ESTIMATION BULGING FREQUENCY OF THE REAL SCALE TANK BY MICRO-TREMOR MEASUREMENT AND CALCULATION OF NATURAL FREQUENCY
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- HIRAI Shu
- 中央大学大学院理工学研究科都市人間環境学専攻
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- ONO Taisuke
- (株)エヌ・ワイ・ケイ 設計部
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- HIRANO Hirokazu
- 中央大学 総合政策学部
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- SATO Naotsugu
- 中央大学 理工学部
Bibliographic Information
- Other Title
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- 振動計測と固有振動数解析による実機貯水槽のバルジング固有振動数の推定
Abstract
<p>Bulging is a coupled vibration between tank wall and content fluid. This phenomena is induced by seismic ground motion. In Japan, many cases of water storage tanks due to bulging have been reported with an intensity index over 6. Seismic design against bulging is introduced just at 2022, which will activate various kind of engineer’s interest on it. That is e.g. possibility of phenomena occurrence for existing tanks. In this study, microtremor measurement and natural frequency analysis are conducted to estimate the natural frequencies of the real scale SUS panel tanks, which are considered to have natural frequencies below 10 Hz, the frequency at which bulging damage is expected to occur. As a result, the calculated natural frequency of bulging is consistent with that of the actual tank, indicating the possibility of bulging occurring in the tank. The microtremor measurement method is shown to be particularly effective for SUS panel tanks, which are considered to have natural frequencies below 10 Hz.</p>
Journal
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- Japanese Journal of JSCE
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Japanese Journal of JSCE 80 (15), n/a-, 2024
Japan Society of Civil Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390017843872187904
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- ISSN
- 24366021
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
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- Abstract License Flag
- Disallowed