Consolidation effects on monotonic and cyclic capacity of plate anchors in sand
AuthorChow, SH; Diambra, A; O'Loughlin, CD; Gaudin, C; Randolph, MF
Source TitleGeotechnique: international journal of soil mechanics
PublisherThomas Telford Ltd.
University of Melbourne Author/sChow, Shiao Huey
Document TypeJournal Article
CitationsChow, S. H., Diambra, A., O'Loughlin, C. D., Gaudin, C. & Randolph, M. F. (2020). Consolidation effects on monotonic and cyclic capacity of plate anchors in sand. Géotechnique, 70 (8), pp.1-12. https://doi.org/10.1680/jgeot.19.ti.017.
Access StatusThis item is embargoed and will be available on 2021-07-31
This study investigated the change in monotonic and cyclic capacity of a plate anchor across different degrees of consolidation in dense sand. To quantify the effect of consolidation on anchor capacity, a framework is introduced and validated using centrifuge model anchor test data. The centrifuge tests considered a rectangular plate loaded at varying rates in dense sand, under both monotonic and irregular cyclic conditions, at a fixed embedment depth and with a horizontal load inclination (at the seabed). In order to vary from drained to undrained conditions, the sand was saturated using both water and a viscous pore fluid with viscosity approximately 700 times higher than water. The anchor's ultimate monotonic capacity in dense sand increased by up to 173% as the consolidation response evolved from drained to undrained with generation of dilation-induced suction. This increase in capacity across the consolidation regime can be adequately quantified using the proposed framework; however, uncertainty arises in achieving the theoretical undrained capacity. Both drained and undrained irregular cyclic loading resulted in anchor capacity increases of up to 33%, attributed to soil volume changes associated with cyclic densification under drained cyclic loading and excess pore pressure dissipation under undrained cyclic loading.
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