Factors Affecting the Ultimate Condition of FRP-Wrapped Concrete Columns
Publication: Journal of Composites for Construction
Volume 17, Issue 1
Abstract
Fiber reinforced polymer (FRP)-wrapped circular concrete columns under axial compression usually fail as a result of FRP rupture in the hoop direction. The average measured hoop strain in the FRP jacket at failure of such columns, i.e., the apparent FRP rupture strain, is typically considerably lower than the ultimate tensile strain obtained from tensile tests of flat coupons. A large scatter also exists in the measured rupture strains over the surface of an FRP-wrapped column at ultimate failure. No rational model based on sound theories is currently available to explicitly consider the reduction of the apparent FRP rupture strain in design. This paper discusses the possible failure modes of FRP-wrapped concrete columns and the factors that may play a role in the initiation of failure. Further research needs and the possible consequences for the optimized design of FRP-wrapped concrete columns are discussed.
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Acknowledgments
The authors would like to acknowledge the support from the Scottish Funding Council for the Joint Research Institute with the Heriot-Watt University, which is a part of the Edinburgh Research Partnership in Engineering and Mathematics (ERPem), and from the UKIERI (UK India Education and Research Initiative) project (IND/CONT/07-08/E/133).
References
Ahmad, S. H., Khaloo, A. R., and Irshaid, A. (1991). “Behavior of concrete spirally confined by fibreglass filaments.” Mag. Concr. Res., 43(156), 143–148.
Ahmad, S. H., and Shah, S. P. (1982). “Stress-strain curves of concrete confined by spiral reinforcement.” J. Am. Concr. Inst., 79(6), 484–490.
American Concrete Institute (ACI). (2008). “Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures.”, American Concrete Institute, Detroit.
ASTM. (1995). “Standard test method for tensile properties of polymer matrix composite materials.”, West Conshohocken, PA.
Au, C., and Büyüköztürk, O. (2005). “Effect of fiber orientation and ply mix on fiber reinforced polymer-confined concrete.” J. Compos. Constr., 9(5), 397–407.
Bisby, L., Chen, J. F., Li, S. Q., Stratford, T. J., Cueva, N., Crossling, K. (2011). “Strengthening fire-damaged concrete by confinement with fibre-reinforced polymer wraps.” Eng. Struct., 33(12), 3381–3391.
Bisby, L. A., Dent, A. J. S., and Green, M. F. (2005). “Comparison of confinement models for fiber-reinforced polymer-wrapped concrete.” ACI Struct. J., 102(1), 62–72.
Bisby, L. A., and Stratford, T. J. (2010). “The ultimate condition of FRP confined concrete columns: New experimental observations and insights.” Proc., 5th Int. Conf. on FRP Composites in Civil Engineering (CICE 2010), Beijing, China, 599–602.
Bisby, L. A., and Take, W. A. (2009). “Strain localisations in FRP-confined concrete: New insights.” Struct. Build., 162(5), 301–309.
Bisby, L. A., Take, W. A., and Caspary, A. (2007). “Quantifying strain variation in FRP confined concrete using digital image correlation: Proof-of-concept and initial results.” Proc., 1st Asia-Pacific Conference on FRP in Structures (APFIS 2007), Hong Kong, 599–604.
Büyüköztürk, O., and Yu, T. Y. (2009). “Far-field radar NDT technique for detecting GFRP debonding from concrete.” Constr. Build. Mater., 23(4), 1678–1689.
Chen, J. F., Ai, J., and Stratford, T. J. (2007). “FRP strains in FRP wrapped columns.” Proc., Int. Conf. on Advanced Composites in Construction (ACIC 2007), Bath, UK, 107–115.
Chen, J. F., Ai, J., and Stratford, T. J. (2010). “Effect of geometric discontinuities on strains in FRP wrapped columns.” J. Compos. Constr., 14(2), 136–145.
Chen, J. F., Li, S. Q., Bisby, L., and Ai, J. (2011). “FRP rupture strains in the split-disk test.” Composites, Part B, 42(4), 962–972.
Concrete Society. (2004). “Design guidance for strengthening concrete structures using fibre composite materials.” Technical Rep. 55, 2nd Ed., Concrete Society, Camberley, UK.
De Lorenzis, L., and Tepfers, R. (2003). “Comparative study of models on confinement of concrete cylinders with fiber reinforced polymer composites.” J. Compos. Constr., 7(3), 219–237.
De Luca, A., Nardone, F., Matta, F., Nanni, A., Gian Piero, G., and Prota, A. (2011). “Structural evaluation of full-scale FRP-confined reinforced concrete columns.” J. Compos. Constr., 15(1), 112–123.
