PSI - Issue 44

Roselena Sulla et al. / Procedia Structural Integrity 44 (2023) 998–1005 Sulla et al./ Structural Integrity Procedia 00 (2022) 000–000

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The aim of this work was to investigate the influence of masonry strength and floor modeling on the global response under lateral loads. Preliminarily, three values of masonry strength and three diaphragm behaviors were considered for an ideal case study with three stories. For each type of floor the vertical loads have been changed accordingly. As regards the obtained results, one may observe that for all the pushover analyses a mixed response mechanism was obtained with slight differences among the cases analyzed. In particular, failures occurred at all levels mainly due to bending moment, both in the spandrels and in the piers. It can be observed that masonry strength is the primary factor on the lateral response of the case study analyzed. In fact, the lateral response is independent on the floor behavior in the case of ISM. On the other hand, if the masonry is of good quality, as in the case of BM, the diaphragm behavior modifies the response. The higher the strength the higher the floor stiffness influence on the global response. In all the cases, the global failure is not concentrated at one story but distributed over the walls. This study is the beginning stage of a work addressed to evaluate the influence of the capacity models of masonry elements (piers and spandrels) on the global response. Future studies will account for the axial force in the spandrels, as well as further masonry types. 3MURI. User manual. www.stadata.it. Beyer, K., Mangalathu, S., 2013. Review of strength models for masonry spandrels. Bulletin of Earthquake Engineering 11, 521–542. doi:10.1007/s10518-012-9394-3 Celano, T., Argiento, L. U., Ceroni, F., Casapulla, C., 2021. Literature Review of the In-Plane Behavior of Masonry Walls: Theoretical vs. Experimental Results. Materials 14, 3063. doi:10.3390/ma14113063 Circolare n. 7. (2019, January 21). Instructions for the application of the Italian building code M.D. (17/01/2018). Istruzioni per l'applicazione dell'«Aggiornamento delle "Norme tecniche per le costruzioni"» di cui al D.M. 17 gennaio 2018 (in Italian). Rome, Italy: Italian Ministry of Infrastructure and Transportation. D’Altri, A. M., Cannizzaro, F., Petracca, M., Talledo, D. A., 2022. Nonlinear modelling of the seismic response of masonry structures: Calibration strategies. Bulletin of Earthquake Engineering 20, 1999–2043. doi:10.1007/s10518-021-01104-1 D'Amato, M., Sulla, R., 2021. Investigations of masonry churches seismic performance with numerical models: application to a case study. Archives of Civil and Mechanical Engineering 21, 161. doi:https://doi.org/10.1007/s43452-021-00312-5 D'Amato, M., Gigliotti, R., Laguardia, R., 2019. Comparative seismic assessment of ancient masonry churches. Frontiers in Built Environment 5, 56. doi:https://doi.org/10.3389/fbuil.2019.00056 NTC. (2018). Ministerial Decree M.D. (17/01/2018). Aggiornamento delle "Norme Tecniche per le costruzioni" (in Italian). Rome, Italy: Italian Ministry of Infrastructure and Transportation. References