Effect of Embedment on the Plastic Behavior of Bucket Foundations
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 141, Issue 6
Abstract
A series of comprehensive research and development projects has validated the novel concept of the bucket foundation as an alternative to piled foundations, and bucket foundations are rapidly becoming a viable option for offshore wind farms and marginal fields.
Within the last decade, experimental studies have indicated the possibility of defining foundation response using plasticity theory. Results of multiple loading tests addressing the effect of embedment on the strain-hardening behavior of shallow bucket foundations under combined loading are reported. The kinematic mechanisms accompanying pre-failure are presented. It is argued that the drained capacity of offshore bucket foundations and the ratio of plastic increments are largely influenced by embedment depth and the preload ratio .
Get full access to this article
View all available purchase options and get full access to this article.
References
Achmus, M., and Abdel-Rahman, K. (2005). “Design of monopile foundations for offshore wind energy plants.” 11th Int. Colloquium on Structural and Geotechnical Engineering, Cairo, Egypt.
Barari, A., and Ibsen, L. B. (2012). “Undrained response of bucket foundations to moment loading.” Appl. Ocean Res., 36(1), 12–21.
Barari, A., and Ibsen, L. B. (2014). “Vertical capacity of bucket foundations in undrained soil.” J. Civ. Eng. Manage., 20(3), 1–12.
Bienen, B., Byrne, B. W., Houlsby, G. T., and Cassidy, M. J. (2006). “Investigating six-degree-of-freedom loading of shallow foundations on sand.” Géotechnique, 56(6), 367–379.
Butterfield, R. (1980). “Another look at gravity platform foundations.” Proc., Soil Mechanics and Foundation Engineering in Offshore Technology, CISM, Udine, Italy.
Butterfield, R., Houlsby, G. T., and Gottardi, G. (1997). “Standardized sign conventions and notation for generally loaded foundations.” Géotechnique, 47(5), 1051–1054.
Byrne, B. W. (2000). “Investigations of suction caissons in dense sand.” Ph.D. thesis, University of Oxford, Oxford, U.K.
Byrne, B. W., and Houlsby, G. T. (1999). “Drained behaviour of suction caisson foundations on very dense sand.” Proc., Offshore Technology Conf., OTC 10994, Houston, 1–18.
Byrne, B. W., and Houlsby, G. T. (2001). “Observations of footing behaviour of loose carbonate sands.” Géotechnique, 51(5), 463–466.
Cassidy, M. J. (2007). “Experimental observations of the combined loading behaviour of circular footings on loose silica sand.” Géotechnique, 57(4), 397–401.
Cassidy, M. J., Byrne, B. W., and Houlsby, G. T. (2002). “Modelling the behaviour of circular footings under combined loading on loose carbonate sand.” Géotechnique, 52(10), 705–712.
Cassidy, M. J., Byrne, B. W., and Randolph, M. F. (2004). “A comparison of the combined load behaviour of spudcan and caisson foundations on soft normally consolidated clay.” Géotechnique, 54(2), 91–106.
Cassidy, M. J., Randolph, M. F., and Byrne, B. W. (2006). “A plasticity model describing caisson behaviour in clay.” Appl. Ocean Res., 28(5), 345–358.
DNV (Den Norske Veritas). (1992). “Foundations.” Classification Notes, No. 30.4, Norway.
Doherty, P., and Gavin, K. (2011). “Laterally loaded monopile design for offshore wind farms.” Proc. ICE Energy, 165(1), 7–17.
Gottardi, G., Houlsby, G. T., and Butterfield, R. (1999). “Plastic response of circular footings on sand under general planar loading.” Géotechnique, 49(4), 453–469.
Gourvenec, S. (2007). “Failure envelopes for offshore shallow foundations under general loading.” Géotechnique, 57(9), 715–728.
Houlsby, G. T., and Cassidy, M. J. (2002). “A plasticity model for the behaviour of footings on sand under combined loading.” Géotechnique, 52(2), 117–129.
Ibsen, L. B. (2008). “Implementation of a new foundations concept for offshore wind farms.” Proc., Nordic Geotechnical Meeting, Norwegian Geotechnical Society, Sandefjord, Norway, 19–33.
Ibsen, L. B., Barari, A., and Larsen, K. A. (2012). “Modified vertical bearing capacity for circular foundations in sand using reduced friction angle.” Ocean Eng., 47, 1–6.
Ibsen, L. B., Barari, A., and Larsen, K. A. (2014a). “Adaptive plasticity model for bucket foundations.” J. Eng. Mech., 361–373.
Ibsen, L. B., Larsen, K. A., and Barari, A. (2014b). “Calibration of failure criteria for bucket foundations on drained sand under general loading.” J. Geotech. Geoenviron. Eng., 04014033.
ISO. (2012). “Site-specific assessment of mobile offshore units: Part 1.” ISO 19905-1, Geneva.
Larsen, K. A., Ibsen, L. B., and Barari, A. (2013). “Modified expression for the failure criterion of bucket foundations subjected to combined loading.” Can. Geotech. J., 50(12), 1250–1259.
Nova, R., and Montrasio, L. (1991). “Settlements of shallow foundations on sand.” Géotechnique, 41(2), 243–256.
Roscoe, K. H., and Schofield, A. N. (1956). “The stability of short pier foundations in sand.” Br. Weld. J., 4, 343–354.
Tjelta, T. I. (1995). “Geotechnical experience from the installation of the europipe jacket with bucket foundations.” Proc., 27th Offshore Technology Conf., Houston, 897–908.
Villalobos, F. A., Byrne, B. W., and Houlsby, G. T. (2005). “Moment loading of caissons installed in saturated sand.” Proc., Int. Symp. on Frontiers in Offshore Geotechnics (ISFOG), Perth, WA, Australia.
Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 141 • Issue 6 • November 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Dec 18, 2013
Accepted: Sep 8, 2014
Published online: Jul 8, 2015
Published in print: Nov 1, 2015
Discussion open until: Dec 8, 2015
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.