Nikitas, N orcid.org/0000-0002-6243-052X, Macdonald, JHG and Jakobsen, JB (2011) Identification of flutter derivatives from full-scale ambient vibration measurements of the Clifton Suspension Bridge. Wind and Structures, 14 (3). pp. 221-238. ISSN 1226-6116
Abstract
The estimated response of large-scale engineering structures to severe wind loads is prone to modelling uncertainties that can only ultimately be assessed by full-scale testing. To this end ambient vibration data from full-scale monitoring of the historic Clifton Suspension Bridge has been analysed using a combination of a frequency domain system identification method and a more elaborate stochastic identification technique. There is evidence of incipient coupling action between the first vertical and torsional modes in strong winds, providing unique full-scale data and making this an interesting case study. Flutter derivative estimation, which has rarely previously been attempted on full-scale data, was performed to provide deeper insight into the bridge aerodynamic behaviour, identifying trends towards flutter at higher wind speeds. It is shown that, as for other early suspension bridges with bluff crosssections, single-degree-of-freedom flutter could potentially occur at wind speeds somewhat below requirements for modern designs. The analysis also demonstrates the viability of system identification techniques for extracting valuable results from full-scale data.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2011, Techno-Press Ltd. This is an author produced version of a paper published in Wind and Structures. |
Keywords: | full-scale; system identification; ambient vibration data; flutter derivatives |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) > Institute for Resilient Infrastructure (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 01 Aug 2016 08:21 |
Last Modified: | 01 Jul 2017 03:54 |
Published Version: | http://dx.doi.org/10.12989/was.2011.14.3.221 |
Status: | Published |
Publisher: | Techno Press |
Identification Number: | 10.12989/was.2011.14.3.221 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:99222 |