The analysis and design of a multiple residential building, seismically protected by a base isolation system incorporating double\nfriction pendulum sliders as protective devices, are presented in the paper.The building, situated in the suburban area of Florence,\nis composed of four independent reinforced concrete framed structures,mutually separated by three thermal expansion joints. The\nplan is L-shaped, with dimensions of about 75min the longitudinal direction and about 30malong the longest side of the transversal\ndirection.These characteristics identify the structure as the largest example of a base-isolated ââ?¬Å?artificial groundââ?¬Â ever built in Italy.\nThe base isolation solution guarantees lower costs, a much greater performance, and a finer architectural look, as compared to a\nconventional fixed-base anti seismic design. The characteristics of the building and the isolators, the mechanical properties and the\nexperimental characterization campaign and preliminary sizing carried out on the latter, and the nonlinear time-history design\nand performance assessment analyses developed on the base isolated building are reported in this paper, along with details about\nthe installation of the isolators and the plants and highlights of the construction works.
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