BEARING CAPACITY CHARACTERISTICS OF FOUR-BUCKET FOUNDATION IN OFFSHORE WIND TURBINES UNDER COMBINED LOADING CONDITIONS

Cao Zheng; Li Zhi; Jiang Qi; Dong Xiaofeng; Wang Haijun; Lian Jijian

doi:10.19912/j.0254-0096.tynxb.2022-1482

PDF(4645 KB)

Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (1) : 210-217. DOI: 10.19912/j.0254-0096.tynxb.2022-1482

BEARING CAPACITY CHARACTERISTICS OF FOUR-BUCKET FOUNDATION IN OFFSHORE WIND TURBINES UNDER COMBINED LOADING CONDITIONS

Cao Zheng^1,2, Li Zhi³, Jiang Qi^2,4, Dong Xiaofeng^1,2, Wang Haijun^1,2, Lian Jijian^1,2

Author information +

History +

Abstract

To investigate the failure modes of four-bucket foundation under V-H（rertical-horizontal load）, V-M（vertical-moment lood）, H-M（horizontal-moment load） and V-H-M（vertical-horizontal-moment load）, an overall model of four-bucket foundation with layered soil ground was established by means of ABAQUS based on a practical offshore wind project in Fujian, China. It shows that in V-H loading and H-M loading conditions, the vertical bearing capacity decreases as the horizontal load increases and the moment bearing capacity decreases proportionally with the increasing horizontal load. The motion pattern of four-bucket foundation changes from rotation to translation with the increase of vertical load under V-M combined loading condition. In V-H-M loading condition, the bearing capacity failure envelope will expand when the vertical load increases. The vertical load can obviously enhance the horizontal and moment bearing capacity of four bucket foundation.

Key words

offshore wind power / four-bucket foundation / combined load / bearing capacity of foundation / failure envelope

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

Cao Zheng, Li Zhi, Jiang Qi, Dong Xiaofeng, Wang Haijun, Lian Jijian. BEARING CAPACITY CHARACTERISTICS OF FOUR-BUCKET FOUNDATION IN OFFSHORE WIND TURBINES UNDER COMBINED LOADING CONDITIONS[J]. Acta Energiae Solaris Sinica. 2024, 45(1): 210-217 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1482

