PSI - Issue 44

A. Sandoli et al. / Procedia Structural Integrity 44 (2023) 1332–1339 A. Sandoli / Structural Integrity Procedia 00 (2022) 000 – 000

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5. Conclusions This paper deals with the seismic fragility assessment of Balvano (Italy) through hybrid-based urban fragility curves. The urban center of Balvano was struck by several high-intensity earthquakes over the centuries, and in particular by the M=6.90 1980 Irpinia earthquake which caused a high number of heavily damaged, partially and totally collapsed buildings. Building inventory pre-and post-1980 has been identified, and the following main results have been achieved:  Hybrid-based fragility curves resulted effective in reproducing the seismic fragility of urban areas, in fact, a good matching between the damage scenario occurred in 1980, and the predicted one was found. Then, the proposed methodology can represent a useful tool for predicting the damage scenario of minor Italian urban centres.  Damage Scenario Matrices, obtained through the hazard disaggregation analysis, has been introduced. They provided a more exhaustive damage prediction, resulting in proper support for urban-scale seismic assessment.  Comparison between predicted damage scenarios pre-and post-1980 showed the effectiveness of the first seismic prescriptions adopted for the reconstruction of Balvano after the 1980 earthquake. In fact, a significant reduction of both seismic vulnerability and EAL resulted from the conducted analyses.  In the future, the aspects regarding the generation of a web-GIS application and the development of more refined EAL models will be investigated. References ATC (1985) Earthquake damage evaluation data from Californian (ATC-13). Applied Technology Council, Redwood City Bazzurro, P., Cornell C.A., 1999. Disaggregation of seismic hazard. Bull of Seism Soc of America 89 (2), 501-520 Brando, G., De Matteis, G., Spacone, E., 2017. Predictive model for the seismic vulnerability assessment of small historic centres: Application to the inner Abruzzi Region in Italy. 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Fragility curves for Italian URM buildings based on a hybrid method. Bulletin of Earthquake Engineering 19(12), 4979-5013. Sandoli, A., Calderoni, B., Lignola, G.P., Prota, A., 2022. Seismic vulnerability assessment of minor Italian urban centres: development of urban fragility curves. Bulletin of Earthquake Engineering https://doi.org/10.1007/s10518-022-01385-0