Behavior of FRP Strengthened Reinforced Concrete Beams under Torsion
Publication: Journal of Composites for Construction
Volume 11, Issue 2
Abstract
The use of fiber reinforced plastics (FRPs) for flexural and shear strengthening of reinforced concrete beams has been scrutinized to a considerable depth by researchers worldwide. The area of torsional strengthening however has not been as popular. This paper presents the results of an experimental investigation together with a numerical study on reinforced concrete beams subjected to torsion that are strengthened with FRP wraps in a variety of configurations. In the experimental study, the increase in the ultimate torque for different strengthening configurations, failure mechanisms, crack patterns, and ductility levels are monitored and presented. Experimental results show that FRP wraps can increase the ultimate torque of fully wrapped beams considerably in addition to enhancing the ductility. The experimental results upgrade the weak archival data on torsional strengthening by application of FRP. The numerical section reports on analyses performed by the ANSYS finite element program. Predictions are compared with experimental findings and are in reasonable agreement.
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Acknowledgments
In the experimental part, MBT supported the project by providing the materials at the cost price. Ahmad Khuzaini Sani and Cher Ng, undergraduate students of UQ were involved in the preparation and testing of the beams as part of their undergraduate theses. All Workshop and Structures lab staffs are thanked, in particular Robert Stephan, Shane Walker, and Paul Pezzopane who helped the students during setup and testing.
References
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 11 • Issue 2 • April 2007
Pages: 192 - 200
Copyright
© 2007 ASCE.
History
Received: Sep 21, 2005
Accepted: Jun 15, 2006
Published online: Apr 1, 2007
Published in print: Apr 2007
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