Public housing population of Florence: seismic assessment of a case-study

Florence is one of the first Italian cities to have experienced the public housing; therefore, the public housing population of Florence is older than in the rest of the Country. It consists mostly of masonry buildings, and it does not comply the requirements provided by the current seismic legislation. This work is aimed at evaluating the seismic performance of a typical building belonging to the public housing population of Florence. The case-study has been represented through different models, in order to consider the different variations experienced by this building type, such as walls arrangement, number of storey, and slight irregularities in plan. The seismic input has been described according to the Italian Code prescriptions, by considering the effective soil stratigraphy, and assuming different hypotheses for the mechanical properties of each layer. The seismic performance of the case-study has been checked by performing a nonlinear static analysis. The results are expressed in terms of seismic performance, defined as the ratio between the seismic capacity and the corresponding demand. The obtained results evidenced the role of both building and soil variability on the seismic assessment of the case-study.