Constitutive modeling of cementitious materials in the framework of chemoplasticity

In this paper, a multi-surface plasticity model for chemically reactive media such as shotcrete is described. It consists of the Drucker-Prager criterion for simulation of compressive failure and the Rankine criterion accounting for brittle material response under tensile loading. The material model is formulated in the principal stress space. The robustness of this formulation and, hence, the applicability of the proposed material model is demonstrated by means of the analysis of the Sieberg tunnel in Lower Austria. Insights into the structural response as well as the level of loading of the tunnel lining are given