3D multilevel approach for the seismic risk of historic centers

Italy is a country characterized by urban realities that present an extremely heterogeneous morphology generated by the development of the buildings in different historical periods. Due to their geographical position in the Italian orographic context, they are extremely exposed to seismic risk whose mitigation and reduction is a topic of particular interest. The representation models for displaying the main vulnerability phenomena provide important support for the analysis of structural vulnerability. With this awareness, the aim of this research is the definition of an integrated multilevel tool capable to manage, analyse and represent the multiplicity, heterogeneity and complexity of the data necessary for the evaluation of the seismic vulnerability of masonry buildings constituting the historic centers. Through in-depth knowledge and the use of parametric modelling systems (BIM) it is possible to determine the most likely collapse kinematics, on the basis of information deduced from a knowledge process, and therefore to evaluate the levels of seismic vulnerability of each structural unit both from a qualitative and quantitative point of view. This methodology is tested on a case study - San Rocco Village in Sora (FR) – and results are exposed.