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Mechanics of Composite Materials

, Volume 42, Issue 4, pp 303–314 | Cite as

Behavior of concrete cylinders confined by a carbon composite 3. Deformability and the ultimate axial strain

  • V. Tamuzs
  • R. Tepfers
  • E. Zile
  • O. Ladnova
Article

Abstract

Results of an experimental investigation into the mechanical properties of concrete cylinders confined by a carbon-epoxy composite wrapping are presented. It is shown that, for all the con fined con crete spec i mens tested, the loading paths in the normalized stress space follow a single master curve, what ever the concrete strength and confinement intensity. At stresses in the confined concrete exceeding the strength of plain concrete, the tangent modulus was found to depend on the slope angle of the master curve and the asymptotic value of the differential Poisson ratio (the first derivative of the lateral strain with respect to the axial one). Formulas for predicting the ultimate axial strain and the tangent modulus are derived and compared with the corresponding fib (fédération internationale du béton) recommendations.

Keywords

confined concrete carbon-epoxy composite ultimate strain tangent modulus 

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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • V. Tamuzs
    • 1
  • R. Tepfers
    • 2
  • E. Zile
    • 1
  • O. Ladnova
    • 1
  1. 1.Institute of Polymer MechanicsUniversity of LatviaRigaLatvia
  2. 2.Department of Civil and Environmental Engineering, Structural Engineering, and Concrete StructuresChalmers University of TechnologyGöteborgSweden

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