Object
Title: Reliability-Based Assessment of Galloping Instability of Thin-Walled Steel Beams
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Abstract:
Galloping instability relating to cross-wind vibrations can be found in flexible and lightly damped structures. In the present paper, the reliability of a thin-walled steel beam in maintaining its galloping stability was examined using a probabilistic approach. The analysis considered random variation in the cross-sectional geometrical properties of the beam, the material elastic modulus, the structural damping and the wind speed. A large number of Monte Carlo simulations were performed with normal and Gumbel distributions applied to the random variables to determine the probability distribution function of the safety margin. ; The limit state is considered violated when the wind speed exceeds the onset wind velocity of galloping, resulting in the aerodynamic damping being greater than the structural damping. It was shown by a conventional codified safety factor method that the beam was robust enough for galloping stability. By contrast, the probability-based assessment revealed that the beam failed to achieve the target reliability index in case the coefficient of variation of wind speed was greater than 5%. The analysis results suggested that the code-satisfied slenderness of the beam should be reduced by a factor of 1.5-1.7 under the action of wind speed with a coefficient of variation in the range 30-40%.
Description:
tytuł dodatkowy: Prace z Inżynierii Lądowej i Środowiska
Publisher:
Zielona Góra: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
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Source:
Civil and Environmental Engineering Reports (CEER), no 32, vol. 2
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License CC BY-NC-ND 3.0:
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Biblioteka Uniwersytetu Zielonogórskiego
Object collections:
- Digital Library of Zielona Góra > Repository > Faculties > Construction department, Architecture and Environmental Engineering
- Digital Library of Zielona Góra > Repository > Types of work > Articles
- Digital Library of Zielona Góra > Repository > Scientific journals and UZ publishing series > Civil and Environmental Engineering Reports (CEER) > Civil and Environmental Engineering Reports (CEER) (2022)
Last modified:
Mar 30, 2023
In our library since:
Mar 30, 2023
Number of object content hits:
84
All available object's versions:
https://zbc.uz.zgora.pl/publication/79974
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Civil and Environmental Engineering Reports (CEER)
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Civil and Environmental Engineering Reports (CEER), no 33 (2023)
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Civil and Environmental Engineering Reports (CEER), no 32 (2022)
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Civil and Environmental Engineering Reports (CEER), no 32, vol. 1 (2022)
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Civil and Environmental Engineering Reports (CEER), no 32, vol. 2 (2022)
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Civil and Environmental Engineering Reports (CEER), no 32, vol. 3 (2022)
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Civil and Environmental Engineering Reports (CEER), no 31 (2021)
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Civil and Environmental Engineering Reports (CEER), no 30 (2020)
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Civil and Environmental Engineering Reports (CEER), no 29 (2019)
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Civil and Environmental Engineering Reports (CEER), no 1 (2005)
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Civil and Environmental Engineering Reports (CEER), no 33 (2023)
| Edition name | Date |
|---|---|
| Reliability-Based Assessment of Galloping Instability of Thin-Walled Steel Beams | Mar 30, 2023 |
