A statistical analysis on the application of seismic isolation on existing buildings without local interventions

After the recent seismic events, many data about buildings damages and ground motion records were collected. The damage information, collected through the AeDES form, are now made available by the Italian Civil Protection on the Da.D.O. web-platform. The ground motions records data are available from various sources, among them one of the most complete is the database ESM (Luzi et a. 2016). In this paper, an analysis of data available on the Da.D.O. database is performed, with the aim to assess the reinforced concrete buildings which have suffered limited or no damage after L’Aquila earthquake of 2009. The GMs records are used in order to evaluate the intensity measure at a large territory scale and to roughly assess the seismic intensity suffered by each considered building. The overlap of this information allows the assessment of the minimum capacity exhibited by the building, this information is further used to define an innovative methodology in order to find the reinforced concrete (RC) buildings that are best suited for seismic isolation retrofit.