KSCE Journal of Civil Engineering

, Volume 23, Issue 5, pp 2083–2095 | Cite as

Nonlinear Response of Piled Gravity Base Foundations Subjected to Combined Loading

  • Jihun Seo
  • Youngho Kim
  • Jeongmin Goo
  • Yun Wook ChooEmail author
Geotechnical Engineering


This study investigates the soil-structure interaction of a piled Gravity Base Foundation (piled GBF) supporting an offshore wind turbine tower. The piled GBF is a gravity base foundation supported by five piles with one center and four outer piles. A series of three-dimensional finite element analyses were performed to investigate p-y characteristics in the piled GBF. The results were validated against centrifuge test data prior to undertaking a detailed parametric study, exploring the relevant range of parameters in terms of foundation type, vertical load due to the gravity base self-weight, loading height, undrained shear strength, and the pile bearing condition. Overall, the center pile of the piled GBF showed the highest ultimate soil reaction force, while the leading pile indicated the lowest value. Due to the rotation of mat and self-weight of GBF, significant shear failure was mobilized near the leading pile, which reduced the ultimate soil reaction force. This was also confirmed through the comparison studies with group pile (no mat), piled raft (low self-weight of mat) and rock-socketed piled GBF (no rotation of mat).


piled gravity base foundation clay offshore wind turbine numerical analysis soil-pile interaction p-y curve 


