This paper presents a finite element method (FEM) analysis of a gas turbine foundation using the Karagozian & Case Concrete (KCC) material model and the CONSTRAINED_LAGRANGE_IN_SOLID contact formulation to simulate the interaction between reinforcing steel and concrete. The structural system is modeled as a complete three-dimensional (3D) model with complex boundary conditions, including self-weight and turbine operational loads. The numerical results enable the evaluation of stress distribution, deformation characteristics, and the influence of anchor connections on structural stability. The developed model demonstrates high accuracy in simulating the nonlinear behavior of concrete and can predict failure mechanisms. The proposed approach can be applied in the design and assessment of industrial foundations subjected to dynamic loading.