Field Observation of Global and Local Dynamics of a Cable-Stayed Bridge

Jasna Bogunović Jakobsen*, Jónas þór Snæbjörnsson, Nicolo Daniotti

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

This work examines dynamic characteristics of a cable-stayed bridge, utilizing acceleration data from the bridge deck as well as the cables. A weather station installed on the bridge provides additional data for the interpretation of the observed wind and traffic induced vibrations. The measurement data are acquired on the Stavanger City Bridge. The bridge layout, combining steel and concrete girder segments supported by a tower and stay cables, makes it an interesting case for system identification analysis especially as all three parts of the bridge structured are monitored to some extent. Especially as cable vibration sensors are rarely included in long-term wind and structural health monitoring of the cable-stayed bridges. The data analysis investigates the characteristics of the suspended steel box and the supporting concrete girder, synchronization in response between the different structural components and the interaction between deck vibrations and cable vibrations. The paper explores the performance of system identification techniques for estimation of damping, which is challenging for damping levels as low as 0.05%, such as in the case of the stay cables. It is found that there is a strong interaction between the cables and the deck structure. Detailed identification of the cable properties showed a clear dependency between the total cable damping and the wind velocity, revealing the contribution of aerodynamic damping.

Original languageEnglish
Title of host publicationDynamics and Aerodynamics of Cables - ISDAC 2023
EditorsVincenzo Gattulli, Marco Lepidi, Luca Martinelli
PublisherSpringer Science and Business Media Deutschland GmbH
Pages61-72
Number of pages12
ISBN (Electronic)978-3-031-47152-0
ISBN (Print)9783031471513
DOIs
Publication statusPublished - 18 Jan 2024
Event3rd International Symposium on Dynamics and Aerodynamics of Cables, ISDAC 2023 - Rome, Italy
Duration: 15 Jun 202317 Jun 2023

Publication series

NameLecture Notes in Civil Engineering
Volume399
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference3rd International Symposium on Dynamics and Aerodynamics of Cables, ISDAC 2023
Country/TerritoryItaly
CityRome
Period15/06/2317/06/23

Bibliographical note

Publisher Copyright:
© 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Other keywords

  • Acceleration
  • Cable-stayed bridge
  • Damping
  • System identification
  • Vibrations

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