Strengthening of Reinforced Concrete Bridge Columns with FRP Wrap
Publication: Practice Periodical on Structural Design and Construction
Volume 11, Issue 4
Abstract
A compressive strength model for confined concrete wrapped with fiber-reinforced polymer (FRP) has been developed which is an extension of Mohr’s strength theory. This model explicitly relates the confined compressive stress, , to the confining pressure, . It is shown that in the general form this model requires information about the uniaxial compressive strength, , the uniaxial tensile strength, , and a quantity, , relating to the shape of Mohr’s envelope of ultimate strength states. A second-order parabolic model, developed analytically, is proposed for use with FRP-confined concrete. The proposed model has been verified using existing tests of normal strength concrete specimens confined by FRP wrap and tube previously reported in the engineering literature. For comparison, an empirical model using the same data was also developed. An application example for strengthening a reinforced concrete bridge column is also provided.
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References
American Concrete Institute, Committee 318 (ACI). (2002a). Building code requirements for structural concrete (ACI 318–02) and commentary (ACI 318R-02), Farmington Hills, Mich.
American Concrete Institute, Committee 440 (ACI). (2002b). Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures (ACI 440.2R-02), Farmington Hills, Mich.
Ansari, F., and Li, Q.-B., (1998). “High strength concrete subjected to triaxial compression.” ACI Mater. J., 95(6), 747–755.
Balmer, G. G. (1949). “Shearing strength of concrete under high triaxial stress computation of Mohr’s envelope as a curve.” Structural Research Laboratory Rep. No. SP-23, Branch of Design and Construction, Denver.
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.
Carey, S., 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.
Chen, W. F. (1982). Plasticity in reinforced concrete, McGraw-Hill, New York.
Chen, W. F., and Han, D. J. (1988). Plasticity for structural engineers, Springer, New York.
Chen, W. F., and Saleeb, A. F. (1994). Constitutive equations for engineering materials, elasticity and modeling, Vol. 1, Elsevier, New York.
Considere, A. (1903). Experimental researches on reinforced concrete, L. L. Moisseiff, translator, McGraw-Hill, New York.
Fan, S.-Ch., and Wang, F. (2002). “A new strength criterion for concrete.” ACI Struct. J., 99(3), 317–326.
Fardis, M. N., and Khalili, H. (1981). “Concrete encased in fiberglass reinforced plastic.” ACI Struct. J., 78(6), 440–446.
Gunawan, L., (2003). “Ultimate strength of plain concrete subjected to triaxial stresses.” Ph.D. thesis, Illinois Institute of Technology, Chicago.
Guralnick, S. A. (1960). “Strength of reinforced concrete beams.” Trans. Am. Soc. Civ. Eng., 125(1), 3036.
Harries, K. A., Kestner, J., Pessiki, S., Sause, R., and Ricles, J. (1998). “Axial behavior of reinforced concrete columns retrofit with FRPC jackets.” Proc., 2nd Int. Conf. on Composites in Infrastructures, 411–25.
Howie, I., and Karbhari, V. M. (1994). “Effect of materials architecture on strengthening efficiency of composite wraps for deteriorating columns in the north-east.” Proc., 3rd Conf. on Materials Engineering in Infrastructure: New Materials and Methods of Repair, Material Engineering Division, ASCE, 199–206.
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.
Khan, A. S., and Huang, S. (1995). Continuum theory of plasticity, Wiley, New York.
Lam, L., and Teng, J. G. (2002). “Strength models for fiber-reinforced plastic-confined concrete.” J. Struct. Eng., 128(5), 612–623.
Lokuge, W. P., Sanjayan, J. G., and Setunge, S. (2005). “Stress-strain model for laterally confined concrete.” J. Mater. Civ. Eng., 17(6), 607–616.
MacGregor, J. G., and Wight, J. K. (2004). Reinforced concrete: Mechanics and design, 4th Ed., Prentice-Hall, Upper Saddle River, N.J., 67–68.
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.
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., 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.
Mirmiran, A., et al. (1998). “Effect of column parameters on FRP-confined concrete.” J. Compos. Constr., 2(4) 175–185.
Miyauchi, K., Inoue, S., Kuroda, T., and Kobayashi, A. (1999). “Strengthening effects o f concrete columns with carbon fiber sheet.” Trans. Jpn. Concr. Inst., 21, 143–150.
Mohr, O. (1900). “Welche umstände bedingen die elastizitätsgrenze und den bruch eines materials.” Zeitschrift des Vereins Deutscher Ingenieure, 1524.
Nadai, A. (1950). Theory of flow and fracture of solids, 2nd Ed., Vol. 1, McGraw-Hill, New York, 89–108, 107–228.
Ottosen, N. S. (1977). “A failure criterion for concrete.” J. Engrg. Mech. Div., 103(4), 527–535.
Palaniswamy, G. R., (1973). “Fracture and stress–strain law of concrete under triaxial compressive stresses.” Ph.D. thesis, Univ. of Illinois at Chicago, Chicago.
Palaniswamy, R., and Shah, S. P. (1974). “Fracture and stress–strain relationship of concrete under triaxial compression.” J. Struct. Div., 100(5), 901–916.
Richart, E. F., Brandtzaeg, A., and Brown, L. R. (1928). “A study of the failure of concrete under combined compressive stresses.” Bulletin no. 185, Univ. of Illinois, Engineering Experiment Station, Urbana.
Rochette, P., and Labossière, P. (2000). “Axial testing of rectangular column models confined with composites.” J. Compos. Constr., 4(3): 129–136.
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.
Samaan, M., Mirmiran, A., and Shahawy, M. (1998). “Model of concrete confined by fiber composites.” J. Struct. Eng., 124(9), 1025–1031.
Sfer, D., Carol, I., Gettu, R., and Etse, G. (2002). “Study of the behavior of concrete under triaxial compression.” J. Eng. Mech., 128(2), 156–163.
Sika Carbo Dur. (2003) “Composite strengthening systems.” Engineering guidelines for design and application version 3.0 (CD-ROM), manufacturer’s literature.
Spoelstra, M. R., and Monti, G. (1999). “FRP-confined concrete model.” J. Compos. Constr., 3(3), 143–150.
Watanabe, K., et al. (1997). “Confinement effect of FRP sheet on strength and ductility of concrete cylinders under uniaxial compression.” Proc., 3rd Int. Symp. on Nonmetallic Reinforcement for Concrete Structures, Japan Concrete Institute, Japan.
Willam, K. J., and Warnke, E. P. (1975). “Constitutive model for the triaxial behavior of concrete.” IABSE Proc., Vol. 19, 1–30.
Xiao, Y., and Wu, H. (2000). “Compressive behavior of concrete confined by carbon fiber composite jackets.” J. Mater. Civ. Eng., 12(2) 139–46.
Yu, M. H. (1983). “Twin shear stress yield criterion.” Int. J. Mech. Sci., 25(1), 71–74.
Information & Authors
Information
Published In
Practice Periodical on Structural Design and Construction
Volume 11 • Issue 4 • November 2006
Pages: 218 - 228
Copyright
© 2006 ASCE.
History
Received: Oct 19, 2005
Accepted: Nov 29, 2005
Published online: Nov 1, 2006
Published in print: Nov 2006
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