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Uncertainty Quantification and Calibration of Dynamic Models of Existing Bridges Considering Difference of Modeling Strategy

 Uncertainty Quantification and Calibration of Dynamic Models of Existing Bridges Considering Difference of Modeling Strategy
Autor(en): ,
Beitrag für IABSE Conference: Elegance in structures, Nara, Japan, 13-15 May 2015, veröffentlicht in , S. 236-237
DOI: 10.2749/222137815815774764
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This study presents one of strategies to deal with the uncertainties in the Model Verification and Validation (V&V) for the modeling of existing structures by applying the Bayesian uncertainty quan...
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Bibliografische Angaben

Autor(en):

Medium: Tagungsbeitrag
Sprache(n): Englisch
Tagung: IABSE Conference: Elegance in structures, Nara, Japan, 13-15 May 2015
Veröffentlicht in:
Seite(n): 236-237 Anzahl der Seiten (im PDF): 8
Seite(n): 236-237
Anzahl der Seiten (im PDF): 8
Jahr: 2015
DOI: 10.2749/222137815815774764
Abstrakt:

This study presents one of strategies to deal with the uncertainties in the Model Verification and Validation (V&V) for the modeling of existing structures by applying the Bayesian uncertainty quantification (UQ) and the model calibration. Authors especially verified how the uncertain model parameters could be calibrated in different modeling strategies that must be determined by a person who were making the model based on the purpose of the numerical analysis. The target bridge was an existing seismic isolated bridge, and compared the performances of the UQ and the calibration between two finite element (FE) models; a detail and a frame models, using measured dynamic characteristics. It was then shown that the performance of UQ varied with the difference of the modeling because descriptions of model parameters and their prior uncertainties were different.

Furthermore, the results indicated some requirements in the nominal modeling of the structure for appropriate Model V&V.

Stichwörter:
Finite-Elemente-Modell