Model of FRP-Confined Concrete Cylinders in Axial Compression
Publication: Journal of Composites for Construction
Volume 13, Issue 5
Abstract
This paper introduces a dilatancy-based analytical model of the response of an axially loaded concrete cylinder, confined with a fiber-reinforced polymer (FRP) composite jacket. Model construction is based on the experimentally based observation that the relation between axial secant stiffness and the lateral (dilatancy) strain is effectively unique for cylinders with the same unconfined concrete strength, although the confinement levels may differ. Model development incorporates strength degradation of the concrete with dilatancy (lateral dilation); this feature allows one to demonstrate that the performance of FRP-confined concrete is consistent with the strength envelope obtained from triaxial tests. Model validation is accomplished by comparisons with existing test database and the new results on large-scale concrete cylinders. The results of the validation reveal good agreement with key response functions and parameters. The present study illustrates basic constitutive equations to model FRP-confined concrete in a more rational manner.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
Financial support for this research has been provided by the UNSPECIFIEDTechnical Support Working Group (TSWG) as part of a major research program at University of California, San Diego for developing FRP-based blast hardening techniques for RC columns.
References
ACI Committee 440. (2007). “Report on fiber-reinforced polymer (FRP) reinforcement for concrete structures.” ACI 440R-07, Farmington Hills, Mich.
Attard, M. M., and Setunge, S. (1996). “Stress-strain relationship of confined and unconfined concrete.” ACI Mater. J., 93(5), 432–442.
Carrasquillo, R. L., Nilson, A. H., and Slate, F. O. (1981). “Properties of high strength concrete subject to short-term loads.” ACI J., 78(3), 171–178.
Comber, M., Phillippi, D., Lee, C. -S., Hegemier, G., and Seible, F. (2008). “Uniaxial compression tests on full-scale CFRP-confined columns: Report of testing results.” Rep. Prepared for Structural Engineering Dept., UCSD, La Jolla, Calif.
Dahl, K. K. B. (1992). “A constitutive model for normal and high strength concrete.” Rep. Prepared for Structural Engineering Dept., Technical Univ. of Denmark, Lyngby, Denmark.
Dias da Silva, V., and Santos, J. M. C. (2003). “Strengthening of axially loaded concrete cylinders by surface composites.” Proc., Int. Conf. On Composites in Construction, Balkema, Lisse, The Netherlands, 239–243.
Fam, A. Z., and Rizkalla, S. H. (2001). “Confinement model for axially loaded concrete column confined by circular fiber-reinforced polymer tubes.” ACI Struct. J., 98(4), 451–461.
Hegemier, G. A., and Read, H. E. (1985). “On deformation and failure of brittle solids: Some outstanding issues.” Mech. Mater., 4(3&4), 215–259.
Imran, I., and Pantazopoulou, S. J. (1996). “Experimental study of plain concrete under triaxial stress.” ACI Mater. J., 93(6), 589–601.
Jiang, T., and Teng, J. G. (2007). “Analysis-oriented stress-strain models for FRP-confined concrete.” Eng. Struct., 29(11), 2968–2986.
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.
Lam, L., and Teng, J. G. (2003). “Design-oriented stress-strain model for FRP-confined concrete.” Construct. Build. Mater., 17(6&7), 471–489.
Lam, L., and Teng, J. G. (2004). “Ultimate condition of fiber reinforced polymer-confined concrete.” J. Compos. Constr., 8(6), 539–548.
Lee, C. -S., and Hegemier, G. A. (2004). “Model of FRP-confined concrete cylinders in axial compression.” Rep. No. SSRP-04/05, UCSD, La Jolla, Calif.
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.
Marques, S. P. M., Marques, D. C. S. M., Silva, J. L., and Cavalcante, M. A. A. (2004). “Model for analysis of short columns of concrete confined by fiber-reinforced polymer.” J. Compos. Constr., 8(4), 332–340.
Mastrapa, J. C. (1997). “Effect of construction bond on confinement with fiber composite.” MS thesis, Univ. of Central Florida, Orlando, Fla.
Matthys, S., Toutanji, H., and Taewe, L. (2006). “Stress-strain behavior of large-scale circular columns confined with FRP composites.” J. Struct. Eng., 132(1), 123–133.
Newman, K., and Newman, J. B. (1972). “Failure theories and design criteria for plain concrete.” Proc., Int. Civil Engineering Materials Conf. on Structural, Soil Mechanics and Engineering Design (Southampton, 1969), Part 2, Wiley, New Work, 963–995.
Owen, L. M. (1998). “Stress-strain behavior of concrete confined by carbon fiber jacketing.” MS thesis, Univ. of Washington, Seattle.
Pantazopoulou, S. J. (1995). “Role of expansion on mechanical behavior of concrete.” J. Struct. Eng., 121(12), 1795–1804.
Pantazopoulou, S. J., and Mills, R. H. (1995). “Microstructural aspects of the mechanical response of plain concrete.” ACI Mater. J., 92(6), 605–616.
Picher, F., and Labossière, P. (1996). “Confinement of concrete cylinders with FRP.” Proc., 1st Int. Conf. on Composites in Infrastructures, University of Arizona, Tucson, Ariz., 829–841.
Popovics, S. (1973). “Numerical approach to the complete stress-strain relation of concrete.” Cement Concr. Res., 3(5), 583–599.
Rocca, S., Galati, N., and Nanni, A. (2005). “Experimental evaluation of FRP strengthening of real size reinforced concrete columns.” Rep. No. UTC R142, Univ. of Missouri-Rolla, Mo.
Rochette, P., and Labossière, P. (2000). “Axial testing of rectangular column models confined with composites.” J. Compos. Constr., 4(3), 129–136.
Saenz, N., and Pantelides, C. P. (2007). “Strain-based confinement model for FRP-confined concrete.” J. Struct. Eng., 133(6), 825–833.
Samaan, M., Mirmiran, A., and Shahawy, M. (1998). “Model of concrete confined by Fiber composites.” J. Struct. Eng., 124(9), 1025–1031.
Shah, S. P., and Winter, G. (1966). “Inelastic behavior and fracture of concrete.” ACI J., 63(9), 925–930.
Smith, S. H. (1987). “On fundamental aspects of concrete behavior.” MS thesis, C.E.A.E. Dept., Univ. of Colorado, Boulder, Colo.
Spoelstra, M. R., and Monti, G. (1999). “FRP-confined concrete model.” J. Compos. Constr., 3(3), 143–150.
Teng, J. G., Huang, Y. L., Lam, L., and Ye, L. P. (2007). “Theoretical model for fiber-reinforced polymer-confined concrete.” J. Compos. Constr., 11(2), 201–210.
Toutanji, H. A. (1999). “Stress-strain characteristics of concrete columns externally confined with advanced fiber composite sheets.” ACI Mater. J., 96(3), 397–404.
Xiao, Y., and Wu, H. (2000). “Compressive behavior of concrete confined by carbon fiber composite jackets.” J. Mater. Civ. Eng., 12(2), 139–146.
Xie, J., Elwi, A. E. and MacGregor, J. G. (1995). “Mechanical properties of three high-strength concretes containing silica fume.” ACI Mater. J., 92(2), 135–145.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 13 • Issue 5 • October 2009
Pages: 442 - 454
Copyright
© 2009 ASCE.
History
Received: Apr 16, 2008
Accepted: Feb 23, 2009
Published online: Mar 6, 2009
Published in print: Oct 2009
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.