References

[1] 符平, 秦鹏飞, 张金接. 海上风资源时空特性研究[J]. 中国水利水电科学研究院学报, 2014, 12(2): 155-161.
FU P, QIN P F, ZHANG J J.Research of spatio-temporal characteristics of offshore wind resources[J]. Journal of China Institute of Water Resources and Hydropower Research, 2014, 12(2): 155-161.
[2] 封宇, 何焱, 朱启昊, 等. 近海及海上风资源时空特性研究[J]. 清华大学学报(自然科学版), 2016, 56(5): 522-529.
FENG Y, HE Y, ZHU Q H, et al.Temporal and spatial characteristics of offshore wind resources[J]. Journal of Tsinghua University (science and technology), 2016, 56(5): 522-529.
[3] 袁汝华, 黄海龙, 孙道青, 等. 海上风电风机基础结构形式及安装技术研究[J]. 能源与节能, 2018(12): 59-61.
YUAN R H, HUANG H L, SUN D Q, et al.research on basic structure and installation technology of offshore wind turbine[J]. Energy and energy conservation, 2018(12): 59-61.
[4] 严驰, 李亚坡, 袁中立. 桶形基础竖向承载力理论计算方法及土性参数的敏感性分析[J]. 中国海洋平台, 2004, 19(1): 31-36.
YAN C, LI Y P, YUAN Z L.The theoretical methods of calculation on vertical bearing capacity ofthe bucket foundation and sensitivity analysis onthe effect of soil parameters[J]. China offshore platform, 2004, 19(1): 31-36.
[5] 刘梅梅, 练继建, 杨敏, 等. 宽浅式筒型基础竖向承载力研究[J]. 岩土工程学报, 2015, 37(2): 379-384.
LIU M M, LIAN J J, YANG M, et al.Vertical bearing capacity of wide-shallow bucket foundation[J]. Chinese journal of geotechnical engineering, 2015, 37(2): 379-384.
[6] 孙曦源. 水平荷载作用下软土地基中桶形基础工作机理及承载性能研究[D]. 大连: 大连理工大学, 2009.
SUN X Y.A study on working mechanism and bearing capacity performance of bucket foundation in soft ground under lateral loads[D]. Dalian: Dalian University of Technology, 2009.
[7] MA P C, LIU R, LIAN J J, et al.An investigation into the lateral loading response of shallow bucket foundations for offshore wind turbines through centrifuge modeling in sand[J]. Applied ocean research, 2019, 87: 192-203.
[8] PARK J S, PARK D, YOO J K.Vertical bearing capacity of bucket foundations in sand[J]. Ocean engineering, 2016, 121: 453-461.
[9] 刘润, 陈广思, 刘禹臣, 等. 海上风电大直径宽浅式筒型基础抗弯特性分析[J]. 天津大学学报(自然科学与工程技术版), 2013, 46(5): 393-400.
LIU R, CHEN G S, LIU Y C, et al.Resisting moment behavior of large diameter and shallow buried bucket foundation for offshore wind turbine[J]. Journal of Tianjin University (science and technology), 2013, 46(5): 393-400.
[10] BARARI A, IBSEN L B.Undrained response of bucket foundations to moment loading[J]. Applied ocean research, 2012, 36: 12-21.
[11] LI S Q, WANG Y, LI Q W, et al.Failure envelopes of bucket foundations for offshore wind turbines under combined loading including torsion[J]. KSCE journal of civil engineering, 2019, 23(12): 5154-5162.
[12] 张其一. 复合加载模式下地基失效机制研究[J]. 岩土力学, 2009, 30(10): 2940-2944.
ZHANG Q Y.Study of failure patterns of foundation under combined loading[J]. Rock and soil mechanics, 2009, 30(10): 2940-2944.
[13] 李思琦, 王媛, 李庆文, 等. 非共面V-H-M复合加载模式下海上风电桶形基础破坏包络面特性研究[J]. 太阳能学报, 2021, 42(6): 391-399.
LI S Q, WANG Y, LI Q W, et al.Failure envelopes of bucket foundations for offshore wind turbines under combined non-planar V-H-M loading[J]. Acta energiae solaris sinica, 2021, 42(6): 391-399.
[14] 丁红岩, 王旭月, 张浦阳, 等. 砂土中宽浅式复合筒型基础三维包络面研究[J]. 太阳能学报, 2018, 39(4): 1097-1104.
DING H Y, WANG X Y, ZHANG P Y, et al.Study of three-dimensional enveloping surface of wide-shallow composite bucket foundation in sandy soil[J]. Acta energiae solaris sinica, 2018, 39(4): 1097-1104.
[15] 刘润, 王磊, 丁红岩, 等. 复合加载模式下不排水饱和软黏土中宽浅式筒型基础地基承载力包络线研究[J]. 岩土工程学报, 2014, 36(1): 146-154.
LIU R, WANG L, DING H Y, et al.Failure envelopes of large-diameter shallow buried bucket foundation in undrained saturated soft clay under combined loading conditions[J]. Chinese journal of geotechnical engineering, 2014, 36(1): 146-154.
[16] 刘润, 祁越, 李宝仁, 等. 复合加载模式下单桩复合筒型基础地基承载力包络线研究[J]. 岩土力学, 2016, 37(5): 1486-1496.
LIU R, QI Y, LI B R, et al.Failure envelopes of single-pile composite bucket foundation of offshore wind turbine under combined loading conditions[J]. Rock and soil mechanics, 2016, 37(5): 1486-1496.
[17] 丁红岩, 张超, 张浦阳, 等. 上覆软土层对海上风电四筒基础承载特性影响[J]. 哈尔滨工程大学学报, 2020, 41(1): 67-75.
DING H Y, ZHANG C, ZHANG P Y, et al.Effect of overlying soft soil layer on bearing capacity of four bucket foundation for offshore wind turbines[J]. Journal of Harbin Engineering University, 2020, 41(1): 67-75.
[18] 乐丛欢, 任建宇, 姜明涛, 等. 砂土中四筒导管架风机基础抗弯承载力研究[J]. 海洋工程, 2021, 39(2): 12-19.
LE C H, REN J Y, JIANG M T, et al.Analysis of the moment bearing capacity of four-bucket jacket foundation in sandy soil[J]. The ocean engineering, 2021, 39(2): 12-19.
[19] 乐丛欢, 庞雅博, 张浦阳, 等. 四筒导管架基础在砂土中的抗扭承载特性[J]. 哈尔滨工程大学学报, 2021, 42(11): 1654-1662.
LE C H, PANG Y B, ZHANG P Y, et al.Torque-bearing capacity characteristics of the tetrapod suction bucket jacket foundation in sand[J]. Journal of Harbin Engineering University, 2021, 42(11): 1654-1662.
[20] KIM S R, HUNG L C, OH M.Group effect on bearing capacities of tripod bucket foundations in undrained clay[J]. Ocean engineering, 2014, 79: 1-9.
[21] HUNG L C, KIM S R.Evaluation of combined horizontal-moment bearing capacities of tripod bucket foundations in undrained clay[J]. Ocean engineering, 2014, 85: 100-109.
[22] HESAR M.Geotechnical design of the barracuda and caratinga suction anchors[C]//Offshore Technology Conference. Houston, Texas, USA, 2003.