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    • A Strategy for a Large-Scale Seismic Risk Mitigation of Infrastructures: the Case of the Campania Region

    Ivana Marino, Luigi Petti, Bruno Palazzo

    A multi-level approach to “catalogue” existing bridges in the meaning of seismic risk mitigation policies is herein presented and discussed. In particular, the proposed methodology lead to a list of priorities for existing bridges by considering the relevance of the road which they belong, the seismic and structural vulnerability and seismic hazard sites. Based on such information it is possible to proceed to verify the structural and seismic safety and/or repair bridges by considering the economic available resources. The methodology can be considered as reference and decision support tool in earthquake risk mitigation policies for the management and maintenance, vulnerability assessment and retrofit design of existing bridges in order to preserve the safety.

    For this paper is available an extended abstract after the text in Italian

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    • The Mapping of Post-Earthquake Damage Scenarios in Support of Municipal Emergency Plans

    Rachele Ferlito, Massimiliano Severino

    Nel presente lavoro viene proposta una metodologia, chiamata SCE-PEC, per la rappresentazione di scenari di danno post-sisma /1/, finalizzati agli obiettivi della pianificazione comunale dell’emergenza sismica /2,3/. Uno scenario di danno post-sisma contiene informazioni essenziali per la pianificazione delle attività delle Funzioni di Supporto /4,5/. Detta metodologia utilizza vari tipi di mappe con differenti livelli di elaborazione e sintesi: mappe di base, mappe di danno, mappe di sintesi e mappe per funzioni di supporto. La metodologia SCE-PEC è di tipo modulare e pertanto è possible applicarla parzialmente o integrarla con infor- mazioni aggiuntive.

    For this paper is available an extended abstract after the text in Italian

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    • “Dolcè Viaduct”: Pier Seismic Analysis with the Italian Code and Euro-Codes

    Gaetano Russo, Otello Bergamo, Stefano Donadello

    Damages due to seismic action on bridges are a direct consequence of the elastic approach of their design. The introduction of the new seismic norm in Italy and in the world have prescribed a ductile behavior for the piers subjected to action of earthquake. The bridge design based on a ductile behaviour of piers uses the for- mation of plastic hinges to reduce seismic action by dissipation of energy. The design of the “Dolcè” Viaduct, an important bridge of next realization in Verona area. This viaduct has me- dium span and composite structure steel-concrete, for it is evaluated the different security level and ductility of the seismic response depending on the configurations of the piers. The study takes into account the Euro-codes and the Italian norm.

    For this paper is available an extended abstract after the text in Italian

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    • Damage surveying and seismic vulnerability of churches: the Abruzzo earthquake (Italy)

    Stefano Podestà, Anna Brignola, Emanuela Curti, Sonia Parodi, Alberto Lemme

    The paper proposes some considerations about the seismic vulnerability of the Abruzzo (Italy) churches damaged after the 6th April 2009 earthquake and underlines the topics related to the seismic emergency management and to the temporary supports design for churches. Processing of the data obtained during the post-seismic surveying are thus presented such as the Damage Probability Matrices (DPMs) related to homogeneous macro-seismic area, the vulnerability curves, the distribution of possible and occurred damage mechanisms, together with the correla- tion between the damage index and the safeness of each building. Furthermore a methodology for the design of the temporary supports is proposed and applied to some churches located in Paganica (L’Aquila)

    For this paper is available an extended abstract after the text in Italian

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    • Effect of the new Italian Technical Regulations for Constructions on the seismic resistance of steel frames

    Edoardo M. Marino, Marco Muratore

    The Technical Regulations for Constructions of 2008 (D.M. 14/01/2008) are the final step of the development of the new seismic code which has taken place in Italy in the last five years: the O.P.C.M. 3274 in 2003, the O.P.C.M. 3431 and D.M. 14/09/2005 in 2005 and, finally the D.M. 14/01/2008 in 2008. This code has introduced important innovative seismic design practices for building structures, such as performance based design, use of strength criteria based on limit state method instead of allowable stress method, definition of high and low ductility structures, a new and very articulated framework for the evaluation of the design seismic force, capacity design criteria, etc. In this paper the regulations provided by the new Italian seismic code for steel moment-resisting frames and for concentrically braced frames are analysed and compared with those of the old Italian seismic code (D.M. 16/01/1996). The outcome of the comparison depends on the structural type, however the obtained results show that often lateral strength demand stipulated by the new code is less conservative.

    For this paper is available an extended abstract after the text in Italian