The footbridge Jesípek – application of radar interferometry for dynamic response evaluation

Authors

  • Miroslav Čáp Czech Technical University in Prague, Faculty of Civil Engineering, Department of Mechanics, Thákurova 7, 166 29 Prague 6, Czech Republic
  • Michal Polák Czech Technical University in Prague, Faculty of Civil Engineering, Department of Mechanics, Thákurova 7, 166 29 Prague 6, Czech Republic
  • Tomáš Plachý Czech Technical University in Prague, Faculty of Civil Engineering, Department of Mechanics, Thákurova 7, 166 29 Prague 6, Czech Republic
  • Milan Talich Czech Academy of Sciences, Institute of Information Theory and Automation, Pod Vodárenskou věží 4, 182 00 Prague 8, Czech Republic
  • Jan Havrlant Czech Academy of Sciences, Institute of Information Theory and Automation, Pod Vodárenskou věží 4, 182 00 Prague 8, Czech Republic
  • Lubomír Soukup Czech Academy of Sciences, Institute of Information Theory and Automation, Pod Vodárenskou věží 4, 182 00 Prague 8, Czech Republic
  • Filip Antoš Czech Academy of Sciences, Institute of Information Theory and Automation, Pod Vodárenskou věží 4, 182 00 Prague 8, Czech Republic

DOI:

https://doi.org/10.14311/APP.2023.40.0008

Keywords:

bridge dynamics, radar, radar interferometry, accelerometers

Abstract

Recent advances in radar systems have led to the development of radar interferometry (RI) methods for contactless vibration monitoring of large-scale structures, i.e. bridges, water tower reservoirs, and factory chimneys. Interferometric radars are devices capable to measure with 200 Hz sampling frequency and relative movement precision of 0.1 mm up to 0.01 mm. The major part of this paper describes an in-situ footbridge experiment near Hradec Králové. Radar interferometry devices were deployed along with ordinary techniques compounded by accelerometers, wiring, and acquisition station. Experiment was focused on the evaluation of basic dynamic structural properties such as natural frequencies and mode shapes. A lot of attention was also given to the result comparison of these measurement methods. Test results have confirmed the applicability of RI for bridge vibration monitoring.

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Published

2023-07-24

How to Cite

The footbridge Jesípek – application of radar interferometry for dynamic response evaluation. (2023). Acta Polytechnica CTU Proceedings, 40, 8-14. https://doi.org/10.14311/APP.2023.40.0008