GNGTS 2016 - Atti del 35° Convegno Nazionale

372 GNGTS 2016 S essione 2.2 values ranging between 1.24% e 2.79% which are significantly lower than 5% which represent the value of the in force regulation. The evaluation of the existence of torsional effects, carried out through the simplified equation of Grimaz et al. (2011), set into evidence the existence of possible torsional effects as a consequence of a seismic input. Finally, the HVSR obtained from measurements performed in the neighbour of the building showed the presence of dominant spectral peaks at about 8.0 Hz. This allow us to leave out the possibility of significant soil-to-structure interferences since the fundamental frequencies of the building and the site are quite different. Acknowledgements. The present study was performed in the frame of an agreement between the University of Catania and the Department of Biologic Geologic and Environmental Sciences of the University. References Eurocode8; 2003: Design of structures for earthquake resistance-Part 1: general rules, seismic actions and rules for buildings, EN 1998 . European Committee for Standardization, Brussels. Faccioli E., Pessina V.: 2000; The Catania Project: earthquake damage scenarios for high risk area in the Mediterranean. CNR-Gruppo Nazionale per la Difesa Terremoti, Roma, p. 225. Gallipoli M.R., Mucciarelli M., Vona M.; 2008: Empirical estimate of fundamental frequencies and damping for Italian buildings . Earthquake Eng. Struct. Dyn. 38, 973–988. Gallipoli M.R., Mucciarelli M., Šket-Motnikar B., Zupanc´ic´ P., Gosar A., Prevolnik S., Herak M., Stipc¡evic´ J., Herak D., Milutinović Z., Olumćeva T.; 2009: Empirical estimates of dynamic parameters on a large set of European buildings . Bull. Earthq. Eng. http://dx.doi.org/10.1007/s10518-009-9133-6. Grimaz S., Barazza F., Malisan P.; 2011: Ambient-noise measurements for seismic risk mitigation of school buildings . Environmental semeiotics. 4, 55-62. Lombardo G., Coco G., Corrao M., Imposa S., Azzara R., Cara F., Rovelli A.; 2001: Results of microtremor measurements in the urban area of Catania (Italy) . Boll. Geofis. Teor. Appl. 42 (3–4), 317–334. Messele H., Tadese K.; 2002: The study of seismic behaviour buildings located on different site in Addis Ababa (Ethiopia) by usingmicrotremors and analytical procedure. Joint study onmicrotremors and seismic microzonation in earthquake countries . Workshop to Exchange Research Information, Hakone-Gora, Kanagawa, Japan. Monaco C., Catalano S., De Guidi G., Gresta S., Langer H., Tortorici L.; 2000: The geological map of the urban area of Catania (Eastern Sicily): morphotectonic and seismotectonic implications . Mem. Soc. Geol. Italy 55, 425–438. Panzera F., Lombardo G., Monaco C., Di Stefano A.; 2015: Seismic site effects observed on sediments and basaltic lavas outcropping in a test site of Catania, Italy . Natural Hazards, doi: 10.1007/s11069-015-1822-7 Panzera F., Rigano R., Lombardo G., Cara F., Di Giulio G., Rovelli A.; 2011: The role of alternating outcrops of sediments and basaltic lavas on seismic urban scenario: the study case of Catania, Italy . Bulletin of Earthquake Engineering 9 (2), 411-439 Parolai S., Facke A., Richwalski S.M., Stempniewski L.; 2005: Assessing the vibrational frequencies of the Holweide Hospital in the city of Cologne (Germany) by means of ambient seismic noise analysis and FE modelling . Nat. Hazards 34, 217–230. SESAME; 2004: Guidelines for the implementation of the H/V spectral ratio technique on ambient vibrations: Measurements, processing and interpretation . SESAME European Research Project WP12, deliverable D23.12, at http://sesame-fp5.obs.ujfgrenoble . fr/Deliverables, 2004.