NUMERICAL INVESTIGATION OF THE SEISMIC RESPONSE OF PRECAST BUILDINGS WITH INTEGRATED RC CLADDING WALLS

Abstract eng:
Recent earthquakes have dramatically shown the importance of cladding connections on the seismic response of precast buildings. In the present work, a numerical investigation on the behaviour of precast structures with RC panel walls with ‘fixed’ connections is reported. Simplified structural calculations and numerical analyses show that the seismic forces induced to the connections of the panels can be quite large. An extensive numerical and experimental program has been performed at the Laboratory for Earthquake Engineering of the National Technical University of Athens, Greece, within the framework of the FP7 European project SAFECLADDING, for the investigation of the behaviour of integrated connections and their effect on the overall structural response. In the numerical analyses presented herein, the behaviour of the panel-beam connections was modeled with inelastic rotational springs which were calibrated against the experimental data. The results show that the roof diaphragm has a profound effect on the way the forces are transmitted to the structural members and on the forces induced to the connections. For typical ground motions compatible with the code requirements, the inelastic response is generally restricted to the columns, while the panels behave practically elastically.

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