Centrifugal Model Study of Seepage and Seismic Behavior in a Homogeneous Reservoir Dam with Parapet
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Published:2023-05-22
Issue:10
Volume:13
Page:6347
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ISSN:2076-3417
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Container-title:Applied Sciences
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language:en
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Short-container-title:Applied Sciences
Author:
Lee Young-Hak1ORCID, Yamakawa Soichiro2, Tobita Tetsuo3, Hong Hyuk-Kee3, Song Hyo-Sung1ORCID, Kim Jae-Jung1, Lee Dal-Won4ORCID
Affiliation:
1. National Disaster Management Research Institute, Ulsan 44538, Republic of Korea 2. Kiso-Jiban Consultants Co., Ltd., Tokyo 136-8577, Japan 3. Faculty of Environmental and Urban Engineering, Department of Civil, Environmental and Applied System Engineering, Kansai University, Osaka 564-8680, Japan 4. Department of Agricultural and Rural Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
Abstract
This study examines the effectiveness of parapets in preventing overtopping failures of small-scale homogeneous reservoir dams under seismic loads. In this study, a parapet covered the entire width of the dam crest and was designed to ensure its weight is transmitted to the dam crest. The test included four modes: initial mode, first seepage, seismic, and second seepage. The results show that without parapets the crack length and width expand significantly in the dam crest during the seismic mode, and the effect was large in the second seepage mode. The crack depth increased by 11.3–24 times during the seismic mode and expanded up to 73.3% of the dam height in the longitudinal direction along the axis of the crack formed in the dam crest during the second seepage mode. These findings suggest that the earthquake weakened the dam body, making it vulnerable to penetration. In contrast, the parapet structure effectively suppressed most of the tensile cracks by increasing the constraint force. Additionally, no crack expansion or tearing occurred during the second seepage mode post-earthquake, indicating improved seismic performance and suppression of seepage deformation.
Funder
National Disaster Management Research Institute National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT and Future Planning of the South Korean Government
Subject
Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science
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