Influence of Slenderness on Stress-Strain Behavior of Concrete-Filled FRP Tubes: Experimental Study
Publication: Journal of Composites for Construction
Volume 19, Issue 1
Abstract
Concrete-filled fiber reinforced polymer (FRP) tubes (CFFTs) have received significant research attention over the last two decades, with recent experimental studies identifying significant benefits of CFFTs filled with high-strength concretes (HSC). However, many test parameters of high-strength CFFTs, such as specimen slenderness, remain experimentally limited. This paper presents an experimental investigation on the axial compressive behavior of 33 monotonically loaded circular normal-strength and high-strength CFFTs (NSCFFTs and HSCFFTs). The influence of specimen slenderness is investigated on test specimens with height-to-diameter ratios () of 1, 2, 3, and 5. The CFFT specimens were instrumented with numerous lateral strain gauges to examine the development of hoop strains along the specimen height and around specimen perimeter. The experimentally recorded stress-strain relationships are presented graphically and the ultimate axial stresses and strains, and FRP tube hoop strains at rupture are tabulated. The results indicate that specimens with a height-to-diameter ratio () of 1 outperform specimens with a ratio of 2 to 5, with significantly increased strength and strain enhancements. The influence of slenderness on specimens with a ratio between 2 and 5 was found to be significant in regards to axial strain enhancement, with a decrease observed as specimen slenderness increased. Conversely, the influence of slenderness on axial strength enhancement of specimens with a ratio between 2 and 5 was found to be negligible. The strain results indicate that hoop rupture strains along the height of CFFTs become more uniform for specimens with higher amounts of confinement. On the other hand, the variation of hoop strains around the perimeter of CFFTs was not observed to be significantly influenced by slenderness, concrete strength or amount of confinement.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The authors would like to thank the Honour’s students Messrs. Lin, Ou, Long, and Tsang who performed the experimental procedures presented in this paper. The experimental work presented in this paper is part of an ongoing experimental program at University of Adelaide on FRP-concrete composite columns.
References
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.
ASTM. (2008). “Standard test method for tensile properties of polymer matrix composites materials.” D3039-M-08, West Conshohocken, PA.
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.
Chastre, C., and Silva, M. (2010). “Monotonic axial behavior and modeling of RC circular columns confined with CFRP.” Eng. Struct., 32(8), 2268–2277.
Cui, C., and Sheikh, A. (2010). “Experimental study of normal- and high-strength concrete confined with fiber-reinforced polymers.” J. Compos. Constr., 553–561.
Eid, R., Roy, N., and Paultre, M. (2009). “Normal- and high-strength concrete circular elements wrapped with FRP composites.” J. Compos. Constr., 113–124.
Fam, A., Schnerch, D., and Rizkalla, S. (2005). “Rectangular filament-wound GFRP tubes filled with concrete under flexural and axial loading: Experimental investigation.” J. Compos. Constr., 25–33.
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.
Fitzwilliam, J., and Bisby, L. (2010). “Slenderness effects on circular CFRP confined reinforced concrete columns.” J. Compos. Constr., 280–288.
Hadi, M. N. S., and Li, J. (2004). “External reinforcement of high strength concrete columns.” Compos. Struct., 65(3), 279–287.
Hong, W. K., and Kim, H. C. (2004). “Behavior of concrete columns confined by carbon composite tubes.” Can. J. Civ. Eng., 31(2), 178–188.
Idris, Y., and Ozbakkaloglu, T. (2013). “Seismic behavior of high-strength concrete-filled FRP tube columns.” J. Compos. Constr., 04013013.
Ilki, A., and Kumbasar, N. (2003). “Compressive behaviour of carbon fibre composite jacketed concrete with circular and non-circular cross-sections.” Earthquake Eng., 7(3), 381–406.
Issa, M., Alrousan, R., and Issa, M. (2009). “Experimental and parametric study of circular short columns confined with CFRP composites.” J. Compos. Constr., 135–147.
Lam, L., and Teng, J. G. (2003). “Design-oriented stress-strain model for FRP-confined concrete.” Constr. Build. Mater., 17(6–7), 471–489.
Lam, L., and Teng, J. G. (2004). “Ultimate condition of FRP-confined concrete.” J. Compos. Constr., 539–548.
Lim, J. C., and Ozbakkaloglu, T. (2013). “Confinement model for FRP-confined high-strength concrete.” J. Compos. Constr., 04013058.
Maaddawy, T., Sayed, M., and Abdel-Magid, B. (2010). “The effects of cross-sectional shape and loading condition on performance of reinforced concrete members confined with carbon fiber-reinforced polymers.” Mater. Des., 31(5), 2330–2341.
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.
Mirmiran, A., Shahawy, M., and Beitleman, T. (2001). “Slenderness limit for hybrid FRP-concrete columns.” J. Compos. Constr., 26–34.
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.
Mohamed, H., and Masmoudi, R. (2010). “Axial load capacity of concrete-filled FRP tube columns: Experimental versus predictions.” J. Compos. Constr., 231–243.
Ozbakkaloglu, T. (2013a). “Axial compressive behavior of square and rectangular high-strength concrete-filled FRP tubes.” J. Compos. Constr., 151–161.
Ozbakkaloglu, T. (2013b). “Behavior of square and rectangular ultra high-strength concrete-filled FRP tubes under axial compression.” Compos. Part B, 54, 97–111.
Ozbakkaloglu, T. (2013c). “Compressive behavior of concrete-filled FRP tube columns: Assessment of critical column parameters.” Eng. Struct., 51, 151–161.
Ozbakkaloglu, T. (2013d). “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, 55, 607–634.
