Abstract
Dams play a crucial role in water resource management, but the risk of failures requires a thorough safety evaluation. Earthquakes, among other factors, can contribute to dam failures, emphasizing the importance of securing the safety of both the dam and its associated structures against future earthquakes. While existing specification codes offer design ideas for seismic safety, dam-relevant structures have not received sufficient attention. This study focuses on the seismic analysis of the spillway and radial gate in Northern Thailand. The seismic behaviors of these structures are investigated using the finite element method, employing Nonlinear Response History Analyses to explore their seismic responses. Input ground motions for the analysis adhere to Thailand seismic design standard (DPT1301/1302-61), considering the Maximum Considered Earthquake (MCE). The results affirm that both the spillway and gate meet established safety standards, satisfying the prescribed criteria. Minimal damage is visible in the lower control bridge’s pier. Radial gate stresses and deformations meet criteria, but stress is high in locally stiffened areas, and deformation is significant at unsupported points. Outcomes provide valuable insights, significantly contributing to the seismic safety analysis of the spillway and radial gate. These complex and unique findings emphasize the significance of implementing tailored measures to ensure the structural integrity, safety, and resilience of dam-related structures.
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Acknowledgments
This work was supported by the Higher Education Commission and the Thailand Research Fund (MRG6080109) and the Faculty of Engineering, Chiang Mai University RA Scholarship Scheme under Grant No. RA/03/2562. In addition, the High-Performance Computing facility was supported by Erawan HPC Project, Information Technology Service Center (ITSC), Chiang Mai University, Chiang Mai, Thailand. The authors extend their sincere thanks to Professor Dr. Nakhorn Poovarodom of Thammasat University and Mr. Nattapon Maktheppong for their invaluable assistance in conducting ambient vibration measurements of the Kew Kho Ma Dam spillway. Special thanks are also extended to Associate Professor Dr. Suttisak Soralump of Kasetsart University for his contributions to this research paper.
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Kanthakasikam, R., Charatpangoon, B., Hansapinyo, C. et al. Seismic Safety Analysis of Dam Appurtenant Structures in Northern Thailand. KSCE J Civ Eng (2024). https://doi.org/10.1007/s12205-024-1421-9
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DOI: https://doi.org/10.1007/s12205-024-1421-9