Confinement Model for FRP-Confined High-Strength Concrete
This article has been corrected.
VIEW CORRECTIONPublication: Journal of Composites for Construction
Volume 18, Issue 4
Abstract
It is well understood that confining concrete with fiber-reinforced polymer (FRP) composites can significantly enhance its strength and deformability. However, the confinement demand of concrete increases proportionally with its strength, resulting in higher confinement requirements for high-strength concrete (HSC). This paper reports on a study on the axial compressive behavior of FRP-confined HSC. A large experimental test database, which consists of 237 axial compression tests results for FRP-confined HSC, was assembled from the published literature and presented in this paper. This database was augmented with another database of FRP-confined normal-strength concrete (NSC), which consists of 739 test results. The combined database of 1063 test results, which cover specimens with unconfined concrete strengths ranging from 6.2 to 169.7 MPa, was used to investigate and quantify the factors that influence the compressive behavior of FRP-confined HSC. Analysis of the test results reported in the database indicates that the confinement requirement increases significantly with an increase in concrete strength, which adversely affects the observed strength enhancement through confinement. In addition, it was also observed that the hoop rupture strain of the FRP shell decreases as the concrete strength increases. Many existing stress-strain models developed for FRP-confined concrete were assessed by using the HSC database. A close examination of the results of the model assessment led to many important conclusions regarding the strengths and weaknesses of existing stress-strain models. Finally, a novel design-oriented model for FRP-confined concrete is presented that was developed on the basis of the database summarized in the paper. It is shown that the proposed model performs significantly better than any of the existing stress-strain models of FRP-confined concrete in predicting the ultimate conditions of FRP-confined HSC.
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References
Ahmad, S. M., Khaloo, A. R., and Irshaid, A. (1991). “Behaviour of concrete spirally confined by fiberglass filaments.” Mag. Concr. Res., 43(156), 143–148.
Aire, C., Gettu, R., and Casas, J. R. (2001). “Study of the compressive behavior of concrete confined by fiber reinforced composites.” Proc., of the Int. Conf. Composites in Construction, AA Balkema Publishers, Lisse, The Netherlands, 239–243.
Aire, C., Gettu, R., Casas, J. R., Marques, S., and Marques, D. (2010). “Concrete laterally confined with fibre-reinforced polymers (FRP): Experimental study and theoretical model.” Mater. Constr., 60(297), 19–31.
Almusallam, T. H. (2007). “Behavior of normal and high-strength concrete cylinders confined with E-glass/epoxy composite laminates.” Compos. Part B, 38(5–6), 629–639.
Attard, M. M., and Setunge, S. (1996). “Stress-strain relationship of confined and unconfined concrete.” ACI Mater. J., 93(5), 432–442.
Benzaid, R., Chikh, N. E., and Mesbah, H. (2009). “Study of the compressive behavior of short concrete columns confined by fiber reinforced composite.” Arab. J. Sci. Eng., 34(1B), 15–26.
Benzaid, R., Mesbah, H., and Chikh, N. E. (2010). “FRP-confined concrete cylinders: Axial compression experiments and strength model.” J. Reinf. Plast. Compos., 29(16), 2469–2488.
Berthet, J. F., Ferrier, E., and Hamelin, P. (2005). “Compressive behavior of concrete externally confined by composite jackets. Part A: Experimental study.” Constr. Build. Mater., 19(3), 223–232.
Berthet, J. F., Ferrier, E., and Hamelin, P. (2006). “Compressive behavior of concrete externally confined by composite jackets. Part B: Modeling.” Constr. Build. Mater., 20(5), 338–347.
Binici, B. (2005). “An analytical model for stress-strain behavior of confined concrete.” Eng. Struct., 27(7), 1040–1051.
Cheek, J., Formichella, N., Graetz, D., and Varasteh, S. (2011). “The behaviour of ultra high strength concrete in FRP confined concrete systems under axial compression.” Honours Bachelor’s thesis, School of Civil, Environmental and Mining Engineering, Univ. of Adelaide, Adelaide, Australia.
Chikh, N., Gahmous, M., and Benzaid, R. (2012). “Structural performance of high strength concrete columns confined with CFRP sheets.” Proc., of the World Congress on Engineering, London, U.K.
Cui, C., and Sheikh, S. A. (2010a). “Analytical model for circular normal- and high-strength concrete columns confined with FRP.” J. Compos. Constr., 562–572.
Cui, C., and Sheikh, S. A. (2010b). “Experimental study of normal- and high-strength concrete confined with fiber-reinforced polymers.” J. Compos. Constr., 553–561.
