Dynamic response characteristics of an offshore, wind-power monopile foundation in heterogeneous soil

KONG De-sen; LIU Yi; DENG Mei-xu; LI Ya-zhou

doi:10.13374/j.issn2095-9389.2020.03.19.004

Volume 43 Issue 5

May 2021

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KONG De-sen, LIU Yi, DENG Mei-xu, LI Ya-zhou. Dynamic response characteristics of an offshore, wind-power monopile foundation in heterogeneous soil[J]. Chinese Journal of Engineering, 2021, 43(5): 710-719. doi: 10.13374/j.issn2095-9389.2020.03.19.004

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KONG De-sen, LIU Yi, DENG Mei-xu, LI Ya-zhou. Dynamic response characteristics of an offshore, wind-power monopile foundation in heterogeneous soil[J]. Chinese Journal of Engineering, 2021, 43(5): 710-719. doi: 10.13374/j.issn2095-9389.2020.03.19.004

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Dynamic response characteristics of an offshore, wind-power monopile foundation in heterogeneous soil

doi: 10.13374/j.issn2095-9389.2020.03.19.004

KONG De-sen^{1, 2
,
,},
LIU Yi^{2, 3},
DENG Mei-xu²,
LI Ya-zhou²

1.
Shandong Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, China
2.
College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, China
3.
China Railway Construction Group Shandong Co. Ltd., Qingdao 266100, China

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Corresponding author: E-mail: skd992012@sdust.edu.cn
Received Date: 2020-03-19
Publish Date: 2021-05-25

Abstract

Abstract

Wind energy is a new kind of inexhaustible energy. It is gradually replacing the traditional energy as its pollution-free and renewable. China has a long coastline, abundant offshore resources, and vast offshore space. Offshore wind farms have gradually become the focus of wind-power development. Large-diameter single-pile foundations are being widely used in the field of offshore power generation because of advantages including convenient manufacture and installation, clearer stress conditions compared with pile groups, and affordable cost and economy. Therefore, it becomes significantly relevant to study the dynamic response characteristics of large-diameter single-pile foundations under horizontal cyclic loads to eliminate the dangers hidden in engineering and installation and ensure normal usage during service. A numerical calculation model of an offshore, wind-power monopile foundation in heterogeneous soil was established by the finite element analysis software ABAQUS. The wave, ocean current, and wind load on the monopile foundation were equivalent to a bidirectional symmetrical cyclic load. The horizontal displacement, shear force, and bending moment along the pile shaft, and pile-side soil resistance under the horizontal cyclic load were studied. Furthermore, the horizontal displacements along the pile shaft under different cyclic times were compared with one another and analyzed. The results show that the horizontal displacement along the pile shaft accumulates gradually with time, and with increase in the number of cycles, the time lag of the maximum displacement of the pile body at mud surface occurs. The shear force along the pile shaft appears negative. The maximum bending moment of the pile body occurs in shallow soil. The variation in the soil-resistance curve of the pile body vs time occurs at a cut-off point at approximately 2/3 of the buried depth. Additionally, the variation laws of soil resistance within the upper and lower boundaries of the cut-off point are just the opposite of each other. The soil resistance increases significantly at the interface between silt and silty soil. The load along the buried depth of the inner wall of the pile remains unchanged at different time points.
- heterogeneous soil,
- offshore wind power,
- monopile foundation,
- dynamic response,
- horizontal cyclic load

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References(29)

