Mechanically Fastened FRP-Strengthened Two-Way Concrete Slabs with and without Cutouts
Publication: Journal of Composites for Construction
Volume 13, Issue 3
Abstract
The feasibility of strengthening concrete slabs in flexure, with and without cutouts, using the mechanically fastened (MF) FRP technique is investigated. Two series of large-scale reinforced concrete slabs are tested. The first series is comprised of five slabs without a cutout, and measuring ; the second series consists of four slabs of the same dimensions with a central cutout measuring . The mechanically fastened system is found to be a valid alternative to the externally bonded system resulting in a rapid, economic, and effective strengthening technique for two-way concrete slabs. The increases in ultimate capacities of the MF FRP-strengthened slabs range between 30 and 70% over those of the unstrengthened specimens. In addition, finite-element modeling of MF FRP-strengthened slabs is introduced in this study. The interfacial behavior between the MF FRPs and the concrete substrate is accounted for by using appropriate interfacial models. Very good agreement is obtained between the test results and the numerical predictions.
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Acknowledgments
This research was funded by the Natural Sciences and Engineering Research Council of Canada (NSERC), and the Canadian Network of Centres of Excellence on Intelligent Sensing for Innovative Structures (ISIS Canada). Sincere thanks are expressed to the technical staff of the structural engineering laboratory of the University of Sherbrooke for their assistance in this project. A special acknowledgment is extended to Strongwell Inc. for providing the SAFSTRIP® FRPs for this research. KWN is Canada Research Chair in Advanced Engineered Material Systems, and the support of this program is gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 13 • Issue 3 • June 2009
Pages: 198 - 207
Copyright
© 2009 ASCE.
History
Received: Jun 5, 2008
Accepted: Oct 31, 2008
Published online: Mar 3, 2009
Published in print: Jun 2009
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