Browse > Article
http://dx.doi.org/10.12814/jkgss.2015.14.1.001

Development of Nonlinear Spring Modeling Technique of Group Suction Piles in Clay  

Lee, Si-Hoon (Department of Civil Engineering, Dong-A University)
Lee, Ju-Hyung (Geotechnical Engineering Research Division, KICT)
Tran, Xuan Nghiem (Department of Civil Engineering, Dong-A University)
Kim, Sung-Ryul (Department of Civil Engineering, Dong-A University)
Publication Information
Journal of the Korean Geosynthetics Society / v.14, no.1, 2015 , pp. 1-10 More about this Journal
Abstract
Recently, several researches on the development of new economical anchor systems have been performed to support floating structures. This study focused on the group suction piles, which connect mid-sized suction piles instead of a single suction pile with large-diameter. The group suction pile shows the complex bearing behavior with translation and rotation, so it is difficult to apply conventional design methods. Therefore, the numerical modeling technique was developed to evaluate the horizontal bearing capacity of the group suction piles in clay. The technique models suction piles as beam elements and soil reaction as non-linear springs. To analyze the applicability of the modeling, the horizontal load-movement curves of the proposed modeling were compared with those of three-dimensional finite element analyses. The comparison showed that the modeling underestimates the capacity and overestimate the displacement corresponding to the maximum capacity. Therefore, the correction factors for the horizontal soil resistance was proposed to match the bearing capacity from the three-dimensional finite element analyses.
Keywords
Suction pile; Group pile; Bearing capacity; Numerical analysis; Floating structure;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Abdel-Rahman, K. and Achmus, M. (2005), "Finite element modeling of horizontally loaded monopile foundations for offshore wind energy converters in Germany," Frontiers in Offshore Geotechnics: ISFOG, pp.391-396.
2 Andersen, K. H., Murff, J. D., Randolph, M. F., Clukey, E. C., Erbrich, C. T., Jostad, H. P., Hansen, B., Aubeny, C., Sharma, P. and Supachawarote, C. (2005), "Suction anchors for deepwater applications", Keynote Lecture, Proceedings of International Symposium on Frontiers in Offshore Geotechnics, 1. Perth 2005. pp.3-30.
3 API (2007), Recommended Practice for Planning, Design and Constructing Fixed Offshore Platforms-Working Stress Design, American Petroleum Institute.
4 Colliat, J. L., Boisard, P., Andersen, K. and Schroeder, K. (1995), "Caisson Foundations as Alternative Anchors for Permanent Mooring of a Process Barge Offshore Congo", Proceedings of Offshore Technology Conference, OTC 7797, pp.919-929.
5 Das, B. M. (2011), Geotechnical Engineering Handbook, J. Ross Publishing, USA.
6 Ensoft, Inc.(2004), A Program for the analysis of piles and drilled shafts under lateral loads (LPILE Plus Ver 5.0), Technical Manual.
7 Midas IT(2012), Midas Civil User's Manual.
8 Randolph, M. F., Cassidy, M. J., Gourvenec, S. M. & Erbrich, C. (2005), "Challenges of offshore geotechnical engineering", Proc. 16th Int. Conf. Soil Mech. Geotech. Engng, Osaka, 1, pp.123-176.
9 Simulia (2010), Abaqus User's Manual. Dassault Systemes Simulia Corp.
10 Taiebat H. A., Carter J. P. (2000), "Numerical studies of the bearing capacity of shallow foundations on cohesive soil subjected to combined loading", Geotechnique, Vol.50, No.4, pp.409-418.   DOI
11 Yun G. and Bransby M. F. (2007), "The undrained vertical bearing capacity of skirted foundations in undrained soil", Soils and Foundations, Vol.47, No.3, pp.493-506.   DOI
12 Hung, L. C. and Kim, S. R. (2014b), "Evaluation of undrained bearing capacities of bucket foundations under combined loads", Marine Georesources and Geotechnology, Vol.32, No.1, pp.76-92.   DOI
13 Ensoft, Inc.(2010), A Program for the analysis of a group of piles subjected to vertical and lateral loading (Group Ver 8.0), Technical Manual.
14 Hung L. C., Kim, S. R. (2012), "Evaluation of vertical and horizontal bearing capacities of bucket foundations in clay", Ocean Engineering, Vol.52, pp.75-82.   DOI   ScienceOn
15 Hung, L. C. and Kim, S. R. (2014a), "Evaluation of combined horizontal-moment bearing capacities of tripod bucket foundations in undrained clay", Ocean-Engineering, Vol.85. pp.100-109.   DOI
16 Jeanjean, P. (2009), "Re-assessment of p-y curves for soft clays from centrifuge testting and finite element modeling," Offshore Technology Conference, Texas, USA, OTC20158.
17 KICT (2008), Development of construction technology for concrete floated offshore infrastructures, Planning report, KICT 2008-043, pp.3-8.
18 KICT (2011), Development of novel technologies for low-cost and high-efficiency suction piles(II), KICT 2011-091, pp.53-56.
19 Kim, Y.H., Jeong, S.S., Kim, J.H. and Lee, Y.G. (2007), "Effects of Lateral Pile Rigidity of Offshore Drilled Shafts by Developing p-y Curves in Marine Clay", Journal of KGS, Vol.23, No.6, pp.37-51.
20 Lee, J.H., Lee, S.H. and Kim, S.R. (2013), "Horizontal Bearing Behavior of Group Suction Piles by Numerical Analysis", Journal of KGS, Vol.29, No.11, pp.119-127.
21 Matlock, H. (1970), "Correlation for design of laterally loaded piles in soft clays," Proceedings of Offshore Technology Conference, Houston Texas, pp.577-594.