Seismic assessment of the historical mixed masonry-reinforced concrete Government Palace in La Spezia SAHC2014 – 9 th International Conference on Structural Analysis of Historical Constructions F. Peña & M. Chávez (eds.) Mexico City, Mexico, 14–17 October 2014 SEISMIC ASSESSMENT OF THE HISTORICAL MIXED MASONRY- REINFORCED CONCRETE GOVERNMENT PALACE IN LA SPEZIA M.Andreini 1 , I. Caliò 2 , F.Cannizzaro 2 , A. De Falco 3 , L.Giresini 4 , B.Pantò 2 and M.Sassu 3 1 University of Illinois at Urbana-Champaign Dept of Civil and Env. Engineering - Newmark Civil Engineering Laboratory 205 North Mathews Ave., Urbana, IL 61801-2352 - USA andreini@illinois.edu 2 University of Catania, DICA Viale A. Doria, 6, 95125 Catania {icalio,bpanto,francesco.cannizzaro}@dica.unict.it 3 University of Pisa, DESTEC Largo Lucio Lazzarino, 1, 56100 Pisa {a.defalco,m.sassu}@ing.unipi.it 4 RWTH Aachen, Lehrstuhl für Baustatik und Baudynamik Mies-van-der-Rohe-Straße 1, 52074 Aachen linda.giresini@lbb.rwth-aachen.de Keywords: mixed masonry-RC buildings, displacement based assessment, non-linear static analysis, macro-element, 3DMacro. Abstract. 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 nu- merical hybrid approach: the reinforced concrete frame is modelled according to a concen- trated 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 de- signed to resist to seismic actions, does not possess a high vulnerability with reference to the expected earthquake in the construction site.