모래지반에서 도넛형 석션기초의 관입 성능 평가를 위한 수치해석 기법에 대한 연구
Study on Numerical Analysis for Penetration Performance Evaluation of Doughnut-Type Suction Foundation in Sand Layer
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
It is difficult to control differential settlement and long-term settlement on soft ground with the template used in the pre-filing method of offshore wind power. In this study, the template adopted a suction foundation with high utility on soft ground. To analyze the penetration performance of the doughnut-type suction foundation, step-by-step numerical analysis was applied by calculating the minimum suction pressure needed for ground penetration at that depth. Scale model tests were performed and compared with the numerical analysis results. The ratio of the inside diameter compared to the outside diameter is higher, and penetration by suction was more advantageous than push-in load penetration. The step-by-step numerical analysis method showed an error within 2 % compared to the model tests, so the numerical analysis method confirmed results that the penetration performance of the doughnut-type suction foundation is valid.
Abstract
It is difficult to control differential settlement and long-term settlement on soft ground with the template used in the pre-filing method of offshore wind power. In this study, the template adopted a suction foundation with high utility on soft ground. To analyze the penetration performance of the doughnut-type suction foundation, step-by-step numerical analysis was applied by calculating the minimum suction pressure needed for ground penetration at that depth. Scale model tests were performed and compared with the numerical analysis results. The ratio of the inside diameter compared to the outside diameter is higher, and penetration by suction was more advantageous than push-in load penetration. The step-by-step numerical analysis method showed an error within 2 % compared to the model tests, so the numerical analysis method confirmed results that the penetration performance of the doughnut-type suction foundation is valid.
참고문헌 (18)
- Achmus, M., "Load-bearing behavior of suction bucket foundations in sand", Applied Ocean Research, 43, pp.157~165 (2013)
- Achmus, M., "Behavior of monopile foundations under cyclic lateral load", Computers and Geotechnics, 36(5), pp.725~735 (2009)
- Benjamin, B., "Analysis of the installation of a series of piles for offshore wind turbine foundations", Master, pp.2014
- Benson, D. J., "An efficient, accurate, simple ale method for non-linear finite-element program", Computer Methods in Applied Mechanics and Engineering, 72(3), pp.305~350 (1989)
- Chen, F., "Large-scale experimental investigation of the installation of suction caissons in silt sand", Appl. Ocean Res, 60, pp.109~120 (2016)
- Erbrich, C. T., "Installation of bucket foundations and suction caissons in sand", Offshore Technology Conference, pp.11~ (1999)
- Ghosh, S., "An Arbitrary Lagrangian-Eulerian finite element method for large deformation analysis of elastic-viscoplastic solids", Computer Methods in Applied Mechanics and Engineering, 86(2), pp.127~188 (1991)
- 한인숙, "사질토 지반에서 석션기초의 관입 거동 고찰을 위한 단계별 수치해석 기법의 적용", 한국연안방재학회지, 2(3), pp.113~118 (2015), (사)한국연안방재학회
- Hogervorst, J. R., "Field trials with large diameter suction piles", Proc. Offshore Technology Conference (1980)
- Houlsby, G. T., "Suction caissons for wind turbines. In:Frontiers in Offshore Geotechnics", ISFOG, pp.75~93 (2005)
- Ibsen, L. B., "Mono-bucket for deutsche bucht, results of 18 years research", danish geotechnical society seminar (2019)
- Le, C. H., "Prototype testing for the partial removal and re-penetration of the mooring dolphin platform with multi-bucket foundations", Mar. Struct, 59, pp.80~93 (2018)[DOI]
- Mehravar, M., "Modelling the variation of suction pressure during caisson installation in sand using FLAC3D", Ships Offshore Struct, 12, pp.893~899 (2017)
- Park, J. S., "Vertical bearing capacity of bucket foundations in sand", Ocean Engineering, 121(1), pp.453~461 (2016)
- Senders, M., "CPTbased method for the installation of suction caissons in sand", J. Geotech. Geo environ Eng. ASCE, pp.14~25 (2009)
- Senpere, D., "Suction anchor piles: a proven alternative to driving or drilling", Proc. Offshore Technology Conference (1982)
- Tjeta, T. I., "Large-scale penetration test at a deepwater site", Offshore Technology Conference, 5103, pp.12~ (1986)
- Tran, M. N., "Variation of suction pressure during caisson installation in sand", Geotechnique, 58(1), pp.1~11 (2008)