Fragility Curves and Economic Loss Assessment of RC Buildings after L'Aquila 2009 Earthquake

A buildings stock of 12,016 Reinforced Concrete (RC) buildings is investigated to propose vulnerability, fragility, and loss curves, as well as an Expected Annual Loss (EAL) assessment. The buildings data are collected within Da.D.O. database, considering the observed damage due to L'Aquila earthquake (2009). The adopted methodology allows us to add undamaged and not-surveyed buildings, not included within the database, by considering the typological distribution of two different reference municipalities. The obtained results highlight that the completed database allows a more reliable seismic risk assessment, even if resulting EAL is poorly influenced by reference municipality assumed for undamaged buildings estimation.

Automated summary

This study investigates a group of 12,016 reinforced concrete buildings and proposes vulnerability, fragility, and loss curves, as well as an assessment of expected annual loss. The buildings data collected from the Da.D.O. database includes observed damage from the 2009 L'Aquila earthquake. The methodology used allows for the inclusion of undamaged and not-surveyed buildings, which are not part of the database, by considering the typological distribution in two different reference municipalities. The results obtained demonstrate that the completed database enables a more reliable seismic risk assessment, with the expected annual loss being minimally affected by the reference municipality assumed for estimating undamaged buildings.