Some aspects of local and global behaviour of RC structures submitted to earthquake - Experiments and modelling
Résumé
Many European buildings are situated in seismic region of low or moderate seismicity. Among these, a large part is not designed under parasismic regulations. Within this context the evaluation of the vulnerability of existing structures is an important issue. In the framework of the European program Ecoleader, a seismic research project has been performed around shaking table tests on mock-ups representing parts of reinforced concrete buildings, the structure of which is based on structural walls. The structure studied in this work is composed of two parallel walls linked with a perpendicular one that has openings. The walls are reinforced according to the current design practice in France that induces a small amount of reinforcement. Two kinds of finite elements models have been performed: a simplified one, based on multifiber beams and a refined one using a complete 3D description of the mock-up. It is shown that both models are able to describe the global behaviour of the structure and qualitatively the distribution of damage at the base of the specimen. Based on the results obtained, the simplified model is used to investigate numerically the behaviour of a wider variety of configurations that is practically impossible to study experimentally.
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