碩士 / 中原大學 / 土木工程研究所 / 107 / Through the events of the 2004 South Asia tsunami and the 2011 northeastern tsunami in Japan, the problems of the liquefaction, erosion or structural damage caused by the tsunami through the nearshore were discovered. The engineering community''s knowledge of the interaction between tsunami, seabed and structures is still limited. The purpose of this study is to establish a numerical model to analyze the variation of the pore water pressure and the force of the pipeline caused by a solitary wave through the fully buried submarine pipeline.
In this study, a finite element method was used to establish a two-dimensional numerical model to solve the problem of the Biot equation describing the porous elastic bed. The model provides a solution to the displacement of the porous elastic bed and the variation of the pore water pressure. After the model is established, it is verified by simulating a one-dimensional consolidation problem, and the results show the correctness of this mode. By means of numerical simulation, the effects of solitary wave amplitude, Young''s modulus of the soil and permeability coefficient on the pore water pressure and seepage force are discussed. The numerical results can be used as a reference for future marine engineering applications.
In the simulation of solitary waves passing through fully buried submarine pipelines, numerical results indicate that the smaller the permeability coefficient in dense sandy bed the greater the vertical force acting on the pipeline, and the smaller the permeability coefficient in loose sand bed the smaller the vertical force acting on the pipeline. When the permeability coefficient is large, the smaller the Young''s modulus the more obvious the influence of the vertical force on the pipeline, and when the permeability coefficient is small, the larger the Young''s modulus the more obvious the influence of the vertical force on the pipeline.
| Identifer | oai:union.ndltd.org:TW/107CYCU5015005 |
| Date | January 2019 |
| Creators | Li-Jie Wang, 王立傑 |
| Contributors | Meng-Yu Lin, 林孟郁 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 108 |
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