Undrained capacity of circular shallow foundations on two-layer clays under combined VHMT loading

Pengpeng He, Tim Newson

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
49 Downloads (Pure)


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.

Original languageEnglish
Pages (from-to)1523-1526
Number of pages4
JournalCanadian Geotechnical Journal
Issue number8
Early online date12 Jan 2022
Publication statusPublished - Aug 2022


  • Circular foundation
  • Failure envelope
  • Finite element analysis
  • Surficial crust
  • Zero-tension interface

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology


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