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Temperature Effects on the Modal Properties of a Suspension Bridge

  • Etienne CheynetEmail author
  • Jonas Snæbjörnsson
  • Jasna Bogunović Jakobsen
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

The paper studies temperature effects on the modal parameters of a suspension bridge across a Norwegian fjord. The approach used is a full-scale ambient vibration testing, where an automated Covariance-Driven Stochastic Subspace Identification (SSI-COV) method is used to identify the modal parameters. The bridge site, the bridge structure and the monitoring system are presented, followed by a summary of the data analysis procedure and the parameters used for the automated SSI-COV method applied. The operational modal analysis is based on 6 months of continuous acceleration records providing seasonal and diurnal variations of the natural frequencies of the bridge and the modal damping ratios. Temperature effects were observed with details that are scarcely available in the literature. In particular, the pronounced daily fluctuations of natural frequencies and seasonal effects are documented.

Keywords

Suspension bridge Full-scale Ambient vibrations Modal parameters Temperature effects 

Notes

Acknowledgment

The authors are grateful to the Norwegian Public Road Administration for the support of and the assistance during the measurement campaign at the Lysefjord Bridge.

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Copyright information

© The Society for Experimental Mechanics, Inc. 2017

Authors and Affiliations

  • Etienne Cheynet
    • 1
    Email author
  • Jonas Snæbjörnsson
    • 1
    • 2
  • Jasna Bogunović Jakobsen
    • 1
  1. 1.Department of Mechanical and Structural Engineering and Materials ScienceUniversity of StavangerStavangerNorway
  2. 2.School of Science and EngineeringReykjavik UniversityReykjavíkIceland

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