Estimation of transitory changes in bending stiffness using the Hilbert-Huang transform

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Title: Estimation of transitory changes in bending stiffness using the Hilbert-Huang transform
Authors: González, ArturoAied, Hussein
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Date: 31-Dec-2019
Online since: 2020-08-27T12:00:44Z
Abstract: A finite element model of a bridge can be calibrated based on field measurements, and then updated periodically using a structural health monitoring system. The value of a structural parameter such as bending stiffness can be adjusted to measurements using well-known modal updating techniques and monitored in conjunction with external effects such as temperature to assess the condition of the structure. A value of the parameter that is predominant during the period under investigation will be captured, however, in the case of bending stiffness, brief and transitory values could take place as a result of a section exceeding the yield point due to a moving traffic load. Given that the latter is probably the prelude of more severe damage, this paper proposes a novel two-stage method based on the Hilbert-Huang transform combined with a statistical optimization approach to characterize the stiffness changes associated with a non-linear response.
Funding Details: University College Dublin
metadata.dc.description.othersponsorship: Output-Based Research Support Scheme (OBRSS)
Type of material: Journal Article
Publisher: IOS Press
Journal: Bridge Structures
Volume: 15
Issue: 4
Start page: 161
End page: 180
Copyright (published version): 2019 the Authors
Keywords: Hilbert-Huang transformStiffness characterizationCross-entropyBayesian updatingStructural health monitoringNon-linear structural responseMoving loadAccelerations
DOI: 10.3233/brs-190163
Language: en
Status of Item: Peer reviewed
Appears in Collections:Critical Infrastructure Group Research Collection
Earth Institute Research Collection
Civil Engineering Research Collection

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