De Lorenzis, L., and Tepfers, R. (2003). “Comparative study of models on confinement of concrete cylinders with fiber-reinforced polymer composites.” J. Compos. Constr., 219–237.
Fam, A. Z., and Rizkalla, S. H. (2001). “Confinement model for axially loaded concrete confined by circular fiber-reinforced polymer tubes.” ACI Struct. J., 98(4), 451–461.
Green, M. F. (2007). “FRP repair of concrete structures: Performance in cold regions.” Int. J. Mater. Prod. Technol., 28(1–2), 160–177.
Harmon, T. G., and Slattery, K. T. (1992). “Advanced composite confinement of concrete.” Proc., 1st Int. Conf. on Advanced Composite Materials in Bridges and Structures (ACMBS), Canadian Society for Civil Engineering, West Montréal, QC, Canada, 299–306.
Harries, K. A., and Carey, S. A. (2003). “Shape and ‘gap’ effects on the behavior of variably confined concrete.” Cem. Concr. Res., 33(6), 881–890.
Jiang, T., and Teng, J. G. (2006). “Strengthening of short circular RC columns with FRP jackets: A design proposal.” Proc., 3rd Int. Conf. on FRP Composites in Civil Engineering, International Institute for FRP in Construction, Kingston, ON, Canada.
Jiang, T., and Teng, J. G. (2007). “Analysis-oriented stress-strain models for FRP-confined concrete.” Eng. Struct., 29(11), 2968–2986.
Karbhari, V. M., and Gao, Y. Q. (1997). “Composite jacketed concrete under uniaxial compression—Verification of simple design equations.” J. Mater. Civ. Eng., 185–193.
Lam, L., and Teng, J. G. (2003a). “Design-oriented stress-strain model for FRP-confined concrete.” Constr. Build. Mater., 17(6–7), 471–489.
Lam, L., and Teng, J. G. (2003b). “Hoop rupture strains of FRP jackets in FRP confined concrete.” Proc., 6th Int. Symp. of Fibre-Reinforcement Polymer Reinforcement for Concrete Structures, Dept. of Civil Engineering, National Univ. of Singapore, Singapore, 1, 601–612.
Lam, L., and Teng, J. G. (2004). “Ultimate condition of fiber reinforced polymer-confined concrete.” J. Compos. Constr., 539–548.
Mandal, S., and Fam, A. (2004). “Axial loading tests on FRP confined concrete of different compressive strengths.” Proc., 4th Int. Conf. of Advanced Composite Materials in Bridges and Structures, Canadian Society for Civil Engineering, West Montréal, QC Canada, 20–23.
Mandal, S., Hoskin, A., and Fam, A. (2005). “Influence of concrete strength on confinement effectiveness of fiber-reinforced polymer circular jackets.” ACI Struct. J., 102(3), 383–392.
Matthys, S., Taerwe, L., and Audenaert, K. (1999). “Tests on axially loaded concrete columns confined by fiber reinforced polymer sheet wrapping.” ACI Special Pub., 188, 217–228.
Mirmiran, A., Shahawy, M., Samaan, M., El Echary, H., Mastrapa, J. C., and Pico, O. (1998). “Effect of column parameters on FRP-confined concrete.” J. Compos. Constr., 175–185.
Miyauchi, K., Inoue, S., Kuroda, T., and Kobayashi, A. (1999). “Strengthening effects with carbon fiber sheet for concrete column.” Proc. Japan Concr. Inst., 21(3), 1453–1458.
Owen, L. M. (1998). “Stress-strain behavior of concrete confined by carbon fiber jacketing.” Master’s thesis, Univ. of Washington, Seattle.
Ozbakkaloglu, T. (2013a). “Axial compressive behavior of square and rectangular high-strength concrete-filled FRP tubes.” J. Compos. Constr., 151–161.
Ozbakkaloglu, T. (2013b). “Concrete-filled FRP tubes: Manufacture and testing of new forms designed for improved performance.” J. Compos. Constr., 280–291.
Ozbakkaloglu, T., and Akin, E. (2012). “Behavior of FRP-confined normal- and high-strength concrete under cyclic axial compression.” J. Compos. Constr., 451–463.
Ozbakkaloglu, T., and Lim, J. C. (2013). “Axial compressive behavior of FRP-confined concrete: Experimental test database and a new design-oriented model.” Compos. Part B, (Accepted).
Ozbakkaloglu, T., Lim, J. C., and Vincent, T. (2013). “FRP-confined concrete in circular sections: Review and assessment of stress–strain models.” Eng. Struct., 49, 1068–1088.