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  1. Bae, K. T., Choo, Y. W., Youn, H. J., Kim, J. Y., Choi, C. H., and Kwon, O. (2017). “Geotechnical perspective on offshore wind plan, strategy, projects and research in Korea.” Proceeding of TC 209 Workshop, 19 th ICSMGE, Seoul, Korea, pp. 13–20.Google Scholar
  2. Brown, D. A., Morrison, C., and Reese, L.C. (1988). “Lateral load behavior of pile group in sand.” Journal of Geotechnical Engineering, vol. 114, no. 11, pp. 1261–1276, DOI: 10.1061/(ASCE)0733-9410 (1988)114:11(1261).CrossRefGoogle Scholar
  3. Choo, Y. W., Seo, J. H., Kim, Y. N., Goo, J. M., and Kim, Y. (2016a). “Numerical studies on piled gravity base foundation for offshore wind turbine.” Marine Georesources and Geotechnology, vol. 34, no. 8, pp. 729–740, DOI: 10.1080/1064119X. 2015.1080334.CrossRefGoogle Scholar
  4. Choo, Y. W., Seo, J. H., Kim, S. H., Goo, J. M., and Kim, Y. (2016b). “Numerical study on lateral response of piles supporting gravity base foundations for offshore wind turbine.” Proceedings of Twentysixth International Ocean and Polar Engineering Conference, Rhodes, Greece, pp. 76–82.Google Scholar
  5. Dassault Systemes (2014). ABAQUS 6.14 EF documentation, Hibbitt, Karlsson & Sorensen, Inc., RI, USA.Google Scholar
  6. DNV (2014). Design of offshore wind turbine structures, DNV-OS-J101, Det Norske Veritas, Høvik, Norway.Google Scholar
  7. Doherty, P. and Gavin, K. (2012). “Laterally loaded monopile design for offshore wind farms.” Proceedings of the Institution of Civil Engineers, vol. 165, no. 1, pp. 7–17, DOI: 10.1680/ener.11.00003.CrossRefGoogle Scholar
  8. EWEA (2012). The European offshore wind industry–Key 2011 trends and statistics, Technical Report, The European Wind Energy Association, Brussels, Belgium.Google Scholar
  9. Giretti, D. (2010). Modelling of piled raft foundations in sand. PhD Thesis, University of Ferrara, Ferrara, Italy.Google Scholar
  10. Haiderali, A. E. and Madabhushi, G. S. P. (2013). “Evaluation of the p-y method in the design of monopiles for offshore wind turbines.” Proc. Offshore Technology Conference, Vol. 3, pp.1824-1844.Google Scholar
  11. Hung, L. C. and Kim, S. R. (2012). “Evaluation of vertical and horizontal bearing capacities of bucket foundations in clay.” Ocean Engineering, vol. 52, pp. 75–82, DOI: 10.1016/j.oceaneng.2012.06.001.CrossRefGoogle Scholar
  12. Jeong, S. and Cho, J. (2014). “Proposed nonlinear 3-D analytical method for piled raft foundations.” Computers and Geotechnics, vol. 59, pp. 112–126, DOI: 10.1016/j.compgeo.2014.02.009.CrossRefGoogle Scholar
  13. KICT (2013). Development of hybrid substructure systems for offshore wind power, Korea Institute of Civil Engineering and Building Technology, Korea (in Korean).Google Scholar
  14. Kim, D. J., Choo, Y. W., Kim, J. H., Kim, S., and Kim, D. S. (2014). “Investigation of monotonic and cyclic behavior of tripod suction bucket foundations for offshore wind towers using centrifuge modeling.” Journal of Geotechnical and Geoenvironmental Engineering, Vol. 140, No. 5, 04014008, DOI: 10.1061/(ASCE)GT.1943-5606. 0001083.Google Scholar
  15. Kim, Y. H., Hossain, M. S., Wang, D., and Randolph, M. F. (2015). “Numerical investigation of dynamic installation of torpedo anchors in clay.” Ocean Engineering, vol. 108, pp. 820–832, DOI: 10.1016/j.oceaneng.2015.08.033.CrossRefGoogle Scholar
  16. Kim, Y. H. and Jeong, S. S. (2011). “Analysis of soil reaction force on laterally loaded piles based on 3D soil-pile interaction.” Computers and Geotechnics, vol. 38, no. 2, pp. 248–257, DOI: 10.1016/j.compgeo.2010.12.001.CrossRefGoogle Scholar
  17. Kim, K. N., Lee, S. H., Kim, K. S., Chung, C. K., Kim, M. M., and Lee, H. S. (2001). “Optimal pile arrangement for minimizing differential settlements in piled raft foundations.” Computers and Geotechnics, Vol. 28, No. 4, pp 235–253, DOI: 10.1016/S0266-352X(01)00002-7.Google Scholar
  18. Lee, J. H., Kim, Y., and Jeong, S. S. (2010). “Three-dimensional analysis of bearing behavior of piled raft on soft clay.” Computers and Geotechnics, vol. 37, Nos. 1–2, pp. 103–114, DOI: 10.1016/j.compgeo.2009.07.009.CrossRefGoogle Scholar
  19. Ma, J., Wang, D., and Randolph, M. F. (2014). “A new contact algorithm in the material point method for geotechnical simulations.” International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 38, No. 11, pp.1197-1210, DOI: 10.1002/nag.2266.Google Scholar
  20. Park, D. and Lee, J. (2015). “Comparative analysis of various interaction effects for piled rafts in sands using centrifuge tests.” Journal of Geotechnical and Geoenvironmental Engineering, Vol. 141, No. 1, 04014082, DOI: 10.1061/(ASCE)GT.1943-5606.0001183.Google Scholar
  21. Poulos, H. G. (2001). “Piled raft foundations: Design and applications.” Geotechnique, vol. 51, no. 2, pp. 95–113, DOI: 10.1680/geot. 2001.51.2.95.CrossRefGoogle Scholar
  22. Reul, O. and Randolph, M. F. (2004). “Design strategies for piled rafts subjected to nonuniform vertical loading.” Journal of Geotechnical and Geoenvironmental Engineering, vol. 130, no. 1, pp. 1–13. DOI: 10.1061/(ASCE)1090-0241(2004)130:1(1).CrossRefGoogle Scholar
  23. Seo, J. H., Choo, Y. W., Goo, J. M., and Kim, Y. H. (2017). “Investigation on horizontal behavior on piled gravity base foundation for offshore wind turbine using numerical and centrifuge modeling.” Proc. 19th Int. Conf. on Soil Mechanics and Geotechnical Engineering, Seoul, Korea.Google Scholar
  24. Sespene, S. and Choo, Y. W. (2018). “Determination of undrained shear strength using miniature cone and T-bar penetrometers for Kaolin clay.” Journal of the Korean Society of Civil Engineers, vol. 38, no. 3, pp. 429–438, DOI: 10.12652/Ksce.2018.38.3.0429 (In Korean).Google Scholar
  25. Shin, Y., Langford, T., Cho, K. H., and Park, J. H. (2014). “Design of composite pile foundations for offshore wind turbines.” Proceedings of the Twenty-fourth International Ocean and Polar Engineering Conference, Busan, Korea, pp. 211–217.Google Scholar
  26. Vu, A. T., Matsumoto, T., Yoshitani, R., and Nguyen, T. L. (2017). “Behavior of pile group and piled raft foundation models having batter piles.” Journal of Earth Engineering, vol. 2, no. 1, pp. 27–40.Google Scholar
  27. Wind Europe (2018). “Offshore wind in Europe–Key trend and statistics 2017.” WindEurope Business Intelligence, [Accessed on June 30, 2018].Google Scholar

Copyright information

© Korean Society of Civil Engineers 2019

Authors and Affiliations

  • Jihun Seo
    • 1
  • Youngho Kim
    • 2
  • Jeongmin Goo
    • 3
  • Yun Wook Choo
    • 1
    Email author
  1. 1.Dept. of Civil Environmental EngineeringKongju National UniversityCheonanKorea
  2. 2.Centre for Offshore Foundation SystemsUniversity of Western AustraliaPerthAustralia
  3. 3.Research InstituteDong Myeong Engineering Consultants & Architecture CO.SeoulKorea

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