Urban risk assessment : fragility functions for masonry buildings

The seismic risk analysis of buildings at urban scale requires the effective classification of the exposure and the definition of the vulnerability through reliable fragility curves. Fragility curves give the probability of attainment of certain damage measures (limit states) as a function of a proper intensity measure of the earthquake. A suitable taxonomy for ordinary masonry buildings and its use in the assets classification is proposed. With regards to vulnerability models a procedure for estimating the fragility curves, from both expert elicitation and analytical models, is described. In particular, the latter considers a rigorous evaluation of uncertainties. Keywords—Seismic vulnerability, Risk assessment, Fragility curves, Masonry, Taxonomy.

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