Modelling triaxial compression using the Microplane formulation for low confinement

摘要

A numerical model is develop to examine the effect of low confinement on the behavior of high strength con- crete columns, A 3-D model using the Microplane-M4 formulation with second order effects included using a total Lagrangian formulation is developed. A cylinder under uniaxial and triaxial stress states is modelled. Adjustments in The M4 model are proposed for the particular case of concrete columns under low confinement. Comparisons with Empirical formulas for uniaxial and triaxially confined concrete show excellent agreement.