As part of the Baustatik Baupraxis e.V. Research Colloquium 2021 in 2022 at Kloster Steinfeld (27.-30.09.2022), the Institute of Structural Analysis will present its current research results in the field of nonlinear constraints in the finite element method. The title is "Consideration of nonlinear constraints in nonlinear finite element analyses using master-slave elimination at system level".