수치해석을 이용한 그룹형 석션파일의 수평방향 지지거동 분석 = Horizontal Bearing Behavior of Group Suction Piles by Numerical Analysis

다국어 초록 (Multilingual Abstract)

Recently, several researches on the development of new economical foundation types have been performed to supportfloating structures as many offshore structures have been constructed. This study focused on the evaluation of bearingcapacity of group suction piles, which are connected by a concrete pile cap. The offshore floating structures are mainlysubjected to horizontal loading, so the horizontal bearing capacities of the group suction piles were analyzed by performing3-dimensional finite element analyses. The group suction piles are expected to behave as a rigid pile due to its shallowembedded depth. Therefore, the detailed soil modeling was necessary to simulate the bearing behavior of soils underlow confining pressure. The modulus and the strength of soils were modelled to increase with effective confining pressurein soils. For the parametric study, the center-to-center spacing between piles was varied and two soil types of clayand sands were applied. The analyses results showed that the yielding load of the group pile increased with the increaseof the pile spacing and the yielding load of the group piles with 5D spacing was about 3 times larger than that ofthe single pile with free rotation.

참고문헌 (Reference)

1 김성렬, "점성토 지반에 설치된 Tripod 버켓기초의 지지거동 분석" 대한토목학회 32 (32): 105-111, 2012

2 Houlsby, G. T, "Undrained bearing capacity factors for conical footing on clay" 53 (53): 513-520, 2003

3 Yun, G., "The undrained vertical bearing capacity of skirted foundations in undrained soil" 47 (47): 493-506, 2007

4 Andersen, K. H., "Suction anchors for deepwater applications, Keynote Lecture" 3-30, 2005

5 Janbu, N., "Soil compressibility as determined by oedometer and triaxial test" 1 : 19-25, 1963

6 Bransby, M. F, "Shallow foundation subject to combined loadings" 3 : 1947-1952, 1997

7 Taiebat H. A, "Numerical studies of the bearing capacity of shallow foundations on cohesive soil subjected to combined loading" 50 (50): 409-418, 2000

8 Mosallanezhad, M., "Experimental study of bearing capacity of granular soils, reinforced with innovative grid-anchor system" 26 : 299-312, 2008

9 Hung, L. C, "Evaluation of vertical and horizontal bearing capacities of bucket foundations in clay" 52 : 75-82, 2012

10 KICT, "Development of novel technologies for low-cost and high-efficiency suction piles(II)" KICT 53-56, 2011

11 KICT, "Development of construction technology for concrete floated offshore infrastructures" KICT 3-8, 2008

12 Broms, B., "Design of Laterally Loaded Piles" 91 (91): 79-99, 1964

13 Randolph, M. F., "Challenges of offshore geotechnical engineering" 1 : 123-176, 2005

14 Colliat, J. L., "Caisson Foundations as Alternative Anchors for Permanent Mooring of a Process Barge Offshore Congo" 7797 : 919-929, 1995

15 Simulia, "Abaqus user’s Manual" Dassault Systèmes Simulia Corp 2010