALTO-Perfis Pultrudidos, Lda., the ISISE/University of Minho, and the ICIST/Technical University of Lisbon. The third author wishes to acknowledge the support provided by this project, while the first author wishes to acknowledge the financial support obtained from the project UNSPECIFIEDPTDC/ECM/73099/2006.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 24 • Issue 3 • March 2012
Pages: 259 - 274
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Jul 8, 2010
Accepted: Aug 2, 2011
Published online: Feb 15, 2012
Published in print: Mar 1, 2012
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