Extensions to the elastoplastic analysis with the aska program system

Abstract This article gives the theoretical background of the latest additions to the elastoplastic part of the general purpose program ASKA (Automatic System for Kinematic Analysis). Two independent topics are dealt with: a) material description concerning a combined isotropic kinematic hardening as well as a hydrostatic dependence of the yield condition and b) elastoplastic bending elements comprising a plate shell and a related stiffener. Two examples, one connected with a reinforced concrete plate and the other with soil mechanics (tunnel construction), illustrate the practical application.