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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Fig. 7. Complex plan for the structural unit identification. (a) ground floor. (b) second floor (coverage).

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Fig. 8. (a) Global model. (b) Some examples of the structural units models.

The vaults covering the kindergarten do not meet the requirements of the Italian Building Code, and other vaults of the same type could have such an outcome. The vault covering the lateral nave of San Nicolao Church on the West side is also not verified, given the increase of loads with respect to the original ones, due to the addition of a one-storey raising. Conversely, all the analysed vaults turn out to be verified under the Serviceability Limit State. Seismically, the major criticisms of the structure are related to the absence of the orthogonal vertical masonry panels’ connections or connections between horizontal elements (vaults or steel and wood slab), the limited presence of anti-seismic devices such as metal tie-rods or concrete bond beams and the widespread presence of vaults, with not-opposed thrusting force. From the observed vulnerabilities, out-of-plane overturning safety verifications, according with the Italian Building Code, have been carried out: following the kinematic linear analyses most of them were unsafe, presenting some problems of instability too (horizontal load multiplier less than zero). In case of historical aggregate buildings, the knowledge process represents a mandatory step for the definition of reliable structural models and for static and seismic analysis results. For the case study of Civitali Institut in Lucca, a masonry complex aggregate including a Church, many peculiar aspects has been highlighted through a detailed in situ investigation that included several essays on vertical and horizontal structural elements and mechanical characterization of the masonry types through partially destructive tests. Three different types of masonry have been recognized in the structure - stone, brick and mixed stone and brick masonry types - qualitatively and mechanically different from each other. The mixed one shows lower mechanical 4. Conclusions