CFRP Prestressed High-Strength Concrete Prisms Subjected to Direct Tension
Publication: Journal of Composites for Construction
Volume 12, Issue 6
Abstract
This paper describes the behavior of carbon fiber-reinforced polymer (CFRP) prestressed high-strength concrete prisms under direct tension. Seven prestressed concrete prisms with different levels of prestressing were cast and tested. Prisms were in cross section and their lengths varied between 1,400 and . Concrete compressive strength was as high as . Tension stiffening, crack width, and crack spacing in prisms were investigated. Concrete properties, such as the stress–strain relationship under direct tension and bond strength, were also determined. Test results revealed that tension stiffening in CFRP prestressed high-strength concrete is significant when higher concrete strength and higher prestressing level are applied. Tension stiffening factors are proposed based on the postcracking behavior of concrete. Experimental results also showed that increasing the prestressing level increases the amount of tension stiffening and reduces the number of cracks, which delays their appearance. However, cracks widened at a faster rate in the prisms with higher prestressing levels. Experimental results were compared with Comite Euro-International du Beton and American Concrete Institute proposed equations. Modifications were suggested for the above-mentioned equations to account for use of CFRP bars in prestressed sections.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The writers would like to acknowledge NSERC for financial support, the technical staff of the heavy structures laboratory at the University of Manitoba, and LAFARGE Canada.
References
Aiello, M. A, Leone, M., and Ombres, L. (2004). “Cracking analysis of fibre-reinforced polymer reinforced concrete tension members.” Proc. Inst. Civ. Eng., Struct. Build., 157(1), 53–62.
American Concrete Institute (ACI). (2006). “Guide for the design and construction of concrete reinforced with FRP bars.” ACI 440.1R-06, Farmington Hills, Mich.
Belarbi, A., and Hsu, T. T. C. (1994). “Constitutive laws of concrete in tension and reinforcing bars stiffened by concrete.” ACI Struct. J., 91(4), 465–474.
Berg, R. G., and Ost, B. W. (1992). “Engineering properties of commercially available high-strength concrete.” PCA R&D, Serial No. 1914.
Bischoff, P. H. (1983). “Response of prestressed concrete tension members.” MSc thesis, McGill Univ., Montreal.
Bischoff, P. H., and Paixao, R. (2004). “Tension stiffening and cracking of concrete reinforced with glass fiber reinforced polymer (GFRP) bars.” Can. J. Civ. Eng., 31, 579–588.
Canadian Standard Association (CSA). (2002). “Design and construction of building components with fiber-reinforced polymers.” CSA-S806, Mississauga, Ont., Canada.
Canadian Standard Association (CSA). (2004). “Design of concrete structures.” CSA A23.3-04 Mississauga, Ont., Canada.
Carreira, D. J., and Chu, K. H. (1986). “Stress–strain relationship for reinforced concrete in tension.” ACI Struct. J., 83(3), 21–28.
Collins, M. P., and Mitchell, D. (1997). Prestressed concrete structures, Response Publications, Toronto and Montreal, Canada.
Comite Euro-International du Beton (CEB-FIP). (1978). CEB-FIP model code for concrete structures (MC-78), 3rd Ed., Paris.
Comite Euro-International du Beton (CEB-FIP). (1993). CEB-FIP model code for concrete structures (MC-90), Thomas Telford Services LTD, London.
Damjanic, F., and Owen, D. R. (1984). “Practical consideration for modeling of post-cracking behavior for finite element analysis of reinforced concrete structures.” Proc., Int. Conf. on Computer-Aided Analysis and Design of Concrete Structures, Pineridge Press, Swansea, Wales, U.K.
Davoudi, S., Svecova, D., and Gheorghiu, C. (2008). “CFRP prestressed prisms as reinforcement in continuous concrete T-beams.” ACI Struct. J., 105(3), 368–374.
European Committee for Standardization. (1991). “Design of concrete structures, Part 1-1: General rules and rules of buildings.” Eurocode 2, European Prestandard, DD ENV 1992-1-1, CEN, Brussels, Belgium.
Falkner, H. (1969). “Cracking of reinforced concrete members due to residual and restraining stresses caused by temperature.” Deutscher Ausschub fur Stahbetonbauteilen, 208.
Fields, F., and Bischoff, P. H. (2004). “Tension stiffening and cracking of high strength reinforced concrete tension members.” ACI Struct. J., 101(4), 447–456.
Leonhardt, F. (1977). “Crack control in concrete structures.” IABSE Surveys No. S-4/77, International Association for Bridge and Structural Engineering, Zurich, Switzerland.
Timoshenko, S. P., and Goodier, J. N. (1969). Theory of elasticity. 3rd Ed., Mc-Graw Hill, New York.
Vecchio, F. J., and Collins, M. P. (1986). “Modified compression field theory for reinforced concrete elements subjected to shear.” ACI Struct. J., 83(2), 219–231.
Information & Authors
Information
Published In
Copyright
© 2008 ASCE.
History
Received: May 24, 2007
Accepted: Sep 24, 2007
Published online: Dec 1, 2008
Published in print: Dec 2008
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.