Analysis-Oriented Stress-Strain Model for Concrete under Combined FRP-Steel Confinement
Publication: Journal of Composites for Construction
Volume 19, Issue 5
Abstract
Fiber reinforced polymer (FRP) jacketing of reinforced concrete (RC) columns is now a widely accepted strengthening/retrofit technique. The extensive existing research conducted on concrete in FRP-confined RC columns has led to a large number of stress-strain models, but most of these models are applicable only to FRP-confined RC columns with limited transverse steel reinforcement (i.e., steel hoops or spirals). In many RC columns such as those designed following modern design standards, the transverse steel reinforcement may provide significant confinement which needs to be accounted for in design. This paper presents an analysis-oriented stress-strain model for concrete in such columns where the concrete is under combined confinement from the FRP jacket and the transverse steel reinforcement (i.e., FRP-steel-confined concrete). Two alternative versions of the proposed model are proposed to cater for different considerations. Both versions of the proposed model are shown to provide accurate predictions of existing test results and to be superior to the existing models of the same type.
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Acknowledgments
The authors are grateful for the financial support received from the Research Grants Council of the Hong Kong Special Administrative Region (Project Nos. PolyU 5285/10E and PolyU 5273/11E).
References
ACI (American Concrete Institute). (2008). “Building code requirements for structural concrete (ACI 318-08) and commentary.”, Detroit.
Binici, B. (2005). “An analytical model for stress-strain behavior of confined concrete.” Eng. Struct., 27(7), 1040–1051.
Braga, F., Gigliotti, R., and Laterza, M. (2006). “Analytical stress-strain relationship for concrete confined by steel stirrups and/or FRP jackets.” J. Struct. Eng., 1402–1416.
Carey, S. A., and Harries, K. A. (2005). “Axial behavior and modeling of confined small-, medium-, and large-scale circular sections with carbon fiber-reinforced polymer jackets.” ACI Struct. J., 102(4), 596–604.
Chastre, C., and Silva, M. A. (2010). “Monotonic axial behavior and modelling of RC circular columns confined with CFRP.” Eng. Struct., 32(8), 2268–2277.
CSA. (2004). “Design of concrete structures.” Canadian Standards Association, Rexdale, ON, Canada.
De Luca, A., Nardone, F., Matta, F., Nanni, A., Lignola, G. P., and Prota, A. (2010). “Structural evaluation of full-scale FRP-confined reinforced concrete columns.” J. Compos. Constr., 112–123.
Demers, M., and Neale, K. (1999). “Confinement of reinforced concrete columns with fibre-reinforced composite sheets—An experimental study.” Can. J. Civ. Eng., 26(2), 226–241.
Eid, R., and Paultre, P. (2007). “Plasticity-based model for circular concrete columns confined with fibre-composite sheets.” Eng. Struct., 29(12), 3301–3311.
Eid, R., and Paultre, P. (2008). “Analytical model for FRP-confined circular reinforced concrete columns.” J. Compos. Constr., 541–552.
Eid, R., Roy, N., and Paultre, P. (2009). “Normal- and high-strength concrete circular elements wrapped with FRP composites.” J. Compos. Constr., 113–124.
Elsanadedy, H. M. (2002). “Seismic performance and analysis of ductile composite-jacketed reinforced concrete bridge columns.” Ph.D. dissertation, Univ. of California, Irvine, CA.
Esfahani, M. R., and Kianoush, M. R. (2004). “Axial compressive strength of reinforced concrete columns wrapped with fiber reinforced polymers (FRP).” Int. J. Eng., 18, 73–83.
Eurocode 2. (2004). “Eurocode 2: Design of concrete structures: Part 1-1: General rules and rules for buildings.” U.K.
GB-50608. (2010). Technical code for infrastructure application of FRP composites, China Planning Press, Beijing.
Harajli, M. H. (2006). “Axial stress-strain relationship for FRP confined circular and rectangular concrete columns.” Cem. Concr. Compos., 28(10), 938–948.
Harries, K. A., and Kharel, G. (2002). “Behavior and modeling of concrete subject to variable confining pressure.” ACI Mater. J., 99(2), 180–189.
Hollaway, L. C., and Teng, J. G. (2008). Strengthening and rehabilitation of civil infrastructures using fibre-reinforced polymer (FRP) composites, Woodhead, Cambridge, U.K.
Hu, H., and Seracino, R. (2013). “Analytical model for FRP-and-steel-confined circular concrete columns in compression.” J. Compos. Constr., A4013012.
Ilki, A., Peker, O., Karamuk, E., Demir, C., and Kumbasar, N. (2008). “FRP retrofit of low and medium strength circular and rectangular reinforced concrete columns.” J. Mater. Civ. Eng., 169–188.
Jiang, T., and Teng, J. G. (2007). “Analysis-oriented stress-strain models for FRP-confined concrete.” Eng. Struct., 29(11), 2968–2986.