Ozbakkaloglu, T., and Oehlers, D. J. (2008a). “Concrete-filled square and rectangular FRP tubes under axial compression.” J. Compos. Constr., 469–477.
Ozbakkaloglu, T., and Oehlers, D. J. (2008b). “Manufacture and testing of a novel FRP tube confinement system.” Eng. Struct., 30(9), 2448–2459.
Ozbakkaloglu, T., and Vincent, T. (2013). “Axial compressive behavior of high-strength concrete-filled FRP tubes.” J. Compos. Constr., 04013037.
Pessiki, S., Harries, K. A., Kestner, J. T., Sause, R., and Ricles, J. M. (2001). “Axial behavior of reinforced concrete columns confined with FRP jackets.” J. Compos. Constr., 237–245.
Rousakis, T. (2001). “Experimental investigation of concrete cylinders confined by carbon FRP sheets under monotonic and cyclic axial compressive load.” Master’s thesis, Dept. of Civil Engineering, Demokritus Univ. of Thrace, Thrace, Greece.
Setunge, S., Attard, M. M., and Darvall, P. L. (1993). “Ultimate strength of confined very high-strength concretes.” ACI Struct. J., 90(6), 632–641.
Shehata, I. A. E. M., Carneiro, L. A. V., and Shehata, L. C. D. (2007). “Strength of confined short concrete columns.” Proc., 8th Int. Symp. on Fiber Reinforced Polymer Reinforcement for Concrete Structures, Dept. of Civil Engineering, Univ. of Patras, Patras, Greece.
Tamuzs, V., Tepfers, R., and Sparnins, E. (2006a). “Behavior of concrete cylinders confined by carbon composite—2. Prediction of strength.” Mech. Compos. Mater., 42(2), 109–118.
Tamuzs, V., Tepfers, R., Zile, E., and Ladnova, O. (2006b). “Behavior of concrete cylinders confined by a carbon composite—3. Deformability and the ultimate axial strain.” Mech. Compos. Mater., 42(4), 303–314.
Tasdemir, M. A., Tasdemir, C., Jefferson, A. D., Lydon, F. D., and Barr, B. I. G. (1998). “Evaluation of strains at peak stresses in concrete: A three-phase composite model approach.” Cem. Concr. Res., 20(4), 301–318.
Teng, J. G., Huang, Y. L., Lam, L., and Ye, L. P. (2007). “Theoretical model for fiber-reinforced polymer-confined concrete.” J. Compos. Constr., 201–210.
Valdmanis, V., De Lorenzis, L., Rousakis, T., and Tepfers, R. (2007). “Behaviour and capacity of CFRP-confined concrete cylinders subjected to monotonic and cyclic axial compressive load.” Struct. Concr., 8(4), 187–200.
Vincent, T., and Ozbakkaloglu, T. (2013a). “Influence of concrete strength and confinement method on axial compressive behavior of FRP confined high- and ultra high- strength concrete.” Compos. Part B, 50, 413–428.
Vincent, T., and Ozbakkaloglu, T. (2013b). “Influence of fiber orientation and specimen end condition on axial compressive behavior of FRP-confined concrete.” Constr. Build. Mater., 47, 814–826.
Wu, H. L., Wang, Y. F., Yu, L., and Li, X. R. (2009). “Experimental and computational studies on high-strength concrete circular columns confined by aramid fiber-reinforced polymer sheets.” J. Compos. Constr., 125–134.
Xiao, Q. G., Teng, J. G., and Yu, T. (2010). “Behavior and modeling of confined high-strength concrete.” J. Compos. Constr., 249–259.
Xiao, Y., and Wu, H. (2000). “Compressive behavior of concrete confined by carbon fiber composite jackets.” J. Mater. Civ. Eng., 139–146.
Youssef, M. N., Feng, M. Q., and Mosallam, A. S. (2007). “Stress-strain model for concrete confined by FRP composites.” Compos. Part B, 38(5–6), 614–628.
Zinno, A., Lignola, G. P., Prota, A., Manfredi, G., and Cosenza, E. (2010). “Influence of free edge stress concentration on effectiveness of FRP confinement.” Compos. Part B, 41(7), 523–532.
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Published In
Journal of Composites for Construction
Volume 18 • Issue 4 • August 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jan 6, 2013
Accepted: Mar 20, 2013
Published online: Mar 22, 2013
Published ahead of production: Apr 1, 2013
Discussion open until: May 31, 2014
Published in print: Aug 1, 2014
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