ABSTRACT

On August 21st 2017 an earthquake of magnitude Mw = 3.9 occurred in the Ischia Island (Italy), causing numerous damages to ordinary and monumental buildings and two casualties. Immediately after the earthquake, teams from the Universities of Napoli Federico II and ‘Parthenope’, carried out inspections on the churches of the island in two phases: the first was developed in the post-emergency and was mainly aimed to assess the overall damage and the usability checks through the A-DC form, issued by the Italian Ministry of Heritage and Cultural Activity and Tourism (MiBACT); the second phase was preparatory to the vulnerability assessment of each church, carried out by filling in the second level form, issued by the Italian Group for the Defence against Earthquakes (GNDT). Based on the available data, a database made of 27 churches was created to individuate the most representative typologies, to perform a territorial vulnerability assessment, to carry out a detailed analysis of the recorded damages and to construct damage probability matrices. Moreover, for a homogenous class of churches, a predictive formulation of the mean damage was assessed and compared with other formulations available in the literature. Finally, simplified methods for assessing the seismic safety of the inspected churches were applied to the database, in order to confirm the homogeneity of the Ischia churches in terms of seismic vulnerability.

摘要

2017 年 8 月 21 日，意大利伊斯基亚岛发生 Mw = 3.9 级地震，对普通和纪念性建筑造成大量破坏，造成两人伤亡。地震发生后，那不勒斯费德里科二世大学和“帕特诺普”大学的团队立即分两个阶段对岛上的教堂进行了检查：第一个阶段是在紧急情况后开发的，主要目的是评估整体损失和通过意大利遗产和文化活动与旅游部 (MiBACT) 发布的 A-DC 表格进行可用性检查；第二阶段是为每个教堂的脆弱性评估做准备，通过填写由意大利防震组织 (GNDT) 发布的二级表格进行。根据现有数据，创建了一个由 27 座教堂组成的数据库，以区分最具代表性的类型，进行领土脆弱性评估，对记录的损害进行详细分析，并构建损害概率矩阵。此外，对于同类教堂，平均损害的预测公式进行了评估，并与文献中可用的其他公式进行了比较。最后，将评估被检查教堂的地震安全性的简化方法应用于数据库，以确认伊斯基亚教堂在地震脆弱性方面的同质性。对于同类教堂，对平均损失的预测公式进行了评估，并与文献中可用的其他公式进行了比较。最后，将评估被检查教堂的地震安全性的简化方法应用于数据库，以确认伊斯基亚教堂在地震脆弱性方面的同质性。对于同类教堂，对平均损失的预测公式进行了评估，并与文献中可用的其他公式进行了比较。最后，将评估被检查教堂的地震安全性的简化方法应用于数据库，以确认伊斯基亚教堂在地震脆弱性方面的同质性。