GNGTS 2014 - Atti del 33° Convegno Nazionale

48 GNGTS 2014 S essione 2.1 Meletti C. & Valensise G. (a cura di); 2004: Zonazione sismogenetica ZS9-App.2 al Rapporto Conclusivo . Gruppo di lavoro per la redazione della mappa di pericolosità sismica. ����� �� ��� INGV, 38 pp. Meletti C., Galadini F., Valensise G., Stucchi M., Basili R., Barba S., Vannucci G., Boschi E.; 2008: A seismic source zone model for the seismic hazard assessment of the Italian territory . Tectonophysics, 450, 85– 108. Rogledi S.; 2013: Structural setting of the Central Po Plain . ���������� ������� �� ���� �������������� ����� �������� Ingegneria Sismica n. 1-2, gennaio-giugno 2013, 126-139. RovidaA., Camassi R., Gasperini P., Stucchi M. (a cura di); 2011: CPTI11, la versione 2011 del Catalogo Parametrico dei Terremoti Italiani . Milano, Bologna, http://emidius.mi.ingv.it/CPTI , DOI: 10.6092 /INGV.IT -CPTI11 Sani F., Bonini M., Piccardi L., Vannucci G., Delle Donne D., Benvenuti M., Moratti G., Corti G., Montanari D., Sedda L., Tanini C.; 2009: Late Pliocene−Quaternary evolution of outermost hinterland basins of the Northern Apennines (Italy), and their relevance to active tectonics . ������� ����� ���� ����� ����� ��� ������������� Special Issue “Ten years after the Umbria-Marche Earthquake, Central Italy. E. Tondi, L. Chiaraluce, and G. Roberts Editors. Tectonophysics, 476, 336-356. doi:10.1016/j.tecto.2008.12.012 Scandone P., Stucchi M.; 2000: La zonazione sismogenetica ZS4 come strumento per la valutazione della pericolosità sismica . In. Galadini F., Meletti C. e Rebez A. (a cura di), Le ricerche del GNDT nel campo dellapericolosità sismica (1996-1999). Gruppo Nazionale per la Difesa dai Terremoti, Roma, 3-14. Vannoli, P., Burrato,P., Valensise G.; 2014: The Seismotectonics of the Po Plain (Northern Italy): Tectonic Diversity in a Blind Faulting Domain . Pure Appl. Geophys. DOI 10.1007/s00024-014-0873-0. Input accelerograms and expected accelerations for some dam sites in southern Italy A. Rebez 1 , D. Sandron 1 , M. Santulin 1 , L. Peruzza 1 , A. Tamaro 1 , M. Eusebio 2 , M. Mucciarelli 1 , D. Slejko 1 1 OGS - Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Trieste, Italy 2 CESI S.p.A., Bergamo, Italy Introduction . A probabilistic seismic hazard analysis (PSHA) has been developed for selected sites located in Calabria (southern Italy) with the specific aim of accurately assessing the largest expected ground acceleration. The selected sites host hydroelectric dams that have to be seismically assessed, as requested by the Italian authority, and response spectra and accelerometric time histories are required as input parameters. The study has been developed for CESI S.p.A., that performs the dam seismic assessment under request of A2A S.p.A, owner of the plants. The seismic hazard analysis was designed to provide a broad spectrum of input ground motions suitable for the verification, through a mathematical model, of the structural behaviour of the dams. Geographical and geological framework . The plants analyzed in the present study fall within the area of the Sila Massif, in northern Calabria, and in particular in the Cosenza, Crotone, and Catanzaro provinces. The Sila Massif is a complex sector of the Calabrian Arc where subduction between the Adriatic and Ionian crust and the Calabrian crust occurs [see Van Dijk et al. (2000) and references therein]. From the geological point of view, the Sila Massif is mainly made of crystalline metamorphic Alpine and Hercynian rocks, referred to the Calabrian basement complex, with sedimentary Mesozoic carbonate rocks outcropping in small tectonic windows; they are covered by clastic and evaporitic formations of the Upper Miocene and Plio- Quaternary periods, due to several depositional cycles. The morphology of the Sila Massif, on the whole, is typical for an area affected by recent phases of rapid uplift [see Olivetti et al. (2012) and references therein], with high slope steepness, subjected to intense erosion at the borders, and summit flattened areas characterized by a mature morphology, in its central parts. Strike-slip and normal fault systems with recent documented activity have been recognised by several authors on-land and off-shore [e.g., Monaco and Tortorici (2000), Del Ben et al. (2008), Galli et al. (2008) and Loreto et al. (2013); additional references can be found in Peruzza et al. (2013���)]. Earthquake catalogue . The earthquake catalogue of the studied area is the basic information