Hybrid Models for Efficiently Analysing Overall and Local Stability Problems in the Bridge Design Process

This contribution presents a novel approach for bridge design analyses. The full 3D design analysis is based on a hybrid model combining advantages of the classical beam theory and the Finite Element Method. With defining few additional parameters, the deformability of the cross-section can be taken into account by using Finite Element techniques up to any required level of accuracy. Instead of presenting FE results like stresses in Gauss points – this novel approach provides integral “beam-like” results for each segment face. The user can freely choose the number of integral result. This allows for applying standard design check routines in the post-processing phase in accordance with current design codes, which are usually based on “beam” results.