Deng, J. (2005). “Integrity of the adhesive bonding in steel beams strengthened with a carbon fibre composite plate.” Ph.D. thesis, Univ. of Southampton, UK.
Deng, J., Lee, M., and Moy, S. (2004). “Stress analysis of steel beams reinforced with a bonded CFRP plate.” Compos. Struct., 65(2), 205–215.
Fam, A., Flisak, B., and Rizkalla, S. (2003). “Experimental and analytical modeling of concrete-filled fiber-reinforced polymer tubes subjected to combined bending and axial loads.” ACI Struct. J., 100(4), 399–509.
Fam, A. Z., and Rizkalla, S. H. (2000). “Concrete-filled FRP tubes for flexural and axial compression members.” Proc., 3rd Int. Conf. on Advanced Composite Materials in Bridges and Structures (ACMBS-3), Canadian Society for Civil Engineering, Ottawa, Canada, 315–322.
Fam, A. Z., and Rizkalla, S. H. (2001). “Behavior of axially loaded concrete-filled circular fiber-reinforced plymer tubes.” ACI Struct. J., 98(3), 280–289.
Fardis, M. N., and Khalili, H. (1981). “Concrete encased in fibreglass-reinforced plastic.” ACI J., 78(6), 440–445.
Fardis, M. N., and Khalili, H. (1982). “FRP-encased concrete as a structural material.” Mag. Concr. Res., 34(121), 191–202.
Fitzwilliam, J., and Bisby, L. A. (2010). “Effects of slenderness on circular FRP confined concrete columns.” J. Compos. Constr., 14(3), 280–288.
Fraldi, M., Nunziante, L., Carannante, F., Prota, A., Manfredi, G., and Cosenza, E. (2008). “On the prediction of the collapse load of circular concrete columns confined by FRP.” Eng. Struct., 30(11), 3247–3264.
GB-50608. (2010). “Technical code for infrastructure application of FRP composites.” GB-50608, China Planning Press, China.
Harmon, T. G., and Slattery, K. T. (1992). “Advanced composite confinement of concrete.” Proc., of the 1st Int. Conf. on Advanced Composite Materials in Bridges and Structures, Canadian Society for Civil Engineering, Sherbrooke, Quebec, Canada, 299–306.
Harries, K. A., and Carey, S. A. (2003). “Shape and ‘gap’ effects on the behavior of variably confined concrete.” Cement Concr. Res., 33(6), 881–890.
Haskett, M., Oehlers, D. J., Ali, M. S. M., and Sharma, S. K. (2010). “The shear friction aggregate interlock resistance across sliding planes in concrete.” Mag. Concr. Res., 62(12), 907–924.
Haskett, M., Oehlers, D. J., Mohamed Ali, M. S., and Sharma, S. K. (2011). “Evaluating the shear-friction resistance across sliding planes in concrete.” Eng. Struct., 33(4), 1357–1364.
Hu, Y. M., Yu, T., and Teng, J. G. (2011). “FRP-confined circular concrete-filled thin steel tubes under axial compression.” J. Compos. Constr., 15(5), 850–860.
Italian National Research Council (CNR). (2004). “Guide for the design and construction of externally bonded FRP systems for strengthening existing structures.”, Italian National Research Council (CNR), Rome, Italy.
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, A. Mirmiran and A. Nanni, eds., International Institute for FRP in Construction (IIFC), 187–192.
Jiang, T., and Teng, J. G. (2007). “Analysis-oriented stress-strain models for FRP-confined concrete.” Eng. Struct., 29(11), 2968–2986.
Jin, X. N., Pan, J., Liu, L., G., Y., and Lai, W. H. (2003). “Research of stress-strain curve of concrete confined by fiber reinforced plastics under axial compression.” J. Build. Struct., 24(4), 47–53 (in Chinese).
Karbhari, V. M., and Gao, Y. (1997). “Composite jacketed concrete under uniaxial compression-verification of simple design equations.” J. Mater. Civ. Eng., 9(4), 185–193.
Kono, S., Inazumi, M., and Kaku, T. (1998). “Evaluation of confining effects of CFRP sheets on reinforced concrete members.” Proc., 2nd Int. Conference on Composites in Infrastructure (ICCI’98), Tucson, Arizona, 343–355.
Lam, L., and Teng, J. G. (2002). “Strength models for fiber-reinforced plastic-confined concrete.” J. Struct. Eng., 128(5), 612–623.
