GNGTS 2022 - Atti del 40° Convegno Nazionale

GNGTS 2022 Sessione 2.2 357 Each building surveyed is assigned the seismic vulnerability class according to the European macro-seismic classification E.M.S. 98, in accordance with the 1st level “SAVE” methodology. This methodology [9, 10] provides for the assignment of a base score, depending on the type of vertical structure, which is subsequently improved through the application of modifier coefficients (based on typological, geometric and structural characteristics of the building). The influence of each parameter has been previously calibrated on the statistics of seismic damage detected following earthquakes in the past. The score which is reached defines the final speditive evaluation of the vulnerability class. At the end, to assess the distribution of vulnerability classes for each minimum reference unit of the E.A.S.E. model a procedure based on statistical correlations between data from the 2011 ISTAT census and data collected in the field has been adopted [11]. ISTAT data on buildings refer to individual census sections, which may also contain several cells; therefore, a criterion for assigning census data to each cell was adopted according to the procedure proposed in Zuccaro 2021 [12]. The application of the procedure has produced the following distributions of vulnerability classes of the ordinary buildings reported in Fig 2. Fig. 2 - Buildings distribution (for cell in the map – for municipality in the histogram) on the vulnerability classes.