It is a very difficult engineering issue to assess the earthquake performance levels of existing masonry structures and determine whether they require strengthening or retrofitting. The materials used in the production of masonry structures vary from region to region, even within the same structure, and the lack of standard mechanical properties of these materials makes it difficult to define the material model in the numerical models of such structures. It is known that these problems are eliminated by the Operational Modal Analysis (OMA) technique because it does not damage the structure and accelerates the process. In the framework of this research, experimental measurement of the 5-story masonry structure was taken with OMA, and numerical modeling was made by SAP2000v14 software. The damping ratio, natural frequencies, and mode shapes of the structure were determined. Frequency-domain-based methods were used in the analysis and evaluation of OMA responses from the Enhanced Frequency Domain Decomposition Method (EFDDM), while the Stochastic Subspace Identification Method (SSIM) was used for time-domain-based methods.

评估现有砌体结构的地震性能水平并确定是否需要加固或翻新是一个非常困难的工程问题。即使在相同的结构内，用于生产砖石结构的材料也会因地区而异，并且这些材料缺乏标准的机械性能，因此很难在此类结构的数值模型中定义材料模型。众所周知，通过操作模态分析（OMA）技术可以消除这些问题，因为它不会损坏结构并加速过程。在此研究的框架内，使用OMA对5层砖石结构进行了实验测量，并使用SAP2000v14软件进行了数值建模。阻尼比，固有频率，确定结构的模式形状。基于频域的方法用于分析和评估来自增强频域分解方法（EFDDM）的OMA响应，而随机子空间识别方法（SSIM）用于基于时域的方法。