Localisation and quantification of stiffness loss based on the forced vibration of a beam traversed by a quarter-car

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Title: Localisation and quantification of stiffness loss based on the forced vibration of a beam traversed by a quarter-car
Authors: Feng, KunGonzález, ArturoCasero, Miguel
Permanent link: http://hdl.handle.net/10197/12144
Date: 2-Jul-2020
Online since: 2021-05-11T12:07:12Z
Abstract: This paper proposes a method for locating and quantifying bridge damage based on the time-varying forced frequencies due to moving traffic. The vehicle-bridge coupled system is simplified using a quarter-car model and a simply supported beam. Eigenvalue analysis shows that the eigenfrequencies of the coupled system vary for different vehicle positions. If a local stiffness loss is introduced, the forced frequencies associated with the ‘damage’ scenario will differ from those of a reference ‘healthy’ scenario. The differences between both scenarios depend on the location and severity of damage as well as on the mass and frequency ratios between quarter-car and beam models. In practice, bridge acceleration due to the crossing of a vehicle can be measured and processed using a time-frequency signal processing tool to obtain instantaneous frequencies. Changes in local stiffness are determined from comparing those instantaneous frequencies with the eigenfrequencies based on the same bridge and vehicle configuration.
Funding Details: Science Foundation Ireland
Type of material: Conference Publication
Publisher: CRC Press
Copyright (published version): 2021 Taylor & Francis
Keywords: Damage detectionVehicle-bridge interactionEigenvalue analysisTransient dynamic analysisShort-term Fourier transformDamage localisationDamage quantificationStructural health monitoringBridge dynamicsLocal stiffness lossMoving loadInstantaneous frequencies
DOI: 10.1201/9780429279119-219
Other versions: https://www.iabmas2020.org/overview.html
Language: en
Status of Item: Peer reviewed
Is part of: Yokota, H. and Frangopol, D.M. (eds.). Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations:Proceedings of the Tenth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2020), June 28-July 2, 2020, Sapporo, Japan
Conference Details: The Tenth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2020), Sapporo, Japan, 28 June -2 July 2020
ISBN: 100017378X
9780429279119
This item is made available under a Creative Commons License: https://creativecommons.org/licenses/by-nc-nd/3.0/ie/
Appears in Collections:Critical Infrastructure Group Research Collection
Earth Institute Research Collection
Civil Engineering Research Collection

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