ABSTRACT

The seismic response of masonry monumental structures is a debated matter. In this paper, the authors compare the dynamic response of the Santa Maria di Collemaggio basilica under low-intensity earthquakes to the dynamic response under operational conditions. A permanent number of accelerometers records the dynamics of the Santa Maria di Collemaggio basilica under both operational and seismic excitation. It is questioned whether the earthquake intensity and the ambient parameters affect the modal parameters. The Least-Squares Complex Exponential (LSCE) method leads to the FRF function estimation. The stable frequencies identify the linear modal parameters which are likely to reproduce the seismic response. The authors endeavour to discuss whether the detected variations of the modal parameters are due to possible structural or material non-linearities. A time-frequency analysis confirms the results of the linear identification method. Further, the estimate of the dynamic amplification factors gives a glance over the global response by evidencing the possible existence of a macro-element response pattern.

抽象的

砌体纪念碑结构的地震反应是一个有争议的问题。在本文中，作者将低强度地震中的圣玛丽亚大教堂大学的动态响应与运行条件下的动态响应进行了比较。永久数量的加速度计记录了在运行和地震激励下圣玛丽亚迪科莱马焦教堂的动态。人们质疑地震烈度和环境参数是否会影响模态参数。最小二乘复指数（LSCE）方法导致FRF函数估计。稳定频率确定了可能重现地震响应的线性模态参数。作者努力讨论检测到的模态参数变化是否是由于可能的结构或材料非线性所致。时频分析证实了线性识别方法的结果。此外，动态放大因子的估计通过证明宏观元素响应模式的可能存在，使全局响应一览无余。