PSI - Issue 11

Sonia Boschi et al. / Procedia Structural Integrity 11 (2018) 169–176 Author name / Structural Integrity Procedia 00 (2018) 000–000

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characteristics than the others do and in some portions the mixed masonry walls do not satisfy the static safety checks for the Ultimate State Limit. As regard the horizontal elements, several type have been identified, including vaults, steel and wood structures and hollow brick and reinforced concrete slabs. The vaults of the ground floor are the most vulnerable, as they are made of solid bricks, have a low profile and quite large spans. From the analyses, they do not meet the requirements of the Italian Building Code at least with respect to the Ultimate Limit States. The in-depth knowledge of the building has allowed identifying the various structural units that may be considered to have a unitary response against seismic actions. For each of them, accurate models have been implemented and results of the local and global behavior have been discussed. In most cases, local out-of-plane analyses studied by kinematic linear analyses, have shown lower results in terms of safety coefficients, due to both the absence of the orthogonal vertical masonry panels’ connections or connections between horizontal elements and the limited presence of anti-seismic devices.

Acknowledgements

The Authors thank Profs. M. Lucchesi and A. Vignoli of the University of Firenze that allowed and supported the present study and Ing. P. Saletti and Arch. A. Bassetti of the Lucca Administration. For their participation in the structural surveys and collaboration to the safety evaluation, the Authors thank Ing. N. Khalimov and S2R Society, spin-off of the University of Firenze.

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