TY - JOUR
T1 - Undrained capacity of circular shallow foundations under combined VHMT loading
AU - He, Pengpeng
AU - Newson, Tim
N1 - Funding Information:
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the Natural Sciences and Engineering Research Council of Canada [Grant No.: RGPIN-2015-06062].
Publisher Copyright:
© The Author(s) 2022. CC BY
PY - 2022/10
Y1 - 2022/10
N2 - Wind turbine (WT) foundations are generally subjected to large combined vertical, horizontal, moment, and torsional (VHMT) loads. The available investigations of the ultimate limit states of WT foundations focus predominately on unlimited-tension soil-foundation interfaces that are more appropriate for offshore settings. However, the interfaces for onshore WT foundations are generally unable to resist tensile loads. To address this omission, a zero-tension interface is used to investigate the VHMT failure envelope of circular shallow foundations under undrained soil conditions using finite element analysis. The effects of soil strength heterogeneity and foundation embedment were investigated. The results show that torsional loads reduce the VHM bearing capacity of circular foundations. The foundation embedment is also found to significantly increase the foundation bearing capacity. A full 4-D analytical expression for the VHMT failure envelope has been proposed based on the calculated failure envelopes.
AB - Wind turbine (WT) foundations are generally subjected to large combined vertical, horizontal, moment, and torsional (VHMT) loads. The available investigations of the ultimate limit states of WT foundations focus predominately on unlimited-tension soil-foundation interfaces that are more appropriate for offshore settings. However, the interfaces for onshore WT foundations are generally unable to resist tensile loads. To address this omission, a zero-tension interface is used to investigate the VHMT failure envelope of circular shallow foundations under undrained soil conditions using finite element analysis. The effects of soil strength heterogeneity and foundation embedment were investigated. The results show that torsional loads reduce the VHM bearing capacity of circular foundations. The foundation embedment is also found to significantly increase the foundation bearing capacity. A full 4-D analytical expression for the VHMT failure envelope has been proposed based on the calculated failure envelopes.
KW - circular foundation
KW - failure envelope
KW - finite element analysis
KW - Wind turbine
KW - zero-tension interface
UR - http://www.scopus.com/inward/record.url?scp=85126091614&partnerID=8YFLogxK
U2 - 10.1177/0309524X221083024
DO - 10.1177/0309524X221083024
M3 - Article
AN - SCOPUS:85126091614
SN - 0309-524X
VL - 46
SP - 1452
EP - 1470
JO - Wind Engineering
JF - Wind Engineering
IS - 5
ER -