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Effect of the Temperature on the Modal Properties of a Steel Railroad Bridge Cover

Effect of the Temperature on the Modal Properties of a Steel Railroad Bridge

Open Access
|Apr 2021

Abstract

The article is devoted to a study of the impact of various environmental conditions on modal parameters, such as natural frequencies and damping ratios. The modal analysis has been performed using the Stochastic Subspace Identification (SSI) method of measuring data every month on the same steel bridge structures located on an important railroad route from Prague (the Czech Republic) to Košice (Slovakia). The structure is approximately 60 m long, and the bearing structure is formed by two arch trusses. The bridge was exposed to ambient vibrations as well as to vibrations caused by a train passage. Accelerations and temperatures (the temperature of the air and the structure) were logged during the measurements. Natural frequencies were obtained from these acceleration data using the SSI method and processed into graphs of the dependencies between the natural frequencies and temperatures. Some statistical procedures were also applied.

DOI: https://doi.org/10.2478/sjce-2021-0001 | Journal eISSN: 1338-3973 | Journal ISSN: 1210-3896
Language: English
Page range: 1 - 8
Published on: Apr 13, 2021
Published by: Slovak University of Technology in Bratislava
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2021 Michal Venglár, Katarína Lamperová, published by Slovak University of Technology in Bratislava
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.