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Structural Engineering and Mechanics
  Volume 12, Number 3, September 2001 , pages 231-248

Compression field modeling of confined concrete
E.Montoya, F.J. Vecchio and S.A. Sheikh(Canada)

    The three-dimensional behavior of confined concrete was investigated, including strength
enhancement due to triaxial compressive stresses, lateral expansion, compression softening, cover spalling
and post-peak ductility. A finite element program based on a nonlinear elasticity methodology was
employed to evaluate the ability to model triaxial behavior of reinforced concrete (RC) by combining
constitutive models proposed by several researchers. The capability of compression field based models to
reproduce the softening behavior of lightly cracked confined concrete was also investigated. Data from
tested specimens were used to evaluate the validity of the formulations. Good agreement with the
experimental results was obtained.
Key Words
    nonlinear; finite element; analysis; reinforced concrete; confinement; lateral expansion; columns.
E. Montoya, F.J. Vecchio and S.A. Sheikh, Department of Civil Engineering, University of Toronto, Toronto, Canada

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