ABSTRACT

Central Italy Earthquakes occurred in 2016 pointed out once more the vulnerability of Cultural Heritage (CH), especially for what concerns bell-towers since they tend to get dramatically damaged due to their considerable slenderness and deterioration, endangering their surroundings and making their preservation fundamental. This work presents the results of the study carried out on four different isolated masonry bell towers, located in Ferrara province (Italy); the parameters of the materials were deduced by calibrating Finite Element Models (FEMs) using the data collected during an investigation campaign conducted with a wired accelerometric sensor system, since it was not possible to apply destructive methodologies. Dynamic data were extracted through the application of two Operational Modal Analysis (OMA) identification techniques: the Enhanced Frequency Domain Decomposition (EFDD) and the Stochastic Subspace Identification (SSI) methodology. Particular attention was devoted to the use of MAC matrix in the validation of the mode shapes results.

抽象的

2016年发生的意大利中部地震再次指出了文化遗产（CH）的脆弱性，尤其是钟楼，因为钟楼由于其纤细和恶化而容易受到严重破坏，危及周围环境并使其保存成为根本。这项工作介绍了对位于意大利费拉拉省的四个不同的隔离式砖石钟楼进行的研究结果；由于无法应用破坏性方法，因此使用在有线加速度传感器系统进行的调查活动中收集的数据，通过校准有限元模型（FEM）来推断材料的参数。通过应用两种操作模式分析（OMA）识别技术来提取动态数据：增强频域分解（EFDD）和随机子空间识别（SSI）方法。特别注意的是在模式形状结果的验证中使用MAC矩阵。