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

TY - JOUR

T1 - Undrained capacity of circular shallow foundations on two-layer clays under combined VHMT loading

AU - He, Pengpeng

AU - Newson, Tim

N1 - Copyright: © 2022 The Author(s).

PY - 2022/8

Y1 - 2022/8

N2 - 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.

AB - 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.

KW - Circular foundation

KW - Failure envelope

KW - Finite element analysis

KW - Surficial crust

KW - Zero-tension interface

U2 - 10.1139/cgj-2019-0814

DO - 10.1139/cgj-2019-0814

M3 - Article

AN - SCOPUS:85135108928

SN - 0008-3674

VL - 59

SP - 1523

EP - 1526

JO - Canadian Geotechnical Journal

JF - Canadian Geotechnical Journal

IS - 8

ER -