In the paper a new procedure to assign residential building structure typologies to seismic vulnerability classes is showed. The procedure, developed within the activities of the Research Project SAVE (Strumenti di Analisi di Vulnerabilità degli Edifici esistenti) supported by National Depart. of Civil Protection trough GNDT- INGV, represents a quick technique that, based on «first level» data (i.e. survey forms as: Abruzzo ’84, GNDT 9/86, AeDES, etc.), evaluates the seismic structural vulnerability by assigning single structures to a building type family of which the behaviour under seismic action is expected. The procedure, although is based on «poor information», introduces several parameters that allow to take into account, in the final vulnerability estimation, all the information possibly available on the structure characteristics about the building (structure types, layout, dimensions, geometry, materials etc.). The procedure has been calibrated using a large data-base containing all the damage data surveyed in several seismic events of the past in Italy, from the Irpinia earthquake in the 1980 up to the Molise earthquake in 2002, considering roughly 165.000 buildings, selected among the over 200.000 in the DB. Finally an application of the procedure to the «public & strategic buildings» in Campania Region is reported, this has been used to define the priority-list for the best allocation of the resources assigned to the Regions from the Ordinance 3362/2003 of the Government that states the strengthening of the most vulnerable strategic buildings in the regions. The results of the punctual sample check «in situ» are reported and a very good reliability of the procedure in this case is showed.
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