GNGTS 2019 - Atti del 38° Convegno Nazionale

GNGTS 2019 S essione 2.2 423 was also made for calibration of the 2D numerical models. This latter was performed through the comparison among frequencies read from 1D transfer functions (under the hypothesis of visco-elastic linear soil behaviour) with the fundamental frequencies read from the H/V curves. The integration of results from 1D and 2D numerical modelling allowed defining the AF on selected areas, mainly corresponding to historical centers and most damaged neighborhoods. Areas most prone to amplification correspond to zones, where: i) it is evident a strong stratigraphic contrast (1D effect) between shallow bedrock and soft epiclastic cover; ii) the local tectonic setting forces lateral contrast between adjoining blocks (2D effect), which is the case of the deeply entrenched Piazza Maio Graben; iii) a combination of stratigraphic and structural forcing is expected, as is the case of the Panza blocks. Conclusions. Strong points from these studies are: i) the integrated approaches of both 1D numerical modelling with uncertainty and 2D deterministic numerical modelling; ii) a dense, well distributed and representative set of data; iii) characterization of numerous engineering - geological units of volcanic origin, in terms of Vs and G/G 0 -γ and D-γ curves; iv) the reconnaissance of areas with significant 2D effects related to buried morphologies and to peculiar morpho-tectonic settings. Acknowledgments. Authors thank the Government Commissioner and his team for the support to activities, and the professionals involved in the Government Commissioner Decree 1/2018: A. Toscano, F. Cuccurullo, A. D’Anna, L. Maccario, A. Oliviero, A. Berardi, C. Oliviero, A. Verta, G. Riello, A. Di Grazia, A. Iannotta, G. Lotito, F. Miragliuolo, A. Petriccione. References Acunzo G., Pagliaroli A., Scasserra G.; 2014: In-Spector: un software di supporto alla selezione di accelerogrammi naturali spettrocompatibili per analisi geotecniche e strutturali. 33° Convegno Nazionale GNGTS, Bologna 25- 27 Novembre 2014, volume 2, 107-114, ISBM: 978-88-940442-2-5. Cavinato G.P., Mancini M., Scarascia Mugnozza G., Working Group; 2018: Primi interventi urgenti di protezione civile conseguenti all’evento sismico che ha interessato il territorio dei comuni di Casamicciola Terme, di Forio e di Lacco Ameno dell’Isola di Ischia il giorno 21 agosto 2017, OCDPC n. 476 del 29 agosto 2017. CNR IGAG, relazione finale. Commissione Tecnica per la Microzonazione Sismica; 2015: Standard di Rappresentazione e Archiviazione Informatica, Versione 4.0b. Roma, 2015. Commissione Tecnica per la Microzonazione Sismica; 2017: Linee guida per la gestione del territorio in aree interessate da instabilità sismoindotte (FR), versione 1.0 . Roma, 2017. Cosentino G., Pennica F., Tarquini E.; 2018: MzSTools – QGIS Python Plugin - Software and Manual for the Italian seismic microzonation < https://plugins.qgis.org/plugins/MzSTools/ >. Gruppo di Lavoro MS; 2008: Indirizzi e criteri per la microzonazione sismica. Conferenza delle Regioni e delle Province Autonome – Dipartimento della Protezione Civile, Roma, 2008, 3 vol. e Dvd. Kottke A.R. and Rathje E.M.; 2008: Technical Manual for Strata, PEER Report 2008/10. Pacific Earthquake Engineering Research Center College of Engineering, University of California, Berkeley. Available at: <http:// peer.berkeley.edu/publications/peer_reports/reports_2008/web_ PEER810_KOTTKE_Rathje.pdf>. Hudson M., Idriss I.M., Beikae M.; 1994: QUAD4M—a computer program to evaluate the seismic response of soil structures using finite element procedures and incorporating a compliant base. University of California, Davis (California). NTC; 2018: Aggiornamento delle “Norme Tecniche per le Costruzioni” . Ministero delle Infrastrutture e dei Trasporti, Decreto 17 gennaio 2018, Rome. SMWorking Group; 2015: Guidelines for seismic microzonation. Conference of Regions and Autonomous Provinces of Italy, Civil Protection Department, Rome.