Vulnerability and Seismic Exposure of Residential Building Stock in the Historic Center of Alcamo

The influence of exposure evaluation methodology in the assessment seismic vulnerability residential building stock historic center Alcamo, a town 45,000 inhabitants Western Sicily (Italy), hit by an earthquake 1968, is evaluated this study. A comparison estimates on basis description according to two different approaches performed. first, typical procedures at territorial scale, refers through accurate typological description, conducted using CARTIS survey form. form allows for detailed and prevailing ordinary types within areas characterized homogeneity fabric terms age construction, structural characteristics, construction techniques, distribution types. municipal scale based estimate total number units percentage each type compartment, obtained interviewing local technicians. second similar namely, drawing up building. damage scenarios with methods proves that approximations provided compartment-scale are compatible purposes scale.