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논문 기본 정보

자료유형
학술저널
저자정보
서민창 (동아대학교) 이시훈 (동아대학교) 김성렬 (동아대학교)
저널정보
한국해양공학회 한국해양공학회지 한국해양공학회지 제28권 제2호
발행연도
2014.4
수록면
133 - 139 (7page)

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초록· 키워드

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Offshore wind turbines have been constructed extensively throughout the world. These turbines are subjected to approximately 10<SUP>8</SUP> horizontal load cycles produced from wind, waves, and current during their lifetimes. Therefore, the accumulated displacement of the foundation under horizontal cyclic loading has significant effects on the foundation design of a wind turbine. Akili(2006) and Achmus et al.(2009) performed cyclic triaxial tests on dry sands and proposed an empirical model for predicting the accumulated plastic strain of sands under long-term cyclic loading. In this study, cyclic triaxial tests were performed to analyze the cyclic loading behaviors of dry sands. A total of 27 test cases were performed by varying three parameters: the relative density of the sands, cyclic load level, and confining stress. The test results showed that the accumulated plastic strain increased with an increase in the cyclic load level and a decrease in the relative density of the sand. The confining stress had less effect on the plastic strain. In addition, the plastic strain at the 1st loading cycle was about 57% of the accumulated strain at 1,000 cycles. Finally, the input parameters of the empirical models of Akili(2006) and Achmus et al.(2009) were evaluated by using the relative density of the sand and the cyclic load level.

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ABSTRACT
1. 서론
2. 모래지반의 강성저하모델
3. 시험계획
4. 실험 결과
5. 실험결과의 분석
6. 결론
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UCI(KEPA) : I410-ECN-0101-2015-550-001446404