SEISMIC ASSESSMENT OF THE HISTORICAL MIXED MASONRY-REINFORCED CONCRETE GOVERNMENT PALACE IN LA SPEZIA

Government Palace in La Spezia is a six-story mixed masonry-reinforced concrete construction, built in 1926 and today seat of the Prefecture of La Spezia city (Italy). In the paper, after the description of the case study, the attention is focused on the evaluation of the seismic performance of the building. The seismic assessment is performed by means of a numerical hybrid approach: the reinforced concrete frame is modelled according to a concentrated plasticity beam-column element, while the masonry infill is simulated by a plane macro-element which interacts with the surrounding frame, by means of discrete distribution of nonlinear links. The 3D-model has been implemented in the computer code 3DMacro that allows the modelling of both unreinforced masonry and mixed reinforced concrete-masonry structures. According to the performed numerical simulation the building, although not designed to resist to seismic actions, does not possess a high vulnerability with reference to the expected earthquake in the construction site.