GNGTS 2013 - Atti del 32° Convegno Nazionale

the base of the ductility, gives satisfactory results for inelastic response of a SDOF system, independently of its energy dissipation capacity. Analysing the energy spectra for each type of hysteretic behaviour, the results indicate that a SDOF system with low dissipation capacity moves faster than a SDOF system with higher dissipation capacity. Furthermore, it was observed that the acceleration of the structure reduces as the ductility increases. The phase where the system moves with reduced stiffness (plastic phase) is therefore of primary importance for the overall dynamic behaviour of the system. In the case of SDOF systems with the same ductility level, the type of hysteretic cycle was found not to markedly affect the structural response, as expected by the N2 method. As future development, MDOF structures must be investigated to confirm the results obtained from SDOF systems. References Amadio C, Rinaldin G, Macorini L.: 2011: An equivalent frame model for nonlinear analysis of unreinforced masonry buildings under in-plane cyclic loading, Proceedings of ANIDIS conference, Bari, Italy. ATC: 1996: Seismic Evaluation and Retrofit of Concrete Buildings, Products 1.2 and 1.3 of the Proposition 122 Seismic Retrofit Practices Improvement Program, California Seismic Safety Commission. In: Report No. SSC 96-01, ATC-40, Applied Technology Council, Redwood City, California. CEN, European Committee for Standardisation TC250/SC8; 2003: Eurocode 8: Design Provisions for Earthquake Resistance of Structures, Part 1.1: General rules, seismic actions and rules for buildings, PrEN1998-1. Chopra A.K.: 2011: Dynamics of Structures, Theory and Applications to Earthquake Engineering, Fourth Edition, Prentice Hall, 2011, ISBN-10: 0132858037. Fajfar P.: 1999: Capacity spectrum method based on inelastic spectra. In: Earthquake Engineering and Structural Dynamics, 28, pp. 979-993. Fajfar, P.: 2000: A Nonlinear Analysis Method for Performance Based Seismic Design, In: Earthquake Spectra, Vol. 16, No. 3, pp.573-592. Foliente G.C.: 1995: Hysteresis Modeling of Wood Joints and Structural Systems, Journal of Structural Engineering, Vol. 121, No. 6, June 1995, pp. 1013-1022, ASCE. DOI: 10.1061/(ASCE)0733-9445, 121:6(1013). Fragiacomo M., Amadio C., and Rajgelj S.: 2006: “Evaluation of the structural response under seismic actions using non- linear static methods.” In: Earthquake Engineering & Structural Dynamics, Vol. 35 No. 12, pp. 1511-1531. Freeman S.A.: 1978: Prediction of Response of Concrete Buildings to Severe Earthquake Motion, In: Douglas McHenry International Symposium on Concrete and Concrete Structures, SP-55, pp. 589-605, American Concrete Institute, Detroit. Krawinkler H.: 1994: “New trends in seismic design methodology”, Proc. 10th Eur. Conf. Earthquake Engng., Vol. 2, Vienna, Balkema, Rotterdam, Vol. 2, 1995, pp. 821, 830. Priestley M.J.N., Calvi, M.C., and Kowalsky, M.J.: 2007: Displacement-Based Seismic Design of Structures IUSS Press, Pavia, 670 pp. Priestley, M.J.N., Sritharan, S., Conley, J. R., Pampanin, S.: 1999: Preliminary results and conclusions from the PRESSS five-story precast concrete test-building. PCI Journal, Vol 44(6), pp. 42-67. Rinaldin G., Amadio C., Fragiacomo M.: 2013: A component approach for the hysteretic behaviour of connections in cross-laminated wooden structures. In: Earthquake Engineering and Structural Dynamics, Wiley Online Library, DOI: 10.1002/eqe.2310. SCENARI DI DANNO EMPIRICI E ANALITICI A CONFRONTO CON RECENTI TERREMOTI ITALIANI F. Sabetta 1 , E. Speranza 1 , B. Borzi 2 , M. Faravelli 2 1 Dipartimento della Protezione Civile, Roma 2 EUCENTRE - European Centre for Training and Research in Earthquake Engineering, Pavia Nelle prime ore successive al verificarsi di un evento sismico è particolarmente utile disporre di uno strumento che, utilizzando esclusivamente i parametri ipocentrali forniti in tempo reale dall’INGV, restituisca una prima stima dell’ordine di grandezza delle perdite attese al fine di pianificare in tempi ristretti le azioni da intraprendere per la gestione dell’emergenza. SIGE: approccio empirico. Presso il Dipartimento della Protezione Civile (DPC) è in uso ormai da più di 10 anni l’applicativo SIGE (Sistema Informativo per la Gestione dell’Emergen- za) che consente di calcolare le perdite, in termini di numero atteso di abitazioni crollate, ina- 136 GNGTS 2013 S essione 2.1