Seismic Exposure Model at Regional and Over-Regional Scales to Analyze Local Masonry Building Typologies Through the Cartis Database: The Application on Northern Italy

Large-scale seismic risk assessments require a preliminary phase of qualitative and quantitative evaluation of all exposed elements: population, buildings, monumental assets, infrastructure, etc. Among these, knowledge of the built heritage represents a crucial aspect for understanding and addressing the consequences of earthquakes, both in terms of immediate interventions in emergency phase and in the planning of long-term strategies for risk reduction and prevention of effects on the territory. To address this issue, one solution is to identify representative building typologies in a given area to carry out both exposure and vulnerability assessments on the built environment of a territory, even with sophisticated analyses but with significantly reduced efforts thanks to the possibility of identifying a small number of archetype buildings. Therefore, the objective of this work is to develop an exposure model for identifying building typologies representative of areas of any extension, from municipal to national, through the definition of archetype buildings by statistically processing the information present in the CARTIS survey database. Here, in particular, the potential of a semi-automated procedure developed for the definition of a minimum portfolio of archetypes on different analysis scales has been identified: at the regional, over regional, and national scales. As a first validation, the data collected and processed on the regions belonging to Northern Italy were compared with the aim of extending the analysis sample to obtain exposure models on an increasingly larger scale.