Bayesian model updating of a large-span steel tied arch bridge: an experimental study
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Bibliographic Details
| Author(s): |
Lanxin Luo
(Department of Bridge Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China)
Huaqiang Zhong (Department of Bridge Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China) Ye Xia (Department of Bridge Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China) Limin Sun 
(State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai, 200092, China)
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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): | 475-480 | ||||
| Total no. of pages: | 6 | ||||
| DOI: | 10.2749/ghent.2021.0475 | ||||
| Abstract: |
In this paper, a large-span steel tied arch bridge's Bayesian FEMU is carried out based on the ambient vibration data. Firstly, the ERA method is used for modal identification. Then, the benchmark FE model of this bridge is established. Based on the sensitivity analysis, six updating parameters significantly affecting the natural frequency are selected. Subsequently, the objective function of the FEMU is established, and the DRAM algorithm is utilized to simulate the parameter samples conforming to the posterior distribution. Finally, the uncertainty analysis of the updated items is carried out. After FEMU, the results show that the model's frequency uncertainty is reduced, and the theoretical frequencies are highly consistent with the identified frequencies. |
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| Keywords: |
MCMC Bayesian FEMU DRAM ambient data Large-span arch bridge
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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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