Measuring Dynamic Response of the Wilford Suspension Bridge with a Vision-Based Measurement System: A Case Study

Rolands Kromanis*, Said Elias

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

In this case study the dynamic response of the Wilford suspension bridge is measure using computer vision-based measurement system. The footbridge is subjected to forced excitations, students walking over it, jumping at certain part of it. A modified GoPro action camera with zoom lens is placed approximately 70 m away from the bridge and focused to record videos of multiple targets (hanger to beam connections). Template matching technique is used for the estimation of pixel motions of the targets. Accurate target displacements are derived. They are then used to obtain vibration frequencies and draw the mode shape of the first vertical vibration mode. It is concluded that, although vibration frequencies corresponding to higher vibration modes can be measured, finding the vibration mode shape is difficult with the measurement resolution of 1/10 pixels used in this study.

Original languageEnglish
Title of host publicationEuropean Workshop on Structural Health Monitoring, EWSHM 2022, Volume 1
EditorsPiervincenzo Rizzo, Alberto Milazzo
PublisherSpringer Science + Business Media
Pages280-289
Number of pages10
ISBN (Electronic)978-3-031-07254-3
ISBN (Print)9783031072536
DOIs
Publication statusPublished - 19 Jun 2022
Event10th European Workshop on Structural Health Monitoring, EWSHM 2022 - Palermo, Italy
Duration: 4 Jul 20227 Jul 2022
Conference number: 10

Publication series

NameLecture Notes in Civil Engineering
Volume253 LNCE
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference10th European Workshop on Structural Health Monitoring, EWSHM 2022
Abbreviated title EWSHM 2022
Country/TerritoryItaly
CityPalermo
Period4/07/227/07/22

Keywords

  • Distributed response measurement
  • Dynamic response
  • Forced excitations
  • Suspension bridge
  • Vision-based measurement

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