碩士 / 國立臺灣海洋大學 / 河海工程學系 / 103 / Taiwan is located in the circum-Pacific seismic belt, making the safety design of offshore wind turbine structures in Taiwan in their lifespan subject to earthquakes, sea tide, extreme waves, tsunamis, the failure of the seabed soil is more difficult than those in other countries. Accordingly, the stability of the seabed soil and the coupling effects of seabed soil and wind turbine foundation play an crucial role.
In Taiwan, the wind farm site is mostly seabed sediments in the western waters shore. The soil is mainly sand and clay inter-layered and sea-bed sediments are generally very soft. Because the consideration of economic design of offshore structures over the lifespan mainly depends on the seabed soil stability for the interaction of foundation and soil subjected to earthquake, this study presents the numerical modeling of the jacket foundation for the offshore wind farm using the effective stress analysis with the consideration of the pore pressure generation and soil/liquid coupled analysis. A comprehensive study was conducted to evaluate the design of offshore wind turbine foundation in the sand and clay inter-layered soil.
Results obtained demonstrate that the design process for the jacket foundation proposed in this study can properly reflect the interaction behavior of foundation and soil. In addition, the pore pressure generation model can be used to simulate the soil liquefaction. The proposed method can also be very useful to enhance the knowledge of the design capability for the foundation of offshore structures.
| Identifer | oai:union.ndltd.org:TW/103NTOU5192024 |
| Date | January 2015 |
| Creators | Yu, Meng-Hsun, 余孟勳 |
| Contributors | Ku, Cheng-Yu, 顧承宇 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 106 |
Page generated in 0.0114 seconds