Dynamic Centrifuge Experimental Study on Dam–Reservoir Interaction in Concrete-Face Rockfill Dams under Earthquake Loading
Publication: International Journal of Geomechanics
Volume 23, Issue 12
Abstract
With the advancement of water conservancy projects around the world, several concrete-face rockfill dams (CFRDs) are being built in earthquake-prone areas. Among the many factors affecting the seismic safety of a CFRD, the dam–reservoir interaction is the most important one. Dam–reservoir interaction impacts the dynamic response and deformation of the dam and further influences the behavior of the face slab. This study conducted two centrifuge experiments to analyze the influence of dam–reservoir interaction on the behavior of a CFRD. Experimental models of concrete-face slab rockfill dams with and without an impoundment in four earthquake cases were established. In particular, a bidirectional earthquake motion was considered. The acceleration response and the settlement of the dam crest, bending moment and axial force of the facing slab, and the hydrodynamic pressure on the upstream slope of the dam were analyzed. The results showed that the dam–reservoir interaction increases the acceleration amplitude but decreases the progression of the dam crest settlement, enhances the dynamic axial force near the base, and reduces the bending moment near the dam crest of the face slab. Furthermore, the hydrodynamic pressure had a positive correlation with the dynamic axial force of the face slab.
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Data Availability Statement
All data, models, and codes generated or used during the study appear in the published article.
Acknowledgments
The authors from Xi’an University of Technology and the China Institute of Water Resources and Hydropower Research prepared this study with the financial support of the National Natural Science Foundation of China (No. 52078212), the State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research (No. IWHR-SKL-202003). Key Research and Development Projects of Tibet Autonomous Region (XZ202101ZY0002G), Open Research Fund Program of State Key Laboratory of Hydroscience and Engineering (sklhse-2021-D-05), and the National Natural Science Foundation of China (51809290). The authors would like to thank all reviewers who participated in the review, as well as MJEditor (www.mjeditor.com), for providing English editing services during the preparation of this manuscript.
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Published In
International Journal of Geomechanics
Volume 23 • Issue 12 • December 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Mar 24, 2022
Accepted: Mar 22, 2023
Published online: Sep 26, 2023
Published in print: Dec 1, 2023
Discussion open until: Feb 26, 2024
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