Original scientific paper

Dynamic Deformation Monitoring of a Technological Structure

Alojz Kopáčik orcid.org/0000-0002-3888-3940 ; Faculty of Civil Engineering, Slovak University of Technology, Bratislava, Slovak Republic
Imrich Lipták ; Faculty of Civil Engineering, Slovak University of Technology, Bratislava, Slovak Republic
Peter Kyrinovič ; Faculty of Civil Engineering, Slovak University of Technology, Bratislava, Slovak Republic
Ján Erdélyi ; Faculty of Civil Engineering, Slovak University of Technology, Bratislava, Slovak Republic

Abstract

Building structures are extremely sensitive to the influence of outdoor conditions, especially the influence of wind, temperature changes in the surroundings caused by sunshine, and the effect of the building’s own or operating load. According to the resonance of the structure with the surroundings, vibrations and oscillations in relatively high frequency intervals (1–100.0 Hz) occur. These phenomena significantly affect the static and dynamic characteristics of structures as well as their safety and functionality. The paper provides an example of monitoring these phenomena using surveying methods and instrumentation. The monitored structure (a desorbing tower) has a cylindrical shape. The measurements were made by a total station with a measurement frequency ca 2 Hz. The main point of the paper is an analysis of the dynamic behaviour of the structure using different methods for the spectral analysis of a time series. The use of a fast Fourier Transform and a Lomb-Scargle periodogram is described, and the frequencies of the structure’s oscillation are calculated.

Keywords

total station; dynamic deformation; frequency analysis; Fast Fourier Transformation; Lomb-Scargle periodogram

Hrčak ID:

109202

URI

https://hrcak.srce.hr/109202

Publication date:

20.9.2013.

Article data in other languages: croatian

Visits: 1.313 *