Effects of Gradually Anchored Prestressed CFRP Strips Bonded on Prestressed Concrete Beams
Publication: Journal of Composites for Construction
Volume 12, Issue 1
Abstract
Four prestressed concrete beams were constructed and tested to investigate the effectiveness of flexural post-strengthening with prestressed carbon fiber-reinforced polymer (CFRP) strips. One of the beams served as a reference beam, another was bonded with an unstressed CFRP strip, and the remaining two specimens were strengthened with prestressed CFRP strips at two prestressing levels. The gradient method was used for the anchorage of the prestressed CFRP strips. Experimental and analytical calculations are compared with the test results. Further, different failure modes are explained. On the basis of this investigation, recommendations for the use of prestressed CFRP strips anchored with the gradient method are given.
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Acknowledgments
The work presented here is part of the Ph.D. thesis of the first writer and collaborative research between the Faculty of Civil Engineering, University of Tehran, and Empa, Swiss Federal Laboratories for Materials Testing and Research. The writers wish to thank Empa for its financial support of the tests, which were performed by the first writer at the Structural Engineering Research Laboratory of Empa.
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Information
Published In
Journal of Composites for Construction
Volume 12 • Issue 1 • February 2008
Pages: 25 - 34
Copyright
© 2008 ASCE.
History
Received: Jul 24, 2006
Accepted: Jan 16, 2007
Published online: Feb 1, 2008
Published in print: Feb 2008
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