Numerical Modeling of Shear Strengthened Reinforced Concrete Beams Using Different Systems
Publication: Journal of Composites for Construction
Volume 18, Issue 1
Abstract
This research aims at creating finite-element models for fiber-reinforced polymer (FRP) shear strengthened concrete beams. It is inspired by the fact that the determination of the structural behavior of shear strengthened beams requires advanced numerical methods of which results are substantiated by credible experimental findings. The models are developed here to assess the shear and interfacial types of behavior of beams strengthened using one of three different schemes, namely, externally bonded (EB), mechanically fastened (MF), and hybrid EB/MF FRP schemes. The interfacial behavior between the EB, MF, and hybrid EB/MF FRP and the concrete is accounted for using interface elements for both vertical and inclined FRP strips. A user-defined subroutine for the microplane constitutive law for the concrete material is incorporated in the model. Results are presented in terms of the ultimate load-carrying capacities, load-deflection relationships, and interfacial stress/slip distributions. Numerical results are validated against available experimental data and show reasonable agreement. Models for hypothetical cases of MF FRP strengthened beams are created to enrich the discussion on the interfacial bearing stress distributions.
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Acknowledgments
The authors would like to express their sincere appreciation to the Research Affairs at the United Arab Emirates University for the financial support of this project under fund Grant No. 03_34_07_11/11. The authors would also like to thank the research group at the University of Sherbrooke, Canada, led by Professor K.W. Neale, for providing access to computational resources of the group.
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Published In
Journal of Composites for Construction
Volume 18 • Issue 1 • February 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Mar 11, 2013
Accepted: Jun 25, 2013
Published online: Jun 27, 2013
Published in print: Feb 1, 2014
Discussion open until: Mar 18, 2014
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