Debonding- and Fatigue-Related Strain Limits for Externally Bonded FRP
Publication: Journal of Composites for Construction
Volume 10, Issue 1
Abstract
Available guidance for mitigating debonding failure of externally bonded fiber reinforced polymer (FRP) composites applied to concrete is evaluated based on data obtained from large- and full-scale experimental programs. Current recommendations are inadequate to effectively mitigate intermediate crack-induced debonding in flexural members. An improved, although still simple to apply, equation for determining limiting FRP material properties to mitigate debonding is presented and evaluated. Additionally, the effect of fatigue loading on the debonding behavior of externally bonded FRP is not adequately addressed in practice. In the limited data presented, a degradation of bond behavior is observed even under fatigue loading conditions amounting to an FRP stress range of no more than 4% of the FRP capacity.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This research was supported through grants from the United States Department of Transportation and Federal Highway Administration administered by the South Carolina Department of Transportation, and the National Science Foundation (Grant No. CMS 9908293).
References
ACI Committee 440. (2002). “Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures.” ACI 440.2R-02, Farmington Hills, Mich.
Aidoo, J. (2004). “Flexural retrofit of reinforced concrete bridge girders using three CFRP systems.” PhD dissertation, Dept. of Civil and Environmental Engineering, Univ. of South Carolina, Columbia, S.C.
Aidoo, J., Harries, K. A., and Petrou, M. F. (2004). “Fatigue behavior of CFRP strengthened reinforced concrete bridge girders.” J. Compos. Constr., 8(6), 501–509.
JSCE. (2001). “Recommendations for the upgrading of concrete structures with use of continuous fiber sheets.” Concrete engineering, Series 41, Japanese Society of Civil Engineers, Tokyo.
Quattlebaum, J., Harries, K. A., and Petrou, M. F. (2005). “Comparison of three CFRP flexural retrofit systems under monotonic and fatigue loads.” J. Bridge Eng., 10(6), 731–740.
Sebastian, M. W. (2001). “Significance of midspan debonding failure in FRP-plated concrete beams.” J. Struct. Eng., 127(7), 792–798.
Smith, S. T., and Teng, J. G. (2001). “FRP-srengthened RC beams. I: Review of debonding strength models.” Eng. Struct., 24(4), 385–395.
Teng, J. G., Smith, S. T., Yao, J., and Chen, J. F. (2001). “Intermediate crack induced debonding in RC beams and slabs.” Constr. Build. Mater., 17(6–7), 447–462.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 10 • Issue 1 • February 2006
Pages: 87 - 90
Copyright
© 2006 ASCE.
History
Received: Dec 21, 2004
Accepted: Jun 27, 2005
Published online: Feb 1, 2006
Published in print: Feb 2006
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.