Analytical Bond Model for GFRP Bars to Steel Fiber Reinforced Self-Compacting Concrete
Publication: Journal of Composites for Construction
Volume 17, Issue 6
Abstract
The objective of this study is to present a computational algorithm to analytically evaluate the bond behavior between glass fiber reinforced polymer (GFRP) bar and steel fiber reinforced self-compacting concrete (SFRSCC). The type of information to be derived is appropriate to study the flexural behavior of SFRSCC beams reinforced with GFRP bars in terms of serviceability limit states requirements; in fact, the bond between bars and surrounding concrete influences significantly the crack width and crack spacing. The proposed bond model was established by calibrating the parameters of a multilinear bond-slip constitutive law using the experimental results of pullout bending tests carried out by the authors, taking into account the experimental pullout force versus slip at loaded and free ends. According to the comparison between theoretical and experimental pullout force-slip, an acceptable accuracy of the model was observed. Additionally, by considering the proposed bond-slip relationship, a parametric study was carried out to evaluate the influence of the involved bond-slip law’s parameters on the maximum force transferred to the surrounding concrete. Finally, the development length of two GFRP bars utilized in the experiments (deformed and smooth bars) was determined by means of the proposed model, and it was compared with the values recommended by codes.
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Acknowledgments
This work is supported by FEDER funds through the Operational Programme for Competitiveness Factors – COMPETE and National Funds through FCT—Portuguese Foundation for Science and Technology under the project PTDC/ECM/105700/2008—“DURCOST—Innovation in reinforcing systems for sustainable pre-fabricated structures of higher durability and enhanced structural performance.”
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Information & Authors
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Published In
Journal of Composites for Construction
Volume 17 • Issue 6 • December 2013
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Nov 10, 2012
Accepted: May 17, 2013
Published online: May 20, 2013
Published in print: Dec 1, 2013
Discussion open until: Feb 18, 2014
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