SEISMIC PERFORMANCE ASSESSMENT OF HISTORICAL CULTURAL HERITAGE MASONRY BUILDINGS: COCCHI SERRISTORI PALACE IN FLORENCE, ITALY

In Italy, historical cities have been built over the centuries through different interventions and remaking. Starting from Romans foundation, cityscapes have been modified and transformed, damaged by conflicts, renovated in buildings and the urban design. Cultural Heritage buildings, even if apparently congruent in façade motifs, have been subjected to the same type of changes and improvements. Because of their monumentality, prominence and central position, nowadays these buildings are usually involved in relevant uses, such as museums, representative palaces, schools. Cocchi Serristori Palace, located in Florence in piazza Santa Croce has been built during the Medieval period and renovated by Giuliano da Sangallo in the Renaissance. Following the latest interventions of XIII and XIX centuries, today the building represents the District Headquarter of the Historical Centre of Florence. In this paper the seismic performance assessment of the Palace has been made. The procedure has followed the Italian Guidelines for the seismic assessment of Cultural Heritage and it defined three different levels of evaluation. In particular, the latest two levels LV2 and LV3 allowed to estimate both local and global behaviour of the building due to seismic actions. The assessment has been checked trough kinematic analysis, dynamic modal analysis and non-linear static analysis. The results, expressed by the ratio between capacity and the corresponding demand, mark out the seismic performance of Cocchi Serristori Palace.