An extensive numerical investigation of the structural behavior of the masonry church of Sant’Agostino in Amatrice (Italy) during the 2016–2017 seismic sequence is presented. The seismic performance of the church is studied in relation to the most energetic shocks of the sequence, occurred on August 24th, 2016, and October 30th, 2016, whose seismic parameters (PGA, Trifunac duration, Arias intensity, destructiveness potential factor) are analyzed in detail. In particular, a comparison between ground motion data recorded by different stations is presented in order to evaluate the influence of local amplification effects on the structural behavior. To achieve this goal, the ground motion data recorded by the permanent accelerometric station (AMT) located in Amatrice on type B soil and belonging to the National Accelerometric Network (RAN) are firstly considered. Then, they are critically compared with those provided by an accelerometric station temporarily installed after the first main shock in the downtown area close to the church site, showing a clear amplification due to the site effects. The dynamic behavior of S. Agostino’s church is numerically investigated by carrying out a set of non-linear dynamic analyses on the 3D finite element model of the church developed in Abaqus CAE and considering as seismic input both the accelerograms recorded by the AMT fixed station and those including the local amplification effects. Non-linear properties of materials are taken into account by defining an elasto-plastic constitutive law with reasonable damage parameters in tension. Numerical results are evaluated in terms of displacement time-history of some relevant control points located on the masonry walls and maps of tensile damage cumulated at the end of the simulations. Numerical results are in good agreement with the evidence based behavior of the structure, thus validating numerical simulations as effective tools for seismic analysis of masonry buildings. Furthermore, a hypothetical strengthening intervention concerning the improvement in masonry mechanical properties is implemented in the model to investigate its positive role in preventing collapse. In the latter case, the approach provides useful hints in interpreting the behavior of the church under the application of repeated accelerograms.

提出了关于2016-2017年地震序列中阿马特里切（意大利）圣阿戈斯蒂诺砌筑教堂结构行为的广泛数值研究。研究了该教堂与2016年8月24日和2016年10月30日发生的最强烈震动有关的地震性能，并分析了其地震参数（PGA，三氟甲烷持续时间，阿里亚斯强度，破坏性潜在因子）详细地。特别是，对不同站点记录的地面运动数据进行了比较，以评估局部放大效应对结构行为的影响。为了实现这个目标，首先考虑了由位于B型土壤上Amatrice的国家加速度计网（RAN）的永久加速度计（AMT）记录的地面运动数据。然后，将它们与由教堂现场附近的市区第一次主震后临时安装的加速度计站提供的结果进行了严格的比较，显示出明显的放大效果。通过对Abaqus CAE中开发的教堂的3D有限元模型进行一组非线性动力学分析，并考虑AMT固定站记录的加速度图和地震记录作为地震输入，对S. Agostino教堂的动力学行为进行了数值研究。这些包括局部放大效应。通过定义具有合理的拉伸损伤参数的弹塑性本构律，可以考虑材料的非线性特性。根据位于砌体墙上的一些相关控制点的位移时间历程以及模拟结束时累积的拉伸损伤图，评估了数值结果。数值结果与结构的基于证据的行为非常吻合，从而验证了数值模拟作为砌体房屋地震分析的有效工具。此外，在模型中实施了一种有关砌体力学性能改善的假想强化干预措施，以研究其在防止坍塌中的积极作用。在后一种情况下，