Investigation on Ultimate Lateral Displacements of Coastal Bridge Piers with Different Corrosion Levels along Height
Publication: Journal of Bridge Engineering
Volume 26, Issue 4
Abstract
Coastal bridges are continually attacked by chloride ions during their lifetime, making the structures vulnerable. Piers, which are the main components of bridge structures to resist lateral forces, are supposed to have adequate deformation capacity to protect the structures from collapse. This paper studies the performance of coastal bridge piers that deteriorate nonuniformly along the height due to varying corrosion characteristics. A prediction method is proposed to estimate the ultimate lateral displacement of coastal bridge piers, and the results of cyclic tests are used to verify the prediction accuracy. Next, the failure mechanism of coastal bridge piers is investigated, taking into account the combined influence of corrosion level and varying performance deteriorations along the height. The analytical results indicate that the sections along the pier height behave differently due to varying corrosion levels when the service time increases, and the maximum damaged position may transfer from the pier bottom to the zone where the performance deteriorates most significantly. In addition, the length proportions between different zones along the pier height strongly affect the seismic failure of coastal bridge piers.
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Acknowledgments
This research is supported by the Scientific Research Fund of Institute of Engineering Mechanics, China Earthquake Administration (Grant No. 2019D08), the National Natural Science Foundation of China (Grant No. 52008186 & 51778206), the National Natural Science Foundation of Jiangsu Province (Grant No. BK20200605), and the National Key Research and Development Program of China (2016YFC0701108). The authors greatly appreciate the financial support.
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Published In
Journal of Bridge Engineering
Volume 26 • Issue 4 • April 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: May 20, 2020
Accepted: Oct 27, 2020
Published online: Jan 29, 2021
Published in print: Apr 1, 2021
Discussion open until: Jun 29, 2021
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