The dynamic assessment of structural condition by measurement error-minimizing observability method
Visualitza/Obre
30537811p.pdf (514,9Kb) (Accés restringit)
Sol·licita una còpia a l'autor
Què és aquest botó?
Aquest botó permet demanar una còpia d'un document restringit a l'autor. Es mostra quan:
- Disposem del correu electrònic de l'autor
- El document té una mida inferior a 20 Mb
- Es tracta d'un document d'accés restringit per decisió de l'autor o d'un document d'accés restringit per política de l'editorial
Cita com:
hdl:2117/339444
Tipus de documentText en actes de congrés
Data publicació2020
EditorCRC Press
Condicions d'accésAccés restringit per política de l'editorial
Tots els drets reservats. Aquesta obra està protegida pels drets de propietat intel·lectual i
industrial corresponents. Sense perjudici de les exempcions legals existents, queda prohibida la seva
reproducció, distribució, comunicació pública o transformació sense l'autorització del titular dels drets
ProjecteMODELOS ESTRUCTURALES PARA LA GESTION EFICIENTE DE INFRAESTRUCTURAS: SMART BIM MODELS (AEI-BIA2017-86811-C2-1-R)
SISTEMA DE APOYO A LA TOMA DE DECISIONES DURANTE EL CICLO DE VIDA DE LAS INFRAESTRUCTURAS: SMART-INFRASTRUCTURES (MINECO-BIA2013-47290-R)
SISTEMA DE APOYO A LA TOMA DE DECISIONES DURANTE EL CICLO DE VIDA DE LAS INFRAESTRUCTURAS: SMART-INFRASTRUCTURES (MINECO-BIA2013-47290-R)
Abstract
The structural identification using dynamic parameters (such as the natural vibration frequencies and mode shapes of the structure) is an important issue especially in slender structures such as long-span bridges or high-rise buildings. It is the most popular way to assess the structural condition along the service life . This article presents a new approach, under the framework of Structural System Identificaction by Observability Method (OM), to perform the structural system identification. The method is able of determining which actual structural properties (like Young’s modulus, area, inertia, mass) can be uniquely detected when an appropriate subset of mode-shapes and frequencies of the whole structure is provided. Error-Minimizing Observability Method (EMOM), which separates and merges the error items included in frequencies and mode shapes, is used to get an accurate estimate of element properties. A key issue in this method is how to choose the weight factor of frequencies and mode-shapes, when minimizing the objective function. This is still an unsolved problem and will pose a big influence on the results. Hence, a 2-dof example is illustrated in the paper dealing with this issue. . From the analysis of frequencies and mode-shapes with the best weight factor, it is found that through the fine calculation, the weight factor produced by the Bayesian method fits well with the one derived with the regular one-by-one calculation. This provides a criteria to choose the weight factor directly from the experimental samples by the Bayesian approach, thus decreasing the complexity and the computing time.
CitacióPeng, T.; Casas, J.; Turmo, J. The dynamic assessment of structural condition by measurement error-minimizing observability method. A: International Symposium on Life-Cycle Civil Engineering. "Life-Cycle Civil Engineering: Innovation, Theory and Practice: Proceedings of the 7th International Symposium on Life-Cycle Civil Engineering (IALCCE 2020), October 27-30, 2020, Shanghai, China". CRC Press, 2020, p. 1381-1387. ISBN 9780367360191. DOI 10.1201/9780429343292-183.
ISBN9780367360191
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
30537811p.pdf | 514,9Kb | Accés restringit |