Ozbakkaloglu, T., Lim, J. C., and Vincent, T. (2013). “FRP-confined concrete in circular sections: Review and assessment of the 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 Saatcioglu, M. (2006). “Seismic behavior of high-strength concrete columns confined by fiber reinforced polymer tubes.” J. Compos. Constr., 538–549.
Ozbakkaloglu, T., and Saatcioglu, M. (2007). “Seismic performance of square high-strength concrete columns in stay-in-place formwork.” J. Struct. Eng., 44–56.
Ozbakkaloglu, T., and Vincent, T. (2014). “Axial compressive behavior of circular high-strength concrete-filled FRP tubes.” J. Compos. Constr., 04013037.
Pan, J. L., Xu, T., and Hu, Z. J. (2007). “Experimental investigation of load carrying capacity of the slender reinforced concrete columns wrapped with FRP.” Constr. Build. Mater., 21(11), 1991–1996.
Park, J. H., Jo, B. W., Soon, S. J., and Park, S. K. (2011). “Experimental investigation on the structural behavior of concrete filled FRP tubes with/without steel re-bar.” KSCE J. Civ. Eng., 15(2), 337–345.
Pessiki, S., Harries, K. A., Kestner, J., Sause, R., and Ricles, J. M. (2001). “The axial behavior of concrete confined with fiber reinforced composite jackets.” J. Compos. Constr., 237–245.
Popovics, S. (1973). “A numerical approach to the complete stress-strain curves for concrete.” Cem. Concr. Res., 3(5), 583–599.
Rajasekaran, A., Raghunath, P., and Suguna, K. (2008). “Effect of confinement on the axial performance of fibre reinforced polymer wrapped RC column.” Eng. Appl. Sci., 1(2), 110–117.
Rodrigues, C. C., and Silva, M. G. (2001). “Experimental investigation of CFRP reinforced concrete columns under uniaxial cyclic compression.” Proc., 5th Int. Symp. On Fiber Reinforced Polymer Reinforcement for Concrete Structures, Thomas Telford, London.
Rousakis, T. (2001). “Experimental investigation of concrete cylinders confined by carbon FRP sheets under monotonic and cyclic axial compressive load.” Research Rep., Chalmers Univ. of Technology, Göteborg, Sweden.
Rousakis, T., and Tepfers, R. (2001). Experimental investigation of concrete cylinders confined by carbon FRP sheets, under monotonic and cyclic axial compressive load, Vol. 44, Chalmers Univ. of Technology, Div. of Building Technology, Göteborg, Sweden, 87.
Saatcioglu, M., Ozbakkaloglu, T., and Elnabelsy, G. (2008). “Seismic behavior and design of reinforced concrete columns confined with FRP stay-in-place formwork.” ACI special publication, SP257-09, 257, 149–170.
Seible, F., Burgueno, R., Abdallah, M. G., and Nuismer, R. (1996). “Development of advanced composite carbon shell systems for concrete columns in seismic zones.” 11th World Conf. on Earthquake Engineering, Elsevier Science, Oxford, U.K.
Shao, Y., and Mirmiran, A. (2005). “Experimental investigation of cyclic behavior of concrete-filled fiber reinforced polymer tubes.” J. Compos. Constr., 263–273.
Silva, M. A. G., and Rodrigues, C. C. (2006). “Size and relative stiffness effects on compressive failure of concrete columns wrapped with glass FRP.” J. Mater. Civ. Eng., 334–342.
Suter, R., and Pinzelli, R. (2001). “Confinement of concrete columns with FRP sheets.” Proc., 5th Symp. on Fibre Reinforced Plastic Reinforcement for Concrete Structures, Thomas Telford, London.
Tamuzs, V., et al. (2006). “Behavior of concrete cylinders confined by carbon-composite tapes and prestressed yarns I: Experimental data.” Mech. Compos. Mater., 42(1), 13–32.
Teng, J. G., and Lam, L. (2002). “Compressive behavior of carbon fiber reinforced polymer-confined concrete in elliptical columns.” J. Struct. Eng., 1535–1543.
Thériault, M., Neale, K. W., and Claude, S. (2004). “Fiber reinforced polymer-confined circular concrete columns: Investigation of size and slenderness effects.” J. Compos. Constr., 323–331.
Toutanji, H., and Balaguru, P. (1998). “Durability characteristics of concrete columns wrapped with FRP tow sheets.” J. Mater. Civ. Eng., 52–57.
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., Wang, Y., Yu, L., and Li, X. (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., Teng, J. G., and Yu, T. (2010). “Behavior and modeling of confined high-strength concrete.” J. Compos. Constr., 249–259.
Yamakawa, T., Zhong, P., and Ohama, A. (2003). “Seismic performance of aramid fiber square tubed concrete columns with metallic and/or non-metallic reinforcement.” Reinf. Plast. Compos., 22(13), 1221–1237.
Yazici, V., and Hadi, M. (2009). “Behaviour of FRP wrapped circular concrete columns.” Proc., 9th Int. Symp. on Fiber Reinforced Polymer Reinforcement for Concrete Structures, Univ. of Adelaide, Adelaide, Australia.
Zhu, Z., Ahmad, I., and Mirmiran, A. (2006). “Seismic performance of concrete-filled FRP tube columns for bridge substructures.” J. Bridge Eng., 359–370.
Zohrevand, P., and Mirmiran, A. (2011). “Behavior of ultra high-performance concrete confined by fiber-reinforced polymers.” J. Mater. Civ. Eng., 1727–1734.
Information & Authors
Information
Published In
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jan 2, 2014
Accepted: Mar 20, 2014
Published online: May 28, 2014
Discussion open until: Oct 28, 2014
Published in print: Feb 1, 2015
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.