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Title |
Influence of fluid height and structure width ratio on the dynamic behavior of fluid in a rectangular structure
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Authors |
박건(Gun Park) ; 윤형철(Hyungchul Yoon) ; 홍기남(Ki Nam Hong) |
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DOI |
https://doi.org/10.11112/jksmi.2020.24.5.126 |
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Keywords |
유체-구조물 상호작용; 유체 출렁임 형상; 출렁임 높이; S.P.H기법; 내진설계 Fluid-Structure interaction; Fluid Fluctuation Shape; Sloshing height; S.P.H method; Seismic Design |
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Abstract |
In the case of an earthquake, the fluid storage structure generates hydraulic pressure due to the fluctuation of the fluid. At this time, the hydraulic pressure of the fluid changes not only the peaked acceleration of the earthquake but also the sloshing height of the fluid free water surface. Factors influencing this change in load include the shape of the seismic wave, the maximum seismic strength, the size of the fluid storage structure, the width of the structure, and the height of the fluid. In this study, the effect of the ratio between the height of the fluid and the width of the structure was investigated on the fluctuation characteristics of the fluid. 200mm and 140mm of fluid were placed in a water storage tank with a width of 500mm, and a real seismic wave was applied to measure the shape of the fluctuation of the fluid free water surface. The similarity between the experiment and the analysis was verified through the S.P.H(Smoothed Particle Hydrodynamic) technique, one of the numerical analysis techniques. It was confirmed that the free water surface of the fluid showed a similar shape, through comparison of experiment and analysis. And based on this results, SPH technique was applied to analyze the fluctuation shape of the fluid free water surface while varying the ratio between the fluid height and the structure width. An equation to predict the maximum and minimum heights of the fluid free water surface during an earthquake was proposed, and it was confirmed that the error between the maximum and minimum heights of the fluid free water surface predicted by the proposed equation was within a maximum of 3%.
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