Distribuzione nazionale della vulnerabilità media comunale

Abstract

The vulnerability assessment on large areas was carried out on residential buildings adopting a statistical approach that has been developed for this purpose. In fact, even though the method for evaluating single buildings vulnerability is quite well defined, it cannot be applied to large areas, not only because it would cost too much in money and time to survey each building, but also because the result would be useless at this scale, where the information needed for decision making is less detailed. Census data are a primary source in this case: they cover homogeneously the whole country though the information they provide permits only to estimate the total number of buildings, the total volume and a poor classification in terms of age and few typological parameters. The collection and review of available data regarding previous buildings vulnerability surveys performed by GNDT and census archives has been organised inside a database for the calibration of buildings vulnerability functions in the investigated area. The vulnerability evaluation for all Italian municipalities has been performed as a weighted mean of the average vulnerability index for each census classes.