edifici esistenti

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    • Il cambiamento di scala delle strutture per la verifica sismica su tavola vibrante: un telaio in c.a. progettato per carichi verticali

    Igor Lanese, Francesco Marazzi, Roberto Nascimbene

    The work presented here is one of the fundamental phases of a research programme on seismic evaluation of existing buildings, funded by the Department of Civil Protection and developed at the European Centre for Training and Research in Earthquake Engineering (Eucentre). The present article contains a brief summary of the general theory on scaling: this concepts are then specialised for RC structures to be tested on shaking tables. These ideas are finally applied to the numerical model of the studied building and actually under testing on the Eucentre shaking table.

    This paper is available in Italian only.

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    • Concezione strutturale e risposta sismica delle strutture lignee di copertura

    Claudio Chesi, Maria Adelaide Parisi, Chiara Tardini

    In view of assessing the seismic vulnerability of timber roof structures, it is necessary to define evaluation criteria for the various elements and features that influence the structural response. Ths work focuses on the structural concept, particularly interesting because of the numerous existing solutions; indeed, these structures, originally conceived for vertical loads, may be more or less apt to respond to seismic action. With the classic tools of modal and response spectrum analysis the effect of the structural concept has been investigated, in order to define a basis for classification criteria. The aspects that appeared to affect positively the seismic response are a suitable association of the design parameters, according to the traditional construction practice, and the effectiveness of the connections that realize the threedimensionality of the structure.

    This paper is available in Italian only.

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    • Il metodo dinamico per la verifica sismica di edifici esistenti: il caso dell’ospedale «Cristo Re» in Roma

    Cristiano Algeri, Paolo Panzeri, Giuseppe Rossi

    The seismic response of existent buildings can be conveniently performed using dynamic methods. This kind of methodology implies a reliable calculation pattern which is validated by dynamic tests on the structure. In this paper a specific analysis of a strategic masonry building – a civil hospital in Rome – is proposed. All the experimental tests were carried out on the structure without altering the functionality of the building, which was always in full operation during the tests.

    This paper is available in Italian only.