Evaluation of Prestressed Concrete Girders Strengthened with Carbon Fiber Reinforced Polymer Sheets
Publication: Journal of Bridge Engineering
Volume 9, Issue 2
Abstract
This paper details the use of carbon fiber reinforced polymer (CFRP) sheets to repair and strengthen prestressed concrete bridge girders in flexure and shear. Three specimens that were removed from an overloaded bridge (Bridge No. 56) in Graham County, Kansas were tested. Two of the specimens were repaired and strengthened, and all three were tested to failure to determine flexural capacity. Test results showed that two layers of longitudinal CFRP sheets increased the flexural capacity of the strengthened specimens by 20% compared to an unstrengthened control specimen. Shear capacity was also evaluated on both ends of each specimen. Two different cases were evaluated in shear. One case allowed shear cracks to propagate inside the transfer length of the prestressing strand, allowing a bond failure to occur. The second case forced the shear cracks to remain outside of the transfer length, thereby preventing a bond failure. The test results show that transverse CFRP sheets increased the shear capacity of the specimens tested by as much as 28%, but did not prevent bond failures.
Get full access to this article
View all available purchase options and get full access to this article.
References
Alkhradaji, T., Nanni, A., and Mayo, R. (2000). “Upgrading Missouri transportation infrastructure: Solid reinforced-concrete decks strengthened with fiber-reinforced polymer systems.” Transportation Research Record 1740, Transportation Research Board, National Academy Press, Washington, D.C., 157–163.
American Association of State Highway and Transportation Officials (AASHTO). (1996). Standard specifications for highway Bridges, 16th Ed., American Association of State Highway Transportation Officials, Washington, D.C.
American Concrete Institute (ACI). (2002). “Building code requirements for structural concrete.” ACI 318-02 and Commentary ACI 318R-02, American Concrete Institute, Farmington Mills, Mich.
Arduini, M., and Nanni, A.(1997). “Behavior of precracked reinforced concrete beams strengthened with carbon fiber reinforced polymer sheets.” J. Compos. Constr., 1(2), 63–70.
Dussek, I. (1987). “Strengthening of bridge beams by means of epoxy-resin-bonded external reinforcement.” Transportation Research Record 785, Transportation Research Board, Washington, D.C., 21–24.
Fanning, J. P., and Kelly, O.(2001). “Ultimate response of reinforced concrete beams strengthened with carbon fiber reinforced polymer plates.” J. Compos. Constr., 5(2), 122–127.
M-Brace. (1998). M-Brace composite strengthening system-engineering design guidelines, 2nd Ed., Master Builders Technologies, Cleveland.
Nanni, A. (1995). “Concrete repair with externally bonded carbon fiber reinforced polymer reinforcement: Examples from Japan.” ACI Concrete Int., June, 22–26.
Nilson, A. H. (1987). Design of prestressed concrete, 2nd Ed., Wiley, New York.
Park, R., and Paulay, T. (1975). Reinforced concrete structure, Wiley, New York.
Precast/Prestressed Concrete Institute. (1999). PCI design Handbook, 5th Ed., PCI, Chicago.
Russell, B., and Burns, N. (1993). “Design guidelines for transfer, development, and debonding of large diameter seven wire strands in pretensioned concrete girders.” Texas Department of Transportation in cooperation with Federal Highway Administration, Research Rep. No. 1210-5F, January.
Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 9 • Issue 2 • March 2004
Pages: 185 - 192
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Jan 10, 2002
Accepted: Dec 13, 2002
Published online: Feb 19, 2004
Published in print: Mar 2004
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.