Kestner, J. T., Harries, K. A., Pessiki, S. P., Sause, R., and Ricles, J. M. (1997). “Rehabilitation of reinforced concrete columns using fiber reinforced polymer composite jackets.”, Lehigh Univ., Bethlehem, PA.
Kupfer, H., Hilsdorf, H. K., and Rusch, H. (1969). “Behavior of concrete under biaxial stresses.” ACI J. Proc., 66(8), 656–666.
Lam, L., and Teng, J. G. (2003). “Design-oriented stress-strain model for FRP-confined concrete.” Constr. Build. Mater., 17(6), 471–489.
Lee, J. Y., Yi, C. K., Jeong, H. S., Kim, S. W., and Kim, J. K. (2010). “Compressive response of concrete confined with steel spirals and FRP composites.” J. Compos. Mater., 44(4), 481–504.
Li, Y. F., Fang, T. S., and Chern, C. C. (2003). “A constitutive model for concrete cylinder confined by steel reinforcement and carbon fibre sheet.” Proc., Pacific Conf. on Earthquake Engineering, Univ. of Canterbury, Christchurch, New Zealand.
Lin, G., Teng, J. G., and Lam, L. (2012). “Numerical simulation of FRP-jacketed RC columns under cyclic loading: Modeling of the strain penetration effect.” Proc., 1st Int. Conf. on Performance-Based and Life-Cycle Structural Engineering (PLSE2012), Faculty of Construction and Environment & Research Institute for Sustainable Urban Development, Hong Kong Polytechnic Univ., Hong Kong, China.
Lin, H. J., and Liao, C. I. (2004). “Compressive strength of reinforced concrete column confined by composite material.” Compos. Struct., 65(2), 239–250.
Mander, J. B., Priestley, M. J., and Park, R. (1988). “Theoretical stress-strain model for confined concrete.” J. Struct. Eng., 1804–1826.
Matthys, S., Toutanji, H., Audenaert, K., and Taerwe, L. (2005). “Axial load behavior of large-scale columns confined with fiber-reinforced polymer composites.” ACI Struct. J., 102(2), 258–267.
Megalooikonomou, K. G., Monti, G., and Santini, S. (2012). “Constitutive model for fiber-reinforced polymer-and tie-confined concrete.” ACI Struct. J., 109(4), 569–578.
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.
Park, R., and Paulay, T. (1975). Reinforced concrete structures, Wiley, New York.
Pellegrino, C., and Modena, C. (2010). “Analytical model for FRP confinement of concrete columns with and without internal steel reinforcement.” J. Compos. Constr., 693–705.
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.
Rocca, S. (2007). “Experimental and analytical evaluation of FRP-confined large size reinforced concrete columns.” Ph.D. thesis, Univ. of Missouri-Rolla, Rolla, MO.
Sheikh, S. A., and Uzumeri, S. M. (1982). “Analytical model for concrete confinement in tied columns.” J. Struct. Div., 108(12), 2703–2722.
Teng, J. G., Chen, J. F., Smith, S. T., and Lam, L. (2002). FRP-strengthened RC structures, Wiley, West Sussex, U.K.
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.
Teng, J. G., Jiang, T., Lam, L., and Luo, Y. Z. (2009). “Refinement of a design-oriented stress-strain model for FRP-confined concrete.” J. Compos. Constr., 269–278.
Teng, J. G., and Lam, L. (2004). “Behavior and modeling of fiber reinforced polymer-confined concrete.” J. Struct. Eng., 1713–1723.
Teng, J. G., Lu, J. Y., Lam, L., and Xiao, Q. G. (2010). “Numerical simulation of FRP-jacketed RC columns subjected to cyclic loading.” Proc., 5th Int. Conf. on FRP Composites in Civil Engineering, Springer, Berlin, 820–823.
Wang, D. Y. (2012). “Experimental and analytical investigation of seismic performance of nonductile RC frames retrofitted with FRP.” Ph.D. dissertation, School of Civil and Engineering, Harbin Institute of Technology, Harbin, China.
Wang, Z. Y., Wang, D. Y., Smith, S. T., and Lu, D. G. (2012). “Experimental testing and analytical modeling of CFRP-confined large circular RC columns subjected to cyclic axial compression.” Eng. Struct., 40, 64–74.
Xiao, Q. G., Teng, J. G., and Yu, T. (2010). “Behavior and modeling of confined high-strength concrete.” J. Compos. Constr., 249–259.
Zhang, Y. X. (2012). “Behavior of large-size FRP-jacketed circular and rectangular reinforced concrete columns.” M.Phil. thesis, Hong Kong Polytechnic Univ., Hong Kong, China.
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© 2014 American Society of Civil Engineers.
History
Received: Aug 7, 2014
Accepted: Nov 17, 2014
Published online: Dec 22, 2014
Discussion open until: May 22, 2015
Published in print: Oct 1, 2015
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