In this paper, empirical fragility curves for reinforced concrete buildings are derived, based on post-earthquake damage data collected in the aftermath of earthquakes occurred in Italy in the period 1976–2012. These data, made available through an online platform called Da.D.O., provide information on building position, building characteristics and damage detected on different structural components. A critical review of this huge amount of data is carried out to guarantee the consistency among all the considered databases. Then, an in-depth analysis of the degree of completeness of the survey campaign is made, aiming at the identification of the Municipalities subjected to a partial survey campaign, which are discarded from fragility analysis. At the end of this stage, only the Irpinia 1980 and L’Aquila 2009 databases are considered for further elaborations, as fully complying with these criteria. The resulting database is then integrated with non-inspected buildings sited in less affected areas (assumed undamaged), to account for the negative evidence of damage. The PGA evaluated from the shakemaps of the Italian National Institute of Geophysics and Volcanology (INGV) and a metric based on six damage levels according to EMS-98 are used for fragility analysis. The damage levels are obtained from observed damage collected during post-earthquake inspections through existing conversion rules, considering damage to vertical structures and infills/partitions. The maximum damage level observed on vertical structures and infills/partitions is then associated to the whole building. Fragility curves for two vulnerability classes, C2 and D, further subdivided into three classes of building height, are obtained from those derived for specific structural typologies (identified based on building height and type of design), using their frequency of occurrence at national level as weights.

本文基于1976-2012年意大利地震发生后收集的震后破坏数据，得出了钢筋混凝土建筑的经验脆性曲线。这些数据通过称为Da.DO的在线平台提供，可提供有关建筑物位置，建筑物特征以及在不同结构组件上检测到的损坏的信息。对大量数据进行了严格审查，以确保所有考虑的数据库之间的一致性。然后，针对调查活动的完整性程度进行了深入分析，目的在于确定进行了部分调查活动的市政当局，将其从脆弱性分析中丢弃。在此阶段结束时，由于完全符合这些标准，因此仅考虑Irpinia 1980和L'Aquila 2009数据库进行进一步的阐述。然后，将生成的数据库与位于受影响较小的区域（假定未损坏）中的未经检查的建筑物集成在一起，以解决损坏的负面证据。根据意大利国家地球物理与火山研究所（INGV）的振动图评估的PGA和基于EMS-98的基于六种破坏水平的度量用于脆弱性分析。损伤水平是从地震后检查期间通过观察到的损坏（通过现有的转换规则）获得的，其中考虑了对垂直结构和填充物/分隔物的损坏。然后，将垂直结构和填充物/隔板上观察到的最大破坏程度与整个建筑物相关联。