000013214 001__ 13214
000013214 005__ 20161114160332.0
000013214 04107 $$aeng
000013214 046__ $$k2009-06-22
000013214 100__ $$aPanetsos, P.
000013214 24500 $$aIdentification of dynamic models of metsovo (greece) bridge using ambient vibration measurements

000013214 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013214 260__ $$bNational Technical University of Athens, 2009
000013214 506__ $$arestricted
000013214 520__ $$2eng$$aAvailable methods for structural model updating are employed to develop high fidelity models of the Metsovo bridge using ambient vibration measurements. The Metsovo bridge, the highest bridge of the Egnatia Odos Motorway, is a two-branch balanced cantilever ravine bridge. It has a total length of 357m, a very long central span of 235m, and a height of 110m for the taller pier. Ambient vibration measurements are available during different construction phases of the bridge. Operational modal analysis software is used to obtain the modal characteristics of the bridge. The modal characteristics are then used to update two model classes of finite element models of the bridge. These model classes are based on beam and solid elements. A multi-objective structural identification method is used for estimating the parameters of the finite element structural models based on minimising the modal residuals. The method results in multiple Pareto optimal structural models that are consistent with the measured modal data and the modal residuals used to measure the discrepancies between the measured modal values and the modal values predicted by the model. Single objective structural identification methods are also evaluated as special cases of the proposed multi-objective identification method. The effectiveness of the updated models from the two model classes and their predictive capabilities are assessed. It is demonstrated that the Pareto optimal structural models may vary considerably, depending on the fidelity of the model classes employed and the size of measurement errors.

000013214 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013214 653__ $$aBridges, Model Updating, Structural Identification, Multi-Objective Optimization, Structural Dynamics. Abstract. Available methods for structural model updating are employed to develop high fidelity models of the Metsovo bridge using ambient vibration measurements. The Metsovo bridge, the highest bridge of the Egnatia Odos Motorway, is a two-branch balanced cantilever ravine bridge. It has a total length of 357m, a very long central span of 235m, and a height of 110m for the taller pier. Ambient vibration measurements are available during different construction phases of the bridge. Operational modal analysis software is used to obtain the modal characteristics of the bridge. The modal characteristics are then used to update two model classes of finite element models of the bridge. These model classes are based on beam and solid elements. A multi-objective structural identification method is used for estimating the parameters of the finite element structural models based on minimising the modal residuals. The method results in multiple Pareto optimal structural models that are consistent with the measured modal data and the modal residuals used to measure the discrepancies between the measured modal values and the modal values predicted by the model. Single objective structural identification methods are also evaluated as special cases of the proposed multi-objective identification method. The effectiveness of the updated models from the two model classes and their predictive capabilities are assessed. It is demonstrated that the Pareto optimal structural models may vary considerably, depending on the fidelity of the model classes employed and the size of measurement errors.

000013214 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013214 720__ $$aPanetsos, P.$$iNtotsios, E.$$iLiokos, N.$$iPapadimitriou, C.
000013214 8560_ $$ffischerc@itam.cas.cz
000013214 8564_ $$s855705$$uhttps://invenio.itam.cas.cz/record/13214/files/CD295.pdf$$yOriginal version of the author's contribution as presented on CD, section: Inverse problems and system identification.
000013214 962__ $$r13074
000013214 980__ $$aPAPER