Shear Friction Capacity of Concrete with External Carbon FRP Strips
Publication: Journal of Structural Engineering
Volume 131, Issue 12
Abstract
Carbon Fiber Reinforced Polymer (CFRP) composite strips were used to strengthen concrete externally at a known failure plane to resist shear friction. The uncracked push-off specimens were externally reinforced with CFRP composites using a reinforcement ratio ranging from 0.3 to 1.2%. The shear friction capacity of plain concrete without steel reinforcement was increased 1.32–3.25 times, and was found to be a function of the shear-to-normal stress ratio. The shear friction strength ranged from to for the reinforcement ratios studied. Tests with various wrapping schemes showed no evidence that additional shear friction capacity could be developed for a four-sided scheme compared to a two-sided scheme. The shear friction strength of the initially uncracked connections was found using experimental results, which combine the shear friction contribution of concrete and that of concrete–CFRP interaction, similar to current practice for internal steel reinforcement.
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Acknowledgments
The writers acknowledge the financial support of the National Science Foundation under Grant No. NSFCMS 0099792. The writers acknowledge the assistance of Professor Lawrence D. Reaveley and several graduate students at the University of Utah; they also acknowledge Sika Corporation and Eagle Precast Inc. for in-kind support.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 131 • Issue 12 • December 2005
Pages: 1911 - 1919
Copyright
© 2005 ASCE.
History
Received: Aug 5, 2003
Accepted: Apr 29, 2005
Published online: Dec 1, 2005
Published in print: Dec 2005
Notes
Note. Associate Editor: Dat Duthinh
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