References

[1]	靳軍偉, 楊敏, 王偉, 等. 海上風電機組單樁基礎模態及參數敏感性分析. 同濟大學學報(自然科學版), 2014, 42(3):386 doi: 10.3969/j.issn.0253-374x.2014.03.010 Jin J W, Yang M, Wang W, et al. Offshore wind turbine monopile foundation modal and parameter sensitivity analysis. J Tongji Univ Nat Sci, 2014, 42(3): 386 doi: 10.3969/j.issn.0253-374x.2014.03.010
[2]	王國粹, 王偉, 楊敏. 3.6 MW海上風機單樁基礎設計與分析. 巖土工程學報, 2011, 33(增刊 2):95 Wang G C, Wang W, Yang M. Design and analysis of monopile foundation for 3.6 MW offshore wind turbine. Chin J Geotech Eng, 2011, 33(Suppl 2): 95
[3]	Kong D S, Deng M X, Liu Y, et al. Study of the force and deformation characteristics of subsea mudmat-pile hybrid foundations. Polish Maritime Res, 2018, 25(S3): 43 doi: 10.2478/pomr-2018-0111
[4]	李衛超, 楊敏, 朱碧堂. 砂土中剛性短樁的p-y模型案例研究. 巖土力學, 2015, 36(10):2989 Li W C, Yang M, Zhu B T. Case study of p-y model for short rigid pile in sand. Rock Soil Mech, 2015, 36(10): 2989
[5]	羅如平, 李衛超, 楊敏. 水平循環荷載下海上大直徑單樁累積變形特性. 巖土力學, 2016, 37(增刊 2):607 Luo R P, Li W C, Yang M. Accumulated response of offshore large-diameter monopile under lateral cyclic loading. Rock Soil Mech, 2016, 37(Suppl 2): 607
[6]	Leblanc C, Houlsby G T, Byrne B W. Response of stiff piles to long term cyclic lateral loading. Géotechnique, 2010, 60(2): 79
[7]	Peng J, Clarke B G, Rouainia M. Increasing the resistance of piles subject to cyclic lateral loading. J Geotech Geoenviron Eng, 2011, 137(10): 977 doi: 10.1061/(ASCE)GT.1943-5606.0000504
[8]	郭鵬飛, 周順華, 楊龍才, 等. 考慮橫向慣性效應的非飽和土中單樁的豎向動力響應. 力學學報, 2017, 49(2):344 doi: 10.6052/0459-1879-16-286 Guo P F, Zhou S H, Yang L C, et al. Analytical solution of the vertical dynamic response of rock-socked pile considering transverse inertial effect in unsaturated soil. Chin J Theor Appl Mech, 2017, 49(2): 344 doi: 10.6052/0459-1879-16-286
[9]	張光建. 長期水平循環荷載下大直徑樁的累積位移分析[學位論文]. 杭州: 浙江大學, 2013 Zhang G J. Analysis on Horizontal Displacement of Monopile Foundations under Long-Term Cyclic Later Loading [Dissertation]. Hangzhou: Zhejiang University, 2013
[10]	Basack S, Banerjee A K. Offshore pile foundation subjected to lateral cyclic load in layered soil. Adv Mater Res, 2014, 891-892: 24 doi: 10.4028/www.scientific.net/AMR.891-892.24
[11]	Bhattacharya S, Adhikari S. Experimental validation of soil-structure interaction of offshore wind turbines. Soil Dyn Earthquake Eng, 2011, 31(5-6): 805 doi: 10.1016/j.soildyn.2011.01.004
[12]	朱斌, 熊根, 劉晉超, 等. 砂土中大直徑單樁水平受荷離心模型試驗. 巖土工程學報, 2013, 35(10):1807 Zhu B, Xiong G, Liu J C, et al. Centrifuge modelling of a large-diameter single pile under lateral loads in sand. Chin J Geotech Eng, 2013, 35(10): 1807
[13]	Kuo Y S, Achmus M, Abdel-Rahmen K. Minimum embedded length of cyclic horizontally loaded monopoles. J Geotech Geoenviron Eng, 2012, 138(3): 357 doi: 10.1061/(ASCE)GT.1943-5606.0000602
[14]	Achmus M, Kuo Y S, Abdel-Rahman K, et al. Capacity degradation method for piles under cyclic axial loads. Comput Geotechnics, 2020, 128: 103838 doi: 10.1016/j.compgeo.2020.103838
[15]	Kong D S, Deng M X, Xu Y. Study on calculation of pile sliding interval of large-diameter steel pipe piles on offshore platforms. Math Problems Eng, 2019, 2019: 3549296
