Journal
COMPUTERS AND GEOTECHNICS
Volume 45, Issue -, Pages 127-139Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2012.05.009
Keywords
Skirted foundation; Offshore foundation; Combined loading; Capacity
Categories
Funding
- Australian Research Council's (ARC) Linkage Program [LP0989433]
- ARC [DP110101603, FT0990301]
- Australian Research Council [LP0989433, FT0990301] Funding Source: Australian Research Council
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Offshore foundations are subject to combinations of vertical, horizontal and moment (VHM) loading. Different foundation solutions are appropriate, depending amongst others, on the expected load combinations. This paper investigates in detail the soil failure mechanisms and resulting foundation capacity under undrained VHM loading of a hybrid foundation concept. Comprising of a skirted mat combined with an internal caisson compartment, this foundation design is found to provide significantly increased horizontal capacity that is often critical in offshore applications, with key influences for increased moment capacity identified as well. The numerical study investigated both variations in the geometry of the internal caisson compartment and the soil shear strength profile. The paper concludes by proposing expressions that allow slightly conservative prediction of the combined capacity of a hybrid foundation. (C) 2012 Elsevier Ltd. All rights reserved.
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