土木学会論文集B2(海岸工学)
Online ISSN : 1883-8944
Print ISSN : 1884-2399
津波の越流に伴う混成堤ケーソンの挙動とその機構に関する数値解析
中村 友昭安藤 康平山田 裕貴水谷 法美小竹 康夫
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キーワード: ケーソン, 津波, 転倒, 数値解析
ジャーナル フリー

2012 年 68 巻 2 号 p. I_831-I_835

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The failure mechanism of a caisson on a rubble mound due to tsunami overflow is investigated using a coupled fluid-structure interaction model. Numerical results show that the predictive capability of the model is demonstrated against experimental data in terms of water surface elevation, wave pressure acting on the caisson, and the motion of the caisson. It is also revealed that the caisson can be overturned because there is a lag in an increase in wave force acting on the landward surface of the caisson behind an elevation in the water surface because of the formulation of large-scale vortices caused by the overflow over the caisson and the seepage flow inside the mound. Furthermore, it is found that an improvement of the permeability of the mound can be effective to prevent the overturning of the caisson.

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© 2012 公益社団法人 土木学会
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