A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Updating structural properties using vibration-based nondestructive testing with modal parameters
To improve the accuracy of the assessment for existing bridge performance, evaluating up-to-date structural properties is essential. In this paper, we propose a methodology to update the structural properties of a bridge using modal data. Modal data can be easily extracted from a vibration testing conducted on a bridge, making the proposed methodology of practical value. There are three steps in the developed framework for an existing bridge: 1) to build a preliminary finite element model (FEM) based on the bridge design drawings; 2) to update the preliminary FEM to a baseline model using a Bayesian model updating approach with the modal parameters measured from the existing bridge; and 3) to identify local structural stiffness damage using the damage index method with the mode shapes of the existing bridge and of the baseline structure found in the previous step. The proposed framework makes use of the advantages of the Bayesian model updating method and the damage index method, compensating for their drawbacks. Then the proposed framework is illustrated with a simulated finite element model of the Lavic Road Overcrossing bridge, a typical box-girder RC highway bridge in California.
Updating structural properties using vibration-based nondestructive testing with modal parameters
To improve the accuracy of the assessment for existing bridge performance, evaluating up-to-date structural properties is essential. In this paper, we propose a methodology to update the structural properties of a bridge using modal data. Modal data can be easily extracted from a vibration testing conducted on a bridge, making the proposed methodology of practical value. There are three steps in the developed framework for an existing bridge: 1) to build a preliminary finite element model (FEM) based on the bridge design drawings; 2) to update the preliminary FEM to a baseline model using a Bayesian model updating approach with the modal parameters measured from the existing bridge; and 3) to identify local structural stiffness damage using the damage index method with the mode shapes of the existing bridge and of the baseline structure found in the previous step. The proposed framework makes use of the advantages of the Bayesian model updating method and the damage index method, compensating for their drawbacks. Then the proposed framework is illustrated with a simulated finite element model of the Lavic Road Overcrossing bridge, a typical box-girder RC highway bridge in California.
Updating structural properties using vibration-based nondestructive testing with modal parameters
Aktualisierung der strukturellen Eigenschaften mittels Schwingungs basierter zerstörungsfreier Prüfung mit Modalparametern
Huang, Qindan (author) / Gardoni, Paolo (author) / Hurlebaus, Stefan (author)
2009
7 Seiten, 1 Bild, 3 Tabellen, 17 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
Updating Structural Properties using Modal Parameters Considering Measurement Errors
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