PSI - Issue 44

Romina Sisti et al. / Procedia Structural Integrity 44 (2023) 1116–1123 R. Sist et al. / Structural Integrity Procedia 00 (2022) 000 – 000

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4. Conclusion The paper deals with a critical damage analysis of Palazzo Comunale in Camerino after the 2016-2017 seismic sequence and with the evaluation of the effectiveness of strengthening solutions adopted before the earthquake; the main outcomes provided by this study are reported in the following: • it is strongly required to properly improve the masonry quality in order to avoid the crumbling of wall panels (as demonstrated by the collapse of Teatro Marchetti's wall). • construction details play a crucial role to prevent local damage (as shown by the wall-truss connection in Palazzo Comunale). • it is fundamental to ensure a fast realization of the short-term countermeasures after the seismic events (the timely restoration of the roof of the theatre could have prevented the damages due to rainwater penetrations). • the 2016 seismic sequence caused damage in Palazzo Comunale less severe than those observed after the 1997 event demonstrating the effectiveness of extensive strengthening interventions on both vertical and horizontal structures. These interventions have strongly reduced the potential damage after the 2016 seismic sequence and they can be easily realized even on heritage and irregular buildings. The theoretical analyses provided results in good agreement with the damage observed after the earthquakes and showed that the renovation works carried out in 1999 significantly increased the seismic capacity of Palazzo Comunale (safety index from 0.35 to 0.65, +84%). Acknowledgements This work has been carried out under the financial support of the Italian Department of Civil Protection, within the DPC-ReLUIS- 2019 – 21, Work Package 7 WP 7 – Post Earthquake Data Analysis. CUP G56C18000610001. The authors would like to acknowledge Alessandro Esposito. References Allen, T.I., Wald, D.J., Hotovec, A.J., Lin, K., Earle, P.S., Marano, K.D., 2008. An Atlas of ShakeMaps for Selected Global Earthquakes: U.S. Geological Survey Open-File Report 2008 – 1236. Chiaraluce, L., Di Stefano, R., Tinti, E., 2017. The 2016 Central Italy seismic sequence: a first look at the mainshocks, aftershocks, and source models. Seismol Res. https:// doi. org/ 10. 1785/ 02201 60221 De Stefano, A., Matta, E. & Clemente, P., 2016. Structural health monitoring of historical heritage in Italy: some relevant experiences. J Civil Struct Health Monit 6, 83 – 106. https://doi.org/10.1007/s13349-016-0154-y Diaferio, M., Foti, D., Sabbà, M.F., Lerna, M., .2021. A procedure for the seismic risk assessment of the cultural heritage. Bull Earthquake Eng 19, 1027 – 1050. https://doi.org/10.1007/s10518-020-01022-8 Guerrieri, L., Blumetti, A.M., Esposito, E., Michetti, A.M., Porfido, S., Serva, L., Tondi, E., Vittori, E., 2009. Capable faulting, environmental effects and seismic landscape in the area affected by the 1997 Umbria – Marche (Central Italy) seismic sequence. Tectonophysics, 476, 269-281. Locati, M., Camassi, R., Rovida, A., Ercolani, E., Bernardini, F., Castelli, V., Ca racciolo, C.H., Tertulliani, A., Rossi, A., Azzaro, R., D’Amico, S., Antonucci, A., 2021. Database Macrosismico Italiano (DBMI15), versione 3.0. Istituto Nazionale di Geofisica e Vulcanologia (INGV), https://doi.org/10.13127/DBMI/DBMI15.3 Lagomarsino, S., Penna, A., Galasco, A., Cattari, S., 2013. TREMURI program: an equivalent frame model for the nonlinear seismic analysis of masonry buildings. Engineering Structures, 56, 1787 – 1799. http://dx.doi.org/10.1016/j.engstruct.2013.08.002. Malovrh Rebec, K., Deanovic, B., Oostwegel, L., Old Buildings need new ideas: holisti integration of conservation-restoration process data using Heritage Building Information Modelling, Journal of Cultural Heritage 55, 30-42, https://doi.org/10.1016/j.culher.2022.02.005 NTC 2018. Decreto Ministeriale 17/1/2018. Aggiornamento delle «Norme tecniche per le costruzioni». Ministry of Infrastructures and Transportations. G.U. S.O. n.42 on 20/2/2018; 2018 [in Italian] Saretta, Y., Sbrogiò, L., Valluzzi,M.R., 2021. Seismic response of masonry buildings in historical centres struck by the 2016 Central Italy earthquake. Calibration of a vulnerability model for strengthened conditions,Construction and Building Materials, 299, 123911, https://doi.org/10.1016/j.conbuildmat.2021.123911. Sisti, R., Di Ludovico, M., Borri, A., Prota A., 2022. Seismic performance of strengthened masonry structures: actual behaviour of buildings in Norcia and Campi Alto during the 2016 Central Italy seismic sequence, Bull Earthquake Eng 20, 321 – 348. https://doi.org/10.1007/s10518-021 01248-0 Yavartanoo, F., Kang, T. H.-K., 2022. Retrofitting of unreinforced masonry structures and considerations for heritage-sensitive constructions, Journal of Building Engineering, Volume 49,https://doi.org/10.1016/j.jobe.2022.103993