A MODIFIED MODEL OF KARAGOZIAN & CASE CONCRETE IN LOGOS SOFTWARE PACKAGE

The paper describes a local model of concrete on the basis Karagozian & Case (K&C) approach that is successfully used for computed description behavior and reinforced constructions under dynamic loadings. A modified option K&C presented aiming at expansion functional capabilities providing details its computer realization, which scarcely described in publications. Basic ratios are provided: equation state environment with compacting; limiting surfaces initial yielding flow, maximum residual strengths depend pressure; as function third invariant form William-Vonke; evolution damage; partially-associated plastic to account dilatancy; simplified regularization stage loss strength environment; isotropic reinforcement, strain rate using strengthening factor concrete; auto-generation parameters. Besides, following options have been introduced: degradation elastic hardness simulate cyclic loading; by mechanism viscoplastic flow; regularizing set energy destruction. represented realized explicit module LOGOS software package supercomputer. data scheme algorithm described. Model realization has verified test examples simulation samples quasi-static loading until destruction: uniaxial triaxial compression, two-axial compression stretching, stretching. considered problems show compliance experiments.