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NUMERICAL SIMULATION ON CAISSON BREAKWATER FAILURE DUE TO TSUNAMI OVERTOPPING USING PARTICLE-BASED ELASTOPLASTIC MODEL WITH MODIFICATION OF STRESS BY MLS
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- IKARI Hiroyuki
- 京都大学 工学研究科社会基盤工学専攻
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- GOTOH Hitoshi
- 京都大学 工学研究科社会基盤工学専攻
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- MATSUSHIMA Ryotarou
- 京都大学大学院 工学研究科社会基盤工学専攻
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- NIWA Genki
- 京都大学大学院 工学研究科社会基盤工学専攻
Bibliographic Information
- Other Title
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- MLSによる応力補正を導入した弾塑性粒子法によるケーソン防波堤の津波越流洗掘解析
- MLS ニ ヨル オウリョク ホセイ オ ドウニュウ シタ ダン ソセイ リュウシホウ ニ ヨル ケーソン ボウハテイ ノ ツナミエツリュウ センクツ カイセキ
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Description
In a particle-based elastoplastic model, it is difficult to eliminate numerical noise because of its explicit algorithm. Moving Least Square is one of the method to modify a physical quantity and based on the approximation that it can be described by the Taylor series expansion. In this study, MLS is introduced to modify a stress field that includes numerical noise. Moreover, Particle Shifting is also applied to obtain more accurate stress field. The present model is applied to a numerical simulation on a caisson breakwater failure due to tsunami overtopping. In a series of failure process of a caisson breakwater including a tsunami overtopping, a scouring of mound and soil foundation behind a caission and fall of the caisson into a scour hole, a calculation that stress noise does not emerge clearly is realized.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 74 (2), I_157-I_162, 2018
Japan Society of Civil Engineers