Confinement Model of Concrete with Externally Bonded FRP Jackets or Posttensioned FRP Shells
Publication: Journal of Structural Engineering
Volume 133, Issue 9
Abstract
A design-oriented confinement model for square and rectangular columns confined with bonded fiber-reinforced polymer (FRP) jackets, and shape-modified square and rectangular sections confined with posttensioned FRP shells is developed. The proposed design model for FRP-confined concrete columns is based on the bilinear four-parameter formulation by Richard and Abbott. The axial compressive strength of FRP-confined concrete is obtained using concrete plasticity theory based on the five parameter Willam and Warnke model. The ultimate axial strain of FRP-confined concrete is obtained from a strain-based approach depending on either passive or active confinement; the ultimate axial strain is based on the concepts of secant concrete modulus and strain dependent stiffness established by Pantazopoulou and Mills. Comparisons of the proposed stress-strain model with uniaxial compression experiments for columns with bonded FRP jackets or posttensioned FRP shells, performed by the writers and other researchers, show satisfactory agreement for the entire stress-strain curve.
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Acknowledgments
The writers acknowledge Professor Lawrence D. Reaveley of the University of Utah for constructive discussions. The writers acknowledge the financial support provided by the Utah Department of Transportation, the contribution of FRP composite materials from Sika and Air Logistics, and the contribution of Type K cement and Komponent from CTS Company.
References
ASTM. (2001). “Standard test method for tensile properties of polymer matrix composite material.” ASTM standards, 15.03, ASTM D3039, West Conshohocken, Pa.
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.
Klein, A., Karby, T., and Polivka, M. (1961). “Properties of an expansive cement for chemical prestressing.” J. Am. Concr. Inst., Proc., 58(1), 59–82.
Lam, L., and Teng, J. G. (2003). “Design-oriented stress-strain model for FRP-confined concrete in rectangular columns.” J. Reinf. Plast. Compos., 22(13), 1149–1186.
Moran, D. A., and Pantelides, C. P. (2002). “Stress-strain model for fiber-reinforced polymer-confined concrete.” J. Compos. Constr., 6(4), 233–240.
Moran, D. A., and Pantelides, C. P. (2005). “Damage-based stress-strain model for fiber-reinforced polymer-confined concrete.” ACI Struct. J., 102(1), 54–61.
Pantazopoulou, S. J., and Mills, R. H. (1995). “Microstructural aspects of the mechanical response of plain concrete.” ACI Mater. J., 92, 605–616.
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.
Richard, R. M., and Abbott, B. J. (1975). “Versatile elastic-plastic stress-strain formula.” J. Engrg. Mech. Div., 101(4), 511–515.
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.
Spoelstra, M. R., and Monti, G. (1999). “FRP-confined concrete model.” J. Compos. Constr., 3(3), 143–150.
Teng, J. G., and Lam, L. (2002). “Compressive behavior of carbon fiber reinforced polymer-confined concrete in elliptical columns.” J. Struct. Eng., 128(12), 1535–1543.
Teng, J. G., 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.
Willam, K. J., and Warnke, E. P. (1975). “Constitutive model for the triaxial behavior of concrete.” Proc., Int. Assoc. for Bridge and Struct. Engr., 19, 1–30.
Xiao, Y., and Wu, H. (2003). “Compressive behavior of concrete confined by various types of FRP composite jackets.” J. Reinf. Plast. Compos., 22(13), 1187–1201.
Yan, Z. (2005). “Shape modification of rectangular columns confined with FRP composites.” Ph.D. dissertation, Univ. of Utah, Salt Lake City.
Yan, Z., Pantelides, C. P., and Reaveley, L. D. (2007). “Post tensioned FRP composite shells for concrete confinement.” J. Compos. Constr., 11(1), 81–90.
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© 2007 ASCE.
History
Received: Sep 13, 2006
Accepted: Feb 28, 2007
Published online: Sep 1, 2007
Published in print: Sep 2007
Notes
Note. Associate Editor: Yan Xiao
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