Lam, L., and Teng, J. G. (2003a). “Design-oriented stress-strain model for FRP-confined concrete.” Construction and Building Materials, 17(6–7), 471–489.
Lam, L., and Teng, J. G. (2003b). “Design-oriented stress-strain model for FRP-confined concrete in rectangular columns.” J. Reinf. Plast. Compos., 22(13), 1149–1186.
Lam, L., and Teng, J. G. (2004). “Ultimate condition of fiber reinforced polymer-confined concrete.” J. Compos. Constr., 8(6), 539–548.
La Tegola, A., and Manni, O. (1999). “Experimental investigation on concrete confined by fiber reinforced polymer and comparison with theoretical model.” Proc., 4th Int. Symp. on FRP for Reinforcement of Concrete Structures (FRPRCS-4), Baltimore, Maryland, 243–253.
Li, G. (2006). “Experimental study of FRP confined concrete cylinders.” Eng. Struct., 28(7), 1001–1008.
Li, G., Maricherla, D., Singh, K., Pang, S. S., and John, M. (2006). “Effect of fiber orientation on the structural behavior of FRP wrapped concrete cylinders.” Compos. Struct., 74(4), 475–483.
Li, S. Q. (2012). “FRP rupture strains in FRP wrapped columns.” Ph.D. thesis, The Univ. of Edinburgh, U.K.
Li, S. Q., Chen, J. F., Bisby, L. A., Hu, L. M., and Teng, J. G. (2012). “Strain efficiency of FRP jackets in FRP-confined concrete-filled circular steel tubes.” Int. J. Struct. Stab. Dyn., 12(1), 1–20.
Lignola, G. P., Prota, A., Manfredi, G., and Cosenza, E. (2008a). “Effective strain in FRP jackets on circular RC columns.” Proc., 4th Int. Conf. on Composites in Civil Engineering (CICE2008), Zurich, Switzerland (CD-ROM).
Lignola, G., Prota, A., Manfredi, G., and Cosenza, E. (2008b). “Unified theory for confinement of RC solid and hollow circular columns.” Composites, Part B, 39(7–8), 1151–1160.
Lu, G., Ye, L., Yang, C., and Feng, P. (2006). “Research on stress-strain relation of concrete confined with FRP tubes.” Eng. Mech., 23(9), 98–103 (in Chinese).
Mander, J. B., Priestley, M. J. N., and Park, R. (1988). “Theoretical stress-strain model for confined concrete.” J. Struct. Eng., 114(8), 1804–1826.
Matthys, S., Taerwe, L., and Audenaert, K. (1999). “Tests on axially loaded concrete columns confined by fiber reinforced polymer sheet wrapping.” Proc., 4th Int. Symp. on FRP for Reinforcement of Concrete Structures (FRPRCS-4), Baltimore, Maryland, 217–228.
Micelli, F., Myers, J. J., and Murthy, S. (2001). “Effect of environmental cycles on concrete cylinders confined with FRP.” Proc., Int. Conf. on Composites in Construction (CCC2001), A. A. Balkema, Porto, Portugal, 317–322.
Mirmiran, A., and Shahawy, M. (1997). “Behavior of concrete columns confined by fiber composites.” J. Struct. Eng., 123(5), 583–590.
Miyauchi, K., Nishibayashi, S., and Inoue, S. (1997). “Estimation of strengthening effects with carbon fiber sheet for concrete columns.” Proc., 3th Int. Symp. on FRP for Reinforcement of Concrete Structures (FRPRCS-3), Vol. 1, Japan Concrete Institute, Sapporo, Japan, 217–224.
Nanni, A., and Bradford, N. M. (1995). “FRP jacketed concrete under uniaxial compression.” Constr. Build. Mater., 9(2), 115–124.
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., 5(4), 237–245.
Picher, F., Rochette, P., and Labossiere, P. (1996). “Confinement of concrete cylinders with CFRP.” Proc., 1st Int. Conf. on Composites in Infrastructures (ICCI’96), Tucson, Arizona, 829–841.
Ranger, M., and Bisby, L. (2007). “Effects of load eccentricities on circular FRP-confined reinforced concrete columns.” Proc., 8th Int. Symp. on Fibre Reinforced Polymers for Reinforced Concrete Structures (FRPRCS8), Patras, Greece, 290–291.
Rochette, P., and Labossière, P. (2000). “Axial testing of rectangular column models confined with composites.” J. Compos. Constr., 4(3), 129–136.
Rousakis, T. (2001). “Experimental investigation of concrete cylinders confined by carbon FRP sheets, under monotonic and cyclic axial compressive load.” Work No. 44, Publication 01:2, Chalmers Univ. of Technology, Division of Building Technology, Göteborg, Sweden.
