Shaking Table Tests of Post-Tensioned Rocking Bridge with Double-Column Bents
Publication: Journal of Bridge Engineering
Volume 24, Issue 8
Abstract
Rocking piers can limit the seismic damage and residual displacement under strong earthquakes to maintain the post-earthquake serviceability of bridges. This article presents an experimental study on the seismic response and rocking isolation of a bridge with post-tensioned rocking piers exhibiting negative rocking stiffness. A 1/10 scaled single-span bridge was precast and tested on a shaking table. The experimental results show that appropriately designed unbonded tendons can enhance the seismic stability of rocking bridges without serious loss of isolation efficiency. The bridge model presented excellent post-earthquake resilience with negligible residual displacement and damage due to enhanced rocking interfaces. In addition, a larger section depth of the columns rendered ample stability but weaker isolation efficiency.
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Acknowledgments
This research was jointly funded by the National Natural Science Foundation of China (Grants 51421005, 51838010, and 51678013), Beijing Municipal Education Commission (IDHT20190504) and the Beijing Natural Science Foundation (Grant 8162007). This financial support is gratefully acknowledged. The results and conclusions presented in the article are those of the authors and do not necessarily reflect the view of the sponsors.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 24 • Issue 8 • August 2019
Copyright
© 2019 American Society of Civil Engineers.
History
Received: Sep 28, 2018
Accepted: Mar 25, 2019
Published online: May 20, 2019
Published in print: Aug 1, 2019
Discussion open until: Oct 20, 2019
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