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Computational Assessment of the progressive collapse of a five storey structure considering two different building codes

par Oliveira, Claudio E.M.;Berke, Peter ;Silveira, Ricardo A.M.;Massart, Thierry,Jacques
Référence International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering - COMPDYN 2013(4th: Kos, Greece), Proceedings of the International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering - COMPDYN 2013
Publication Publié, 2013

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Résumé :

The analysis and understanding of the progressive collapse of buildings plays significant role on the search for structural safety. The present work proposes the association of a corotational formulation, plasticity and a sectional degradation model for the analysis ofreinforced concrete (RC) buildings designed in accordance to fib and Eurocode and also the Brazilian building code (ABNT - NBR 6118). The model makes use of a layered Euler/Bernoulli-based beam formulation and takes into account both nonlinear and dynamicaspects. The material nonlinearity is based on a one-dimensional elastoviscoplastic model. A sudden column loss approach is considered, turning the formulation into a general one for dynamic analysis of planar RC frames. Also, by discretizing the transversal section into layers, it is possible to tackle the problem in a multiscale approach. The chosen structures intentionally assume the minimum requirements for the design of multi-storey edifices that are proposed by fib – Eurocode and ABNT - NBR 6118, being used to verify if these requirements are sufficient for enforcing structural safety and also to verify the major differences between those two building criteria concerning progressive collapse.