Saafi, M., Toutanji, H. A., and Li, Z. (1999). “Behavior of concrete columns confined with fiber reinforced polymer tubes.” ACI Mater. J., 96(4), 500–509.
Shahawy, M., Mirmiran, A., and Beitelman, T. (2000). “Tests and modeling of carbon-wrapped concrete columns.” Composites, Part B, 31(6–7), 471–480.
Smith, S. T., Kim, S. J., and Zhang, H. (2010). “Behavior and effectiveness of FRP wrap in the confinement of large concrete cylinders.” J. Compos. Constr., 14(5), 573–582.
Spoelstra, M. R., and Monti, G. (1999). “FRP-confined concrete model.” J. Compos. Constr., 3(3), 143–150.
Stratford, T. J., and Chen, J. F. (2005). “Designing for tapers and defects in FRP-strengthened metallic structures.” Proc., Int. Symp. on Bond Behaviour of FRP in Structures (BBFS 2005), World Scientific, Hong Kong, 453–458.
Tabbara, M., and Karam, G. (2008). “Numerical investigation of failure localization and stress concentrations in FRP wrapped concrete cylinders.” Proc., 5th Int. Conf. on Advanced Composites Materials in Bridges and Structures (ACMBS-V), Winnipeg, Manitoba, Canada, 10–20.
Tamuzs, V., Tepfers, R., and Sparnins, E. (2006). “Behavior of concrete cylinders confined by carbon composite 2. Prediction of strength.” Mechanics of Composite Materials, 42(2), 109–118.
Tamuzs, V., Valdmanis, V., Gylltoft, K., and Tepfers, R. (2007). “Behavior of CFRP-confined concrete cylinders with a compressive steel reinforcement.” Mech. Compos. Mater., 43(3), 191–202.
Teng, J. G., Chen, J. F., Smith, S. T., and Lam, L. (2002). FRP-strengthened RC Structures, Wiley, Chichester, UK.
Teng, J. G., Chen, J. F., Smith, S. T., and Lam, L. (2003). “Behaviour and strength of FRP-strengthened RC structures: A state-of-the-art review.” Struct. Build., 156(1), 51–62.
Teng, J. G., and Jiang, T. (2008). “Strengthening of reinforced concrete (RC) columns with fibre-reinforced polymer (FRP) composites.” Strengthening and Rehabilitation of Civil Infrastructures using Fibre-Reinforced Polymer (FRP) Composites, Woodhead, Cambridge, UK, 158–194.
Teng, J. G., and Lam, L. (2004). “Behavior and modeling of fiber reinforced polymer-confined concrete.” J. Struct. Eng., 130(11), 1713–1723.
Toutanji, H. (1999). “Stress-strain characteristics of concrete columns externally confined with advanced fiber composite sheets.” ACI Mater. J., 96(3), 397–404.
Watanabe, K., et al. (1997). “Confinement effect of FRP sheet on strength and ductility of concrete cylinders under uniaxial compression.” Proc., 8th Int. Symp. on Fibre Reinforced Polymers for Reinforced Concrete Structures (FRPRCS-3), Vol. 1, Japan Concrete Institute, Sapporo, Japan, 233–240.
Wu, Y. F., and Wang, L. M. (2009). “Unified strength model for square and circular concrete columns confined by external jacket.” J. Struct. Eng., 135(3), 253–261.
Wu, Y. F., and Zhou, Y. W. (2010). “Unified strength model based on Hoek-Brown failure criterion for circular and square concrete columns confined by FRP.” J. Compos. Constr., 14(2), 175–184.
Xiao, Y., and Wu, H. (2000). “Compressive behavior of concrete confined by carbon fiber composite jackets.” J. Mater. Civ. Eng., 12(2), 139–146.
Yu, T., Teng, J. G., and Chen, J. F. (2009). “Chapter 55: Failure criteria for FRP composites.” ICE Manual of Construction Materials, Thomas Telford, London, 649–654.
Zinno, A., Lignola, G. P., Prota, A., Manfredi, G., and Cosenza, E. (2010). “Influence of free edge stress concentration on effectiveness of FRP confinement.” Composites, Part B, 41(7), 523–532.
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Published In
Journal of Composites for Construction
Volume 17 • Issue 1 • February 2013
Pages: 67 - 78
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© 2013 American Society of Civil Engineers.
History
Received: Dec 27, 2011
Accepted: May 24, 2012
Published online: May 28, 2012
Published in print: Feb 1, 2013
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