ABSTRACT

Construction methods have been developed at TU Wien, which enable the erection of bridges and shells without formwork. In the design of real structures on the basis of these construction methods only linear elastic finite element analysis were carried out. A linear elastic analysis, where the principle of superposition is applied and an automatic load case superposition is carried out, simplifies matters enormously during the design process. During the development of the bridge construction method, large scale experiments were carried out. In the paper the stress redistribution between the thin-walled plate elements and the filler concrete of a 30 m long post-tensioned girder over a period of seven years is studied using different material models and then compared to the experimental results. In the case of the reinforced concrete shell, the transformation process from the originally flat plate to a shell structure with double curvature was modelled using a nonlinear finite element program.