PSI - Issue 44

P. Sorrentino et al. / Procedia Structural Integrity 44 (2023) 1664–1671 P. Sorrentino et al. / Structural Integrity Procedia 00 (2022) 000 – 000

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Figure 6. 3D view of the model: foundation at different height.

3.5. The adjacent structures As the building Italian historical centers are very often the result of an uncontrolled urban development. For this reason, they are characterised by building erected in continuity each other, plan enlargements made by adding structural cells to the existing ones which share the same boundary wall (Formisano et al., 2010). There are many studies about the issue of aggregated buildings, starting with “Sicurezza e conservazione dei centri storici. Il caso di Ortigia” by Giuffrè A. (1993). Chieffo et al. (2021) proposed an empirical formulation which allows to predict the vibration period of structural units placed in aggregate configuration starting from the corresponding isolated ones. Angiolilli et al. (2021) derived fragility curves useful for the seismic risk analyses of existing unreinforced masonry buildings inserted in aggregate and evaluated the effects of different connection types between the adjacent units on the structural response through nonlinear dynamic analyses (NDA). The masonry building case study is part of an aggregate; in particular it has adjacent structures, as buildings with different height and a church (Figure 7).

Figure 7. Façade on Via Foria.

As already mentioned in Section 3.1, the construction of the convent dates to 1600, in the same period as the adjacent church. The design of the church was entrusted to Fra Nuvolo, a Dominican architect. The church is characterised by an oval plan, surrounded by six chapels, and its dome (Figure 8) is is lowered similarly to the Pantheon (Maio et al., 2016).