TY - JOUR
T1 - Performance and bearing behavior of monopile-friction wheel foundations under lateral-moment loading for offshore wind turbines
AU - Yang, Xu
AU - Zeng, Xiangwu
AU - Wang, Xuefei
AU - Berrila, Jim
AU - Li, Xinyao
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/7/15
Y1 - 2019/7/15
N2 - The hybrid foundation of combining a friction wheel with a monopile is an innovative solution for offshore structures subjected to large lateral-moment loading. In this paper, the lateral-moment response of the monopile-friction wheel foundation in saturated sand are investigated via centrifuge tests and three-dimensional finite element method (FEM). A series of tests on the monopile, hybrid foundations with wheels of different diameters and thicknesses, and single wheel foundation were conducted. The results show that the lateral bearing capacity and stiffness improve significantly by adding a wheel to monopile, and the improvement follows the diameter or thickness of the wheel. An extensive experimental research regarding to the influential factors such as the embedment of the wheel and the vertical load is also presented. By means of FEM, the load transfer mechanism, interaction between the foundation and soil, and the bending moment in the pile are illustrated to study how the wheel contributes to the performance of the foundation system. Moreover, the effects of load eccentricity and vertical load are investigated by FE analyses.
AB - The hybrid foundation of combining a friction wheel with a monopile is an innovative solution for offshore structures subjected to large lateral-moment loading. In this paper, the lateral-moment response of the monopile-friction wheel foundation in saturated sand are investigated via centrifuge tests and three-dimensional finite element method (FEM). A series of tests on the monopile, hybrid foundations with wheels of different diameters and thicknesses, and single wheel foundation were conducted. The results show that the lateral bearing capacity and stiffness improve significantly by adding a wheel to monopile, and the improvement follows the diameter or thickness of the wheel. An extensive experimental research regarding to the influential factors such as the embedment of the wheel and the vertical load is also presented. By means of FEM, the load transfer mechanism, interaction between the foundation and soil, and the bending moment in the pile are illustrated to study how the wheel contributes to the performance of the foundation system. Moreover, the effects of load eccentricity and vertical load are investigated by FE analyses.
KW - Centrifuge modelling
KW - FEM
KW - Lateral bearing capacity
KW - Monopile-friction wheel foundation
KW - Offshore wind turbine
UR - http://www.scopus.com/inward/record.url?scp=85066450474&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85066450474&partnerID=8YFLogxK
U2 - 10.1016/j.oceaneng.2019.05.043
DO - 10.1016/j.oceaneng.2019.05.043
M3 - Article
AN - SCOPUS:85066450474
SN - 0029-8018
VL - 184
SP - 159
EP - 172
JO - Ocean Engineering
JF - Ocean Engineering
ER -