| Tukezban Hasanova, Jamila Imamaliyeva Dynamic characteristics of buildings based on vibration signal processing |
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| Abstract. Seismic behavior of a structure is directly related to its dynamic characteristics, which include natural frequency, damping ratio, and mode shape. This study focuses on the experimental study of the dynamic characteristics of buildings, which is based on recording low-intensity vibrations of a building caused by various natural factors (microseismic movements, wind, urban traffic, etc.). The registration of these vibrations is ensured by the latest seismic stations (digital accelerographs). Constant microseismic excitation of the soil is a complex form of stationary random vibrations. The building filters the excitation of the soil, selects and amplifies the components of destructive vibrations corresponding to the periods of its free vibrations. In computer automated vibration test control systems, functionality is largely determined by specialized software. Effective control algorithms ensure the reproduction of impacts corresponding to real operational impacts, the selection of maximum loading modes when testing for polyharmonic and random impacts. This article provides an analysis of studies of several buildings with different sensor placement schemes (in the basement, on the ground floor, at roof level) and the correlation between the dynamic characteristics obtained as a result of vibration signal processing. Interpretation of the recording results makes it possible to observe the behavior of the entire structure. These results are compared with the results of strong movements or with the results of dynamic analysis. |
| Keywords: Oscillation Periods, Spectral Response, Dynamic Impact, Building Monitoring, Vibration Control |
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| DOI: https://doi.org/10.54381/itta2024.16 |