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Ocean Systems Engineering Volume 14, Number 2, June 2024 , pages 157-169 DOI: https://doi.org/10.12989/ose.2024.14.2.157 |
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Finding the optimum shape of the energy dissipator to minimize the impact force due to the dam break flow |
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Asrini Chrysanti and Sangyoung Son
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| Abstract | ||
| The sudden release of water from a dam failure can trigger bores on a flat surface and exert substantial impact forces on structures. This flow poses a high-risk flood hazard to downstream urban areas, making it imperative to study its impact on structures and devise effective energy dissipators to mitigate its force. In this study, a combination of Genetic Algorithm optimization and numerical modeling is employed to identify the optimal energy dissipator. The analysis reveals that a round arc-shaped structure proves most effective, followed by a triangular shape. These shapes offer wide adaptability in terms of structure dimensions. Structures with higher elevation, especially those with round or triangular shapes, demonstrate superior energy dissipation capabilities. Conversely, square-shaped structures necessitate minimal height to minimize impact forces. The optimal width for dissipating energy is found to be 0.9 meters, allowing for effective wave run-up and propagation. Furthermore, the force exerted on structures increases with higher initial water levels, but diminishes with distance from the dam, highlighting the importance of placement in mitigating impact forces. | ||
| Key Words | ||
| dam break; energy dissipator; genetic algorithm; lateral force; optimization; structure shape | ||
| Address | ||
| Asrini Chrysanti: Graduate School of Water Resources Management, Faculty of Civil and Environmental Engineering, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung 40132, West Java, Indonesia Sangyoung Son: School of Civil, Environmental, and Architectural Engineering, Korea University, 45 Anam-ro, Seongbuk-gu, Seoul 02841, South Korea | ||
