Abstract: Numerical model based on finite element method for analysis of steel frame structures is presented. Model is implemented in computer program  and implies application of 1D (beam) finite element. Large displacement theory with incremental-iterative solution of equilibrium equations is applied. Application of numerical model is presented on an example of steel frame structure where initial geometric imperfections are also included. It is shown that presented numerical model and computer program  can be used for practical design of steel frame structures according to EN 1993-1-1 . Main conclusions are given at the end.
Keywords: numerical model, 1D beam finite element, steel frame structure, large displacements theory, geometric imperfections