PSI - Issue 64

Elide Nastri et al. / Procedia Structural Integrity 64 (2024) 153–160 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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For the initial three intensity levels (D, LS, NC), the collapse condition has not been met by the conclusion of the seismic event. However, for the PGA 0.35g case, a distinct scenario emerged, indicating the potential initiation of a collapse mechanism. This event became apparent in proximity to the seismic peak. It is important to underline that the structure has not undergone significant interventions. The main intervention in the 1980s aimed to ensure better cooperation between the masonry walls. This intervention was considered in the development of the FE model, and the obtained results appear to be compatible in terms of the type of damage and potential collapse mechanisms that could be activated. 5. Conclusions This study conducts a thorough seismic evaluation of the Caserta Vecchia Bell Tower in Caserta, Italy, integrating historical analysis, and dynamic characterization. Nonlinear dynamic FEA exposes critical structural conditions and potential collapse mechanisms, particularly focusing on damage evolution across different seismic intensity levels. The main results are reported in bullets: • AVT analysis calibrated the dynamic model, enhancing result accuracy. • Incremental analysis showed no collapse for first three limit states (D, LS, NC), confirmed by stress and damage assessments. • For PGA 0.35g, potential collapse mechanisms were detected, with activation near seismic peak. • Importance of comprehensive approach highlighted for assessing seismic vulnerability of historical structures, integrating photogrammetric survey, AVT, and nonlinear FEA. References Formisano, A., Vaiano, G., Fabbrocino, F., Milani, G. 2018. Seismic vulnerability of Italian masonry churches: The case of the Nativity of Blessed Virgin Mary in Stellata of Bondeno. Journal of Building Engineering, 20, pp. 179 – 200. DOI: 10.1016/j.jobe.2018.07.017. 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