Evaluation of the effect of operational modal analysis algorithms on identified modal parameters of railway bridges
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Bibliographic Details
| Author(s): |
Mohammadreza Salehi
(Dept. of Civil Eng. And Energy Technology, Oslo Metropolitan University, Oslo, Norway)
Kultigin Demirlioglu (Dept. of Civil Eng. And Energy Technology, Oslo Metropolitan University, Oslo, Norway) Emrah Erduran (Dept. of Civil Eng. And Energy Technology, Oslo Metropolitan University, Oslo, Norway) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Congress: Structural Engineering for Future Societal Needs, Ghent, Belgium, 22-24 September 2021 | ||||
| Published in: | IABSE Congress Ghent 2021 | ||||
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| Page(s): | 441-449 | ||||
| Total no. of pages: | 9 | ||||
| DOI: | 10.2749/ghent.2021.0441 | ||||
| Abstract: |
The accuracy of modal parameters identified by Operational Modal Analysis (OMA) algorithms is of vital importance in vibration-based health monitoring. This paper reports the effects of using different OMA algorithms on identified modal parameters of railway bridges. For this purpose, comparison and application of three different OMA methods including FDD, ARX, SSI-COV are discussed. The vibration measurements are conducted on two railway bridges in Northern Norway for using five triaxial accelerometers. The first bridge is a single-span bridge with the length of 50 m, while the second is a two-span bridge with a total length of 85m. OMA has been conducted on the free vibration responses after passage of different types of trains including light-weight railway vehicles and heavily loaded iron ore trains to evaluate the variation of the identified modal parameters with the chosen algorithm and the vibration source on the OMA results. |
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| Keywords: |
modal identification modal parameters free vibration railway bridge OMA
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| Copyright: | © 2021 International Association for Bridge and Structural Engineering (IABSE) | ||||
| License: | This creative work is copyrighted material and may not be used without explicit approval by the author and/or copyright owner. |
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