RESEARCH ON SIMPLIFIED p-y CURVES OF LATERAL LOADED MONOPILE FOR OFFSHORE WIND TURBINES

Chen Xiaolu; Guan Chunyu; Zhang Guanwu; Dai Guoliang; Gao Luchao; Wan Zhihui

doi:10.19912/j.0254-0096.tynxb.2020-0427

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (5) : 366-371. DOI: 10.19912/j.0254-0096.tynxb.2020-0427

RESEARCH ON SIMPLIFIED p-y CURVES OF LATERAL LOADED MONOPILE FOR OFFSHORE WIND TURBINES

Chen Xiaolu¹, Guan Chunyu¹, Zhang Guanwu¹, Dai Guoliang², Gao Luchao², Wan Zhihui²

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Abstract

Field tests of lateral loading monopile in offshore wind turbines （OWT） were performed to obtain the relationships of load-displacement curves, deformation and moment of pile shaft, which can be reveal the rule of pile-soil interaction. A simplified p-y curves model are proposed for researching the lateral bearing behavior in clay and sand, considering with the depth effect of soil to modify the initial subgrade modulus. The feasibility and validity of the simplified method was validated to comparing with the measured and calculated values of API. In addition, the parameter sensitivity of limit resistance and shape factors is also researched. The results show the relative error of pile head displacement and maximum bending moment obtained by field test and simplified method is 15.6% and 3.2%, respectively. The simplified method can improve the calculation accuracy. Parameter of soil limit resistance and parameter of soil shape have a remarkable influence on the internal force and deformation of the lateral loaded. The higher values are recommended in monopile design based on deformation control.

Key words

offshore wind turbines / pile foundations / bearing capacity / p-y curves / field test

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Chen Xiaolu, Guan Chunyu, Zhang Guanwu, Dai Guoliang, Gao Luchao, Wan Zhihui. RESEARCH ON SIMPLIFIED p-y CURVES OF LATERAL LOADED MONOPILE FOR OFFSHORE WIND TURBINES[J]. Acta Energiae Solaris Sinica. 2022, 43(5): 366-371 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0427

References

[1] GWEC. Global wind report2019[R]. Global wind energy council (GWEC), 2020.
[2] WU X N, HU Y, LI Y, et al.Foundations of offshore wind turbines: a review[J]. Renewable and sustainable energy reviews, 2019, 104: 379-393.
[3] MATLOCK H.Correlations for design of laterally loaded piles in soft clay[C]//Proceeding of the 2nd Annual Offshore Technology Conference, Houston, 1970: 577-594.
[4] REESE L C, COX W R, KOOP F D.Analysis of laterally loaded piles in sand