Analisi a collasso di edifici in muratura in zona sismica

Investigation on structural behaviour of existing masonry buildings is a fundamental topic of earthquake engineering. In the last years new technical recommendations have been emanated in Italy (O.P.C.M. 3274 of 20/03/2003 and D.M. of 14/09/2005), introducing substantial modifications in the methods to evaluate the safety of existing masonry buildings. In the light of this, in the paper are presented two structural model to analyse regular buildings, a finite element model and a simplified model. Attention is focused on the masonry building subjectd to shaking table tests in the laboratory of the ENEA-Casaccia on December 2006 (TRE.RE.M. project). The FEM model is used to identify some numerical parameters of the dynamic response of the simplified model in the linear field. This second model is then used in order to investigate the seismic behaviour of the building in terms of limit state of collapse. Inelastic dynamic analysed (IDA) are used to this purpose.