Undrained Capacity of Plate Anchors under General Loading
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 136, Issue 10
Abstract
Under general conditions of loading, a plate anchor is subjected to six degrees of freedom of loading, three force components and three moment components. Prediction of the anchor performance under general conditions of loading requires realistic estimates of the anchor pullout capacity for each individual load component as well as the interaction effects when these loads are applied in combination. This paper presents an analysis of plate anchor capacity under these general conditions of loading. The study considers a range of plate width-to-length ratios ranging from 1:1 to 2:1. The anchor capacity estimates and interaction relationships were developed based on finite-element studies and upper bound plastic limit analyses. Interaction relationships developed from the numerical and analytical studies were fitted to a simple six degrees-of-freedom yield locus equation.
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Acknowledgments
The writers would like to acknowledge the support of the Joint Industry Project which was operated for the participants by ABS Consulting and especially John Stiff of ABS for his assistance and encouragement throughout the effort. The writers would also like to acknowledge our colleagues at the University of Texas at Austin who carried out the experimental parts of the project and with whom the writers interacted closely during the entire project.
References
Andersen, K. H., Murff, J. D., and Randolph, M. F. (2003). “Deepwater anchor design practice-vertically loaded drag anchors.” Phase II Rep. to API/Deepstar, Norwegian Geotechnical Institute, Oslo, Norway/Offshore Technology Research Center, Tex./Centre for Offshore Foundation Systems, Western Australia, Australia.
Bransby, M. F., and O’Neill, M. P. (1999). “Drag anchor fluke-soil interaction in clays.” Int. Symp. on Numerical Models in Geomechanics (NUMOG VII), Balkema, Graz, Austria, 489–494.
Chen, W. F. (1975). Limit analysis and soil plasticity, Elsevier Publishing Co., Amsterdam, The Netherlands.
Elkhatib, S., and Randolph, M. F. (2005). “The effect of interface friction on the performance of drag-in plate anchors.” Proc., Int. Symp. on Frontiers in Offshore Geotechnics, IS-FOG05, Taylor & Francis, Perth, Western Australia, 171–177.
Gaudin, C., O’Loughlin, C. D., Randolph, M. F., and Lowmass, A. C. (2006). “Influence of the installation process on the performance of suction embedded plate anchors.” Geotechnique, 56(6), 381–391.
Gilbert, R. G., et al. (2009). “Analytical and experimental modeling of out-of-plane loading of plate anchors.” Offshore Technology Conf., OTC, Houston.
HKS, Inc. (2006). ABAQUS, version 6.6 user’s manual, Hibbitt, Karlson and Sorensen, Inc., Pawtucket, R.I.
Martin, C. M., and Randolph, M. F. (2001). “Applications of the lower and upper bound theorems of plasticity to collapse of circular foundations.” Proc., 10th Int. Conf., Vol. 2, International Association of Computer Methods and Advances in Geomechnics, Tucson, Ariz., 1417–1428.
Merifield, R. S., Lyamin, A. V., Sloan, S. W., and Yu, H. S. (2003). “Three-dimensional lower bound solutions for stability of plate anchors in clay.” J. Geotech. Geoenviron. Eng., 129(3), 243–253.
Merifield, R. S., Sloan, S. W., and Yu, H. S. (2001). “Stability of plate anchors in undrained clay.” Geotechnique, 51(2), 141–153.
Murff, J. D., et al. (2005). “Vertically loaded plate anchors for deepwater applications.” Proc., Int. Symp. on Frontiers in Offshore Geotechnics, IS-FOG05, Taylor & Francis, Perth, Western Australia, 31–48.
O’Neill, M. P., Bransby, M. F., and Randolph, M. F. (2003). “Drag anchor fluke-soil interaction in clays.” Can. Geotech. J., 40, 78–94.
Rowe, R. K. (1978). “Soil-structure interaction analysis and its application to the prediction of anchor behavior.” Ph.D. thesis, Univ. of Sydney, Sydney, Australia.
Rowe, R. K., and Davis, E. H. (1982). “The behavior of anchor plates in clay.” Geotechnique, 32(1), 9–23.
Song, Z., and Hu, Y. (2005). “Vertical pullout behavior of plate anchors in uniform clay.” Proc., Int. Symp. on Frontiers in Offshore Geotechnics, IS-FOG05, Taylor & Francis, Perth, Western Australia, 205–211.
Song, Z., Hu, Y., and Randolph, M. F. (2008). “Numerical simulation of vertical pullout of plate anchors in clay.” J. Geotech. Geoenviron. Eng., 134(6), 866–875.
Vryhof Anchors. (2005). Anchor manual, Krimpen ad Yssel, The Netherlands.
Wang, D., Hu, Y., and Randolph, M. F. (2009). “Three-dimensional large deformation finite-element analysis of plate anchors in uniform clay.” J. Geotech. Geoenviron. Eng., 136(2), 355–365.
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© 2010 ASCE.
History
Received: Aug 21, 2009
Accepted: Feb 18, 2010
Published online: Feb 20, 2010
Published in print: Oct 2010
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