SRB (Seismic Resilience-Based) methodology for historical centers: San Marino case study

In the last two decades, seismic resilience (SR) has been developed as a main concept for the assessment of the structural vulnerabilities of buildings and city centres. In particular, historical centers consist of adjacent buildings organized in blocks with common characteristics and similar typologies. The paper proposes a methodology to quantify SR for urban regions, by overcoming the state of the art studies that focus on assessing the SR for singular buildings. In this regard, the presented methodology may calculate the SR of blocks of buildings for the assessment of recovery investments of historical city centers. The main idea is to assess the level of vulnerability by accurate 3D surveys and visual inspections in order to select empirical fragility curves. The proposed methodology was herein applied to the city center of San Marino, designated by UNESCO as a world heritage site.