16 th World Conference on Earthquake, 16WCEE 2017 Santiago Chile, January 9th to 13th 2017 Paper N° 4155 Registration Code: S-U1464725957 A SINGLE-BUILDING COMPARISON WITH OBSERVED POST-EARTHQUAKE DAMAGE: THE CASE STUDY OF L’AQUILA MUNICIPALITY C. Del Gaudio (1) , P. Ricci (1) , G. M. Verderame (1) , G. Manfredi1 (1) (1) Department of Structures for Engineering and Architecture, University of Naples Federico II, Naples, Italy Abstract A damage scenario based on observational data collected in L’Aquila Municipality after the 6th April 2009 earthquake is compared with a predicted damage scenario derived from the application of a simplified analytical method for the seismic vulnerability assessment of Reinforced Concrete (RC) buildings at large scale. The observational damage scenario is derived from a database of 131 RC buildings located in the Municipality of L’Aquila, which after the 2009 earthquake were subjected to post-earthquake usability assessment procedure. The simplified analytical approach adopted is based on the Capacity Spectrum Method (CSM) to evaluate seismic capacity at different Damage States (DSs) based on the displacement capacity of structural and non-structural elements. DSs and the corresponding displacement capacity are defined through the interpretation of the observational-based DSs provided by the European Macroseismic Scale EMS-98. Data predicted by the adopted methodology are in good agreement with the observed damage distribution. Keywords: RC buildings; Infills; Mechanical; Seismic fragility; Damage States; Post-earthquake 1. Introduction Among natural disasters, earthquakes represent one of the most unpredictable, lethal and devastating phenomena from the economic and social standpoints, producing effects in spread geographical areas far away from the epicentral areas. The consequences in terms of casualties and direct or indirect damage to the structures and infrastructures are a function of the degree of urbanization and the demographic level of the affected areas, as well as the quality and type of constructions, which is significantly correlated to the presence or absence of seismic codes [1]. For this reason, there is an increasing interest in the development of methodologies able to produce reliable damage scenarios in order to support the decision process within policies of disaster prevention and emergency management. In the following, a simplified analytical method for the seismic fragility assessment of Reinforced Concrete (RC) buildings at large scale is presented [2, 3]. The proposed method is based on a simulated design procedure to define the structural model and on non-linear static analysis of a simplified structural model based on Shear- Type assumption to evaluate seismic capacity. Damage States (DSs) are defined according to the observational- based DSs provided by the European Macroseismic Scale (EMS-98) [4]. Presence of infills is considered, both taking into account their influence on the structural response and evaluating the damage to such non-structural elements. The methodology is used for the assessment of a damage scenario for a sample of 131 RC buildings located in L'Aquila Municipality, in the neighborhood of Pettino, subjected to the 6th April 2009 earthquake. Damage data are derived from the inspection forms collected by the Italian Department of Civil Protection (Dipartimento della Protezione Civile, DPC) right after the event. Furthermore, additional data about the location and plan dimensions of buildings collected during independent field surveys allow the construction of a geo-referenced database. The analytical damage scenario is derived taking into account uncertainties in seismic demand, material characteristics, and modelling parameters through a Monte Carlo simulation technique. Fragility curves are obtained for each building, leading to the evaluation of the expected damage through the values of the Peak Ground Acceleration (PGA) from the ShakeMap of the event provided by the Italian National Institute of Geophysics and Volcanology (Istituto Nazionale di Geofisica e Vulcanologia, INGV).