PSI - Issue 78

Elisabetta Bersanetti et al. / Procedia Structural Integrity 78 (2026) 372–378

378

slab was introduced at the base to connect the walls and deepen the floor level, ensuring that net interior heights match pre-existing values. Additional associated works include the construction of a perimeter floor joint, both along the exterior and within the courtyards, to separate the isolated parts from the ground. This will require reconfiguration of existing sidewalks accordingly. To implement base isolation, considering the elevation of the isolation plane, a trench (cavity) has been foreseen around the perimeter of the building, obviously also on internal courtyard. This is required to accommodate the increased displacements induced by the isolation system (up to 25 cm in all directions). Additionally, this intervention offers multiple benefits: it improves the basement’s hygiene by eliminating direct contact between masonry and soil, increases ventilation of basement areas by allowing the creation of new openings below the isolators, and enables new access points to the basement from the exterior for maintenance purposes. The feasibility of utilizing this space, designed with a minimum width of 1.5 meters, as a retention basin for stormwater management during extreme weather events, associated with recent climate change patterns, is currently under evaluation. References D.M. Infrastrutture 17/01/2018 nuove Norme tecniche per le costruzioni; CIRCOLARE 21 gennaio 2019, n. 7 C.S.LL.PP. “Istruzioni per l’applicazione dell’«Aggiornamento delle norme tecniche per le costruzioni»” di cui al decreto ministeriale 17 gennaio 2018; M.DOLCE, F.C. PONZO, A.DI CESARE, G.ARLEO, “Progetto di Edifici con Isolamento Sismico”, seconda edizione, Iuss Press C.CHRISTOPOULOS, A.FILIATRAULT foreword by V.V. BERTERO “Principles of Passive Supplemental Damping and Seismic Isolation” IUSS Press