[16]	余世章, 李颯. 復合荷載下海上鋼管樁基礎p-y曲線法研究. 水力發電學報, 2018, 37(1):101 doi: 10.11660/slfdxb.20180112 Yu S Z, Li S. P-y curve methods of steel pipe pile foundations under combined loads. J Hydroelectr Eng, 2018, 37(1): 101 doi: 10.11660/slfdxb.20180112
[17]	劉晉超, 熊根, 朱斌, 等. 砂土海床中大直徑單樁水平承載與變形特性. 巖土力學, 2015, 36(2):591 Liu J C, Xiong G, Zhu B, et al. Bearing capacity and deflection behaviors of large diameter monopile foundations in sand seabed. Rock Soil Mech, 2015, 36(2): 591
[18]	劉紅軍, 尹燕京, 常季青. 水平荷載下海上風機單樁基礎樁土相互作用研究. 中國海洋大學學報(自然科學版), 2016, 46(3):113 Liu H J, Yin Y J, Chang J Q. Research on the pile-soil interaction of monopile foundation under horizontal load for offshore wind turbine. Periodic Ocean Univ China, 2016, 46(3): 113
[19]	Kong D S, Deng M X, Zhao Z M. Seismic interaction characteristics of an inclined straight alternating pile group-soil in liquefied ground. Adv Civil Eng, 2019, 2019: 3758286
[20]	孔位學, 芮勇勤, 董寶弟. 巖土材料在非關聯流動法則下剪脹角選取探討. 巖土力學, 2009, 30(11):3278 doi: 10.3969/j.issn.1000-7598.2009.11.010 Kong W X, Rui Y Q, Dong B D. Determination of dilatancy angle for geomaterials under non-associated flow rule. Rock Soil Mech, 2009, 30(11): 3278 doi: 10.3969/j.issn.1000-7598.2009.11.010
[21]	Kong D S, Deng M X, Liu Y, et al. The environmental study on consolidated undrained triaxial compression tests on lightweight soil mixed with rubber chips of scrap tires. Ekoloji, 2018, 27(106): 1503
[22]	費康, 彭劼. ABAQUS巖土工程實例詳解. 北京: 人民郵電出版社, 2016 Fei K, Peng J. Detailed Explanation of ABAQUS Geotechnical Engineering Examples. Beijing: The People’s Posts and Telecommunications Press, 2016
[23]	馮凌云, 李大勇. 砂土中裙式吸力基礎水平循環承載特性的影響因素分析. 工程科學與技術, 2018, 50(6):156 Feng L Y, Li D Y. Analysis of influence factors on cyclic bearing behaviors of skirted suction caissons. Adv Eng Sci, 2018, 50(6): 156
[24]	曹金鳳, 石亦平. ABAQUS有限元分析常見問題解答. 北京: 機械工業出版社, 2009 Cao J F, Shi Y P. Answers to Frequently Asked Questions About ABAQUS Finite Element Analysis. Beijing: China Machine Press, 2009
[25]	孫永鑫. 近海風機超大直徑單樁水平承載特性試驗與數值分析[學位論文]. 杭州: 浙江大學, 2016 Sun Y X. Experimental and Numerical Studies on a Laterally Loaded Monopile Foundation of Offshore Wind Turbine [Dissertation]. Hangzhou: Zhejiang University, 2016
[26]	Kong D S, Bai Y F, Chen Y P, et al. A study on the seismic response characteristics of an oblique pile group-soil-structure with different pile caps. Shock Vib, 2019, 2019: 8141045
[27]	陳新奎. 海上風電超大直徑鋼管樁基礎土塞效應研究[學位論文]. 南京: 東南大學, 2017 Chen X K. Study on Soil Plug Effect of Super-Large Diameter Steel Pipe Pile Foundation of Offshore Wind Turbine [Dissertation]. Nanjing: Southeast University, 2017
[28]	宋波, 趙偉娜, 雙妙. 沖刷深度對海上風電塔地震動力響應的影響分析. 工程科學學報, 2019, 41(10):1351 Song B, Zhao W N, Shuang M. Analysis of the influence of scour depth on the dynamic response of offshore wind turbine towers under earthquake action. Chin J Eng, 2019, 41(10): 1351
[29]	顏廷俊, 張麗穩, 崔日. 海上油田井下油水分離裝置分離效率的數值模擬. 北京化工大學學報(自然科學版), 2012, 05:108 Yan T J, Zhang L W, Cui R. Numerical simulation of the separation efficiency in offshore oil field downhole oil-water separation (DOWS). J Beijing Univ Chem Technol Nat Sci, 2012, 05: 108