Measuring Dynamic Response of the Wilford Suspension Bridge with a Vision-Based Measurement System

A Case Study

verfasst von

Rolands Kromanis, Said Elias

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.

Externe Organisation(en)

University of Twente

Typ

Aufsatz in Konferenzband

Seiten

280-289

Anzahl der Seiten

10

Publikationsdatum

2023

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Tief- und Ingenieurbau

Elektronische Version(en)

https://doi.org/10.1007/978-3-031-07254-3_28 (Zugang: Geschlossen)