Journal
CANADIAN GEOTECHNICAL JOURNAL
Volume 59, Issue 8, Pages 1523-1526Publisher
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/cgj-2019-0814
Keywords
surficial crust; circular foundation; zero-tension interface; failure envelope; finite element analysis
Funding
- Natural Sciences and Engineering Research Council of Canada [RGPIN-2015-06062]
- China Scholarship Council (CSC)
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This paper investigates the undrained VHMT failure envelope of circular foundations founded on a surficial crust underlain by a uniform soil with a zero-tension interface condition using finite element analysis. An analytical expression for the VHMT failure envelope is derived.
Wind turbines are typically designed based on fatigue and serviceability limit states, but still require an accurate assessment of bearing capacity. Overconsolidated clay deposits in Canada often have a thin layer of crust with a relatively high undrained shear strength developed from weathering, desiccation, and geochemical processes. However, existing design methods only assess the bearing capacity using effective area and inclination factor without consideration of surficial crusts. This paper studies the undrained VHMT (vertical, horizontal, moment, and torsional) failure envelope of circular foundations founded on a surficial crust underlain by a uniform soil with a zero-tension interface condition using finite element analysis. An analytical expression for the VHMT failure envelope is derived.
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