Census-based typological usability fragility curves for Italian unreinforced masonry buildings

Abstract The main vulnerability models available in the literature aim to develop damage fragility curves estimate level suffered by a building after seismic event. However, recent earthquakes have highlighted great importance of predicting usability residential buildings, i.e. condition being habitable or occupiable performance can be used as an indicator for allocating economic funding event because researches demonstrated stronger correlation between repair costs and assessment rather than structural damage. Therefore, this work focused on development census-based preventive forecast Italian unreinforced-masonry buildings. proposed model was calibrated based 2009 L'Aquila earthquake database, including almost 60,000 database increased adding data from census account uninspected constructions. Six typological classes were defined considering two parameters both post-earthquake databases: construction timespan state repair. Additionally, it which cases number stories also relevant. function peak ground acceleration states: partially unusable unusable. results confirmed that older buildings are more vulnerable clearly pointed out crucial role parameter influencing usability.