TY - JOUR
T1 - Investigation of hybrid monopile foundations for offshore wind turbines under lateral cyclic loading in sand
AU - Wang, Xuefei
AU - Zeng, Xiangwu
AU - Yang, Xu
AU - Yu, Hao
N1 - Publisher Copyright:
© ASCE.
PY - 2018
Y1 - 2018
N2 - Monopile foundation have been widely used for offshore wind projects. With growing size of offshore wind turbines and their deeper water depth, stronger foundations are needed. The hybrid monopile foundation, which combines a monopile with a friction wheel, is investigated in this study. A series of centrifuge tests was performed on foundation models under cyclic loadings in sandy soil. The tests were conducted on a monopile, a monopile with solid wheel, and a monopile with crashed stone wheel. The cyclic responses of the three models are described. Accumulated lateral displacements and lateral stiffnesses are investigated: the lateral displacement increases continuously with cycles but at a lower rate, and the stiffness tends to be larger during the cycles. The hybrid monopile foundation shows a better lateral capacity comparing to the original monopile foundation. The theoretical analyses of monopile foundations were introduced and compared with the experimental results. The results are aiming to optimize the design of offshore wind foundation and provide better in-service behaviors.
AB - Monopile foundation have been widely used for offshore wind projects. With growing size of offshore wind turbines and their deeper water depth, stronger foundations are needed. The hybrid monopile foundation, which combines a monopile with a friction wheel, is investigated in this study. A series of centrifuge tests was performed on foundation models under cyclic loadings in sandy soil. The tests were conducted on a monopile, a monopile with solid wheel, and a monopile with crashed stone wheel. The cyclic responses of the three models are described. Accumulated lateral displacements and lateral stiffnesses are investigated: the lateral displacement increases continuously with cycles but at a lower rate, and the stiffness tends to be larger during the cycles. The hybrid monopile foundation shows a better lateral capacity comparing to the original monopile foundation. The theoretical analyses of monopile foundations were introduced and compared with the experimental results. The results are aiming to optimize the design of offshore wind foundation and provide better in-service behaviors.
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U2 - 10.1061/9780784481578.023
DO - 10.1061/9780784481578.023
M3 - Conference article
AN - SCOPUS:85048896062
SN - 0895-0563
VL - 2018-March
SP - 219
EP - 231
JO - Geotechnical Special Publication
JF - Geotechnical Special Publication
IS - GSP 294
T2 - 3rd International Foundations Congress and Equipment Expo 2018: Installation, Testing, and Analysis of Deep Foundations, IFCEE 2018
Y2 - 5 March 2018 through 10 March 2018
ER -