Modelling and testing of a historic steel suspension footbridge in Ireland

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Title: Modelling and testing of a historic steel suspension footbridge in Ireland
Authors: O'Donnell, Deirdre
Wright, Robert
O'Byrne, Michael
Cahill, Paul
Pakrashi, Vikram
et al.
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Date: 1-Jun-2017
Online since: 2019-05-08T11:19:26Z
Abstract: Daly’s Bridge is a historic steel suspension footbridge in Ireland, known locally as the ‘Shaky Bridge’ for its noticeable movement under pedestrian loading. While there is concern regarding the performance of the structure, testing or modelling have not been carried out till date and inadequate information exist in relation to carrying out such analyses. In this paper, Daly’s bridge is instrumented and tested for the first time and a model of the bridge is established and improved in the process. Apart from ambient vibration, excitation from traversing pedestrians and cyclists is considered. Video analysis of dynamic deflection, a wavelet packet based technique using acceleration responses and dynamic measurements from a cheap smartphone accelerometer application are used to identify and compare the natural frequency of the bridge. The work contributes to the evidence base of full-scale measurements of instrumenting and analysing responses of aging pedestrian bridges highlighting the complexity, challenges, opportunities and limitations related to varied levels of information available from disparate sources . The study also highlights the need of investigating to what extent cheap sensors can be successfully used as compared to their more expensive and sophisticated counterpart.
Type of material: Conference Publication
Publisher: ICE Publishing
Volume: 170
Issue: 2
Start page: 116
End page: 132
Copyright (published version): 2017 ICE Publishing
Keywords: BridgesField testing and monitoringMaintenance and inspection
DOI: 10.1680/jbren.15.00047
Language: en
Status of Item: Not peer reviewed
Is part of: Proceedings of the Institution of Civil Engineers: Bridge Engineering
Appears in Collections:Mechanical & Materials Engineering Research Collection

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