Journal article

Suction caisson foundations for offshore wind energy: cyclic response in sand and sand over clay

Fangyuan Zhu, Britta Bienen, Conleth O'Loughlin, Mark Jason Cassidy, Neil Morgan

Géotechnique | I C E Publishing | Published : 2019

Abstract

This technical note considers experimental data on the long-term response of a suction caisson in sand and sand over clay to lateral cyclic loading. Installation of the caisson under suction in a geotechnical centrifuge provides insight into the contribution of this installation process, as well as the effects that soil drainage and consolidation in the clay layer have on the accumulated caisson rotation and change in stiffness. The tests focused on sand over clay, and considered variations in the cyclic load magnitude and symmetry. One-way cyclic loading in sand over clay is seen to result in higher rotation than two-way loading, which contrasts with findings from previous studies in sand. ..

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University of Melbourne Researchers

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Funding Acknowledgements

This work forms part of the activities of COFS, which is currently supported as one of the primary nodes of the Australian Research Council Centre of Excellence for Geotechnical Science and Engineering and as a Centre of Excellence by the Lloyd's Register Foundation. Lloyd's Register Foundation helps to protect life and property by supporting engineering-related education, public engagement and the application of research. The project also received funding from Lloyd's Register. John Breen, Guido Wager, Khin Thida Seint, Manuel Palacios, Kelvin Leong and Dave Jones provided assistance during the tests. The above support is gratefully appreciated.