Effect of Temperature on Modal Variability of a Curved Concrete Bridge under Ambient Loads
Publication: Journal of Structural Engineering
Volume 133, Issue 12
Abstract
This paper reports on the effect of temperature on the modal properties for a curved posttensioned bridge. The goal has been to explore how ambient vibrations based on routine traffic excitation can be used as part of a long-term bridge monitoring approach. This requires the establishment of a baseline that incorporates the sensitivity of the measured modal properties. The ambient vibration characteristics are based on both the health of the structure and the environmental and operational conditions which may mask normal changes due to structural changes. The primary environmental influence on the structural modal properties is temperature. A database developed over a period to explore bridge monitoring techniques has been used to evaluate how temperature variations influence the modal properties. The results show that the variability of measured modal parameters due to temperature should be well understood and quantified prior to the establishment of a baseline for use in damage assessment algorithms.
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Acknowledgments
The bridge monitoring work at the University of Connecticut has been a joint effort between the University and the Connecticut Department of Transportation, Division of Research. The work described in this paper has been sponsored by the Connecticut Department of Transportation and the U.S. Department of Transportation, Federal Highway Administration. The support of the Connecticut Transportation Institute at the University of Connecticut is gratefully acknowledged.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 133 • Issue 12 • December 2007
Pages: 1742 - 1751
Copyright
© 2007 ASCE.
History
Received: Apr 27, 2006
Accepted: Apr 30, 2007
Published online: Dec 1, 2007
Published in print: Dec 2007
Notes
Note. Associate Editor: Ahmet Emin Aktan
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