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Structural damage identification for railway bridges based on train-induced bridge responses and sensitivity analysis

Tijdschriftbijdrage - Tijdschriftartikel

A damage identification approach using train-induced responses and sensitivity analysis is proposed for the nondestructive evaluation of railway bridges. The dynamic responses of railway bridges under moving trains composed of multiple vehicles are calculated by a trainbridge dynamic interaction analysis. Using the stiffness variation of the bridge element as an index for damage identification, the sensitivities of train-induced bridge responses to structural damage are analyzed and the sensitivity matrices are formed. By comparing the theoretical measurement responses of one measurement point in two different states, the damage indices of all elements are updated iteratively, and finally the absolute or relative damage is located and quantified. A three-span continuous bridge numerical example proves that the proposed dynamic response sensitivity-based FE model updating damage identification method is not only effective to detect local damage of railway bridges, but also insensitive to the track irregularity and the measurement noise. © 2010 Elsevier Ltd. All rights reserved.
Tijdschrift: Journal of Sound and Vibration
ISSN: 0022-460X
Issue: 4
Volume: 330
Pagina's: 757 - 770
Jaar van publicatie:2011
BOF-keylabel:ja
IOF-keylabel:ja
BOF-publication weight:1
CSS-citation score:2
Auteurs:International
Authors from:Higher Education