Elif Yazıksız
Emre Alpaslan
Abstract
Determining the modal parameters of historical buildings is crucial for understanding their dynamic behavior, which is essential for preserving them and ensuring their safety for future generations. Both experimental and numerical studies are frequently carried out to characterize certain modal properties, such as natural frequencies and natural mode shapes. Experimental studies typically use the operational modal analysis method, while numerical studies employ the finite element method. Vibration measurements of the structure under various environmental conditions, including wind and traffic, were used to determine the modal parameters. Nevertheless, disparities frequently occur between the modal parameters obtained from experimental research and those assessed by the finite element model. Usually, these discrepancies result from unknown characteristics like boundary conditions and material properties. The purpose of this study was to measure the vibrations of a historic elevated water tank with a history of 150 years in ambient conditions in order to determine its modal characteristics. It became clear from comparing the modal parameters found in the numerical and experimental investigations that the water tank's finite element model needed to be updated in order to match the findings of the experimental modal study. Future structural evaluations will be able to better understand the behavior of the structure with the generate of an updated finite element model.
Keywords
Finite Element Method, Operational Modal Analysis, Ambient Vibration, Modal Parameters, Historic Structure
