ADINA's capability in providing the user with the option to construct
his/her own material model is employed to add a simple concrete materi
al model. The simplicity of the model arises from the assumption of a
uniaxial state of stress and it can be used for nonlinear analysis of
members under primarily flexural and/or axial load. The effectiveness
of the model under monotonic, as well as cyclic loading, is shown thro
ugh analyses of three test problems.