Mechanical and Structural Characterization of New Carbon FRP Stirrups for Concrete Members
Publication: Journal of Composites for Construction
Volume 11, Issue 4
Abstract
This paper describes an experimental program conducted to develop new carbon fiber reinforced polymer (CFRP) stirrups as shear reinforcement for concrete members. The structural behavior of the CFRP stirrups was examined. To simulate the performance mechanism of stirrups in concrete beams, the CFRP stirrup was embedded in two concrete blocks and tested in tension by pushing the concrete blocks away from each other. A total of 12 specimens were constructed and tested to failure. The test variables were the tail length of the stirrup beyond the bent portion, the stirrup anchorage, the bar diameter, and the embedment length. In addition, two full-scale concrete beams reinforced with CFRP stirrups as shear reinforcement were constructed and tested to failure. Test results of the concrete blocks indicated that the strength capacity at the bend of the newly developed CFRP stirrups was adequate and fulfilled the design requirements of different codes and design guides. Further, the tail length was found to be not less than six times the bar diameter to develop the stirrup capacity. The performance of the stirrups in the beam tests was appropriate until reaching the failure of the beams in flexure.
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Acknowledgments
The writers acknowledge the financial support from the Ministry of Transportation of Quebec (Research Contract No. 2520-02-BD02 entitled “Conception de poutres de pont en béton précontraint renforcées avec des étriers en matériaux composites,” the National Sciences and Engineering Research Council of Canada (NSERC), the FRP manufacturer Pultrall Inc. (Thetford Mines, Que., Canada), and the Network of Centres of Excellence ISIS-Canada, (Winnipeg, Man., Canada). Thanks to François Ntacorigira and Simon Sindayigaya, technicians at the Department of Civil Engineering, Université de Sherbrooke, for their help in the fabrication and testing of the slabs.
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Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 11 • Issue 4 • August 2007
Pages: 352 - 362
Copyright
© 2007 ASCE.
History
Received: Mar 8, 2006
Accepted: Jun 15, 2006
Published online: Aug 1, 2007
Published in print: Aug 2007
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