Assessment, upgrading and strengthening of ageing civil infrastructure is a major task for Europe. The aim is to extend the life-time of existing concrete bridges without loss of safety. Nonlinear finite element analysis (NLFEA) can quantify the reserve capacity of existing structures and prevent premature dismantle; however, this technique is still seldom used in practice. 2D and 3D FE models, due to high time consumption and complexity, are barely applied at large scale. In this communication, a 1D layered frame model with force-interaction is used to simulate the experimental full scale test of a RC railway bridge in Örnsköldsvik, Sweden, failing in a combination of shear-bending-torsion. Available 2D and 3D NLFEA performed with commercial software are compared. Due to the computational efficiency and relative simplicity, the 1D layered frame model can be a reference for more sophisticated continuum models in preliminary assessment stages.
CitationFerreira, D.; Bairan, J.; Mari, A. Nonlinear FE analysis of a full scale in situ test on a RC bridge by means of a 1D layered frame model. A: Computational Modelling of Concrete and Concrete Strctures. "Proceedings of EURO-C 2014 : San Anton am Arlberg, Austria, 24-27 March 2014 : Computational Modelling of Concrete Strcutures". St. Anton Am Arlberg: CRC Press. Taylor & Francis Group, 2014, p. 917-925.
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