GNGTS 2013 - Atti del 32° Convegno Nazionale

References Albarello D., D’Amico V. (2008). Testing probabilistic seismic hazard estimates by comparison with observations: an example in Italy. Geophys.J.Int., 175, 1088–1094, doi: 10.1111/j.1365-246X.2008.03928.x Beauval C. (2011): On the use of observations for constraining probabilistic seismic hazard estimates - brief review of existing methods, International Conference on Applications of Statistics and Probability in Civil Engineering, August 1-4, Zurich, 5 pages. Gnedenko, B.V. (1976). The theory of probability . Mir publisher, Moscow, 392 pp. Luzi, L., S. Hailemikael, D. Bindi D, F. Pacor, F. Mele, and F. Sabetta (2008),  ITACA (ITalian ACcelerometric Archive): A Web Portal for the Dissemination of Italian Strong-motion Data , Seismological Research Letters, 79(5), 716–722. Doi: 10.1785/gssrl.79.5.716  Pacor, F., R. Paolucci, L. Luzi, F. Sabetta, A. Spinelli, A. Gorini, M. Nicoletti, S. Marcucci, L. Filippi, and M. Dolce (2011),  Overview of the Italian strong motion database ITACA 1.0 , Bull Earthquake Eng, 9(6), 1723–1739. Doi: 10.1007/s10518-011-9327-6 Schorlemmer D., Gerstenberger, M. C., Wiemer, S., Jackson, D.D., Rhoades, D.A. (2007). Earthquake Likelihood Model Testing, Seism. Res. Lett., Vol. 78, No. 1, 17-29 Senior Seismic Hazard Analysis Committee – SSHAC (1997). Recommendations for probabilistic seismic hazard analysis: guidance on uncertainties and use of experts. Report NUREG-CR-6372, in 2 volumes, Washington D.C., U.S. Nuclear Regulatory Commission. Soil Hazard assessment in italy: site-specific and regional-scale estimates within the framework of the DPC-INGV S2 2012-2013 project S. Barani 1 , M. Vanini 2 , E. Faccioli 2 , R. Paolucci 2 , C. Smerzini 2 , M. Villani 3 , G. di Capua 4 , G. Tarabusi 4 , C. Barnaba 5 , D. Spallarossa 1 , A. Rebez 5 , L. Martelli 6 , A. Piccin 7 , S. Rosselli 7 , L. Peruzza 5 1 Dipartimento di Scienze della Terra dell’Ambiente e della Vita, Università di Genova, Italy 2 Politecnico di Milano, Milano, Italy 3 Arup, London, UK 4 Istituto Nazionale di Geofisica e Vulcanologia – INGV, Roma, Italy 5 Istituto Nazionale di Oceanografia e di Geofisica Sperimentale – OGS, Trieste, Italy 6 Regione Emilia Romagna, Bologna, Italy 7 Regione Lombardia, Milano, Italy Foreword and scope of work. The seismic hazard maps developed by the MPS Working Group (2004), maps which are associated to the current Italian building code NTC08 (Ministero delle Infrastrutture e dei Trasporti, 2008), were the result of the last national effort in the field of probabilistic seismic hazard analysis (PSHA) (http://zonesismiche.mi.ingv.it/elaborazioni/) . Far-reaching in subsequent years was the role played by the DPC-INGV agreements in promoting research aimed at improving input data and methods for seismic hazard evaluation in Italy. The current DPC-INGV S2 project follows in the footsteps of previous projects. In particular, Task 4 (https://sites.google.com/site/ingvdpc2012progettos2/home ) has the objective of “translating” conventional hazard results from standard rock conditions to the soil surface by integrating site-specific information gathered during the project. In other words, the main goal is to include the amplification effects induced by local geology into probabilistic seismic hazard estimates. As it is well known, the severity and frequency content of the ground shaking at a site are significantly dependent on the soil characteristics and local geomorphological features. Therefore, PSHA based on the assumptions of level ground and exposed bedrock are acceptable in the case of large-scale hazard mapping as a basic level for the definition of the expected ground motion. However, in-depth analyses which account for local soil conditions are strongly advisable, because neglecting site response may result in a severe underestimation of the local hazard. How and where we played the game. We decided to explore site-specific seismic hazard assessment at some specific sites in Italy, in particular where the local soil conditions are sufficiently well known to allow for realistic ground motion predictions. We decided to focus 15 GNGTS 2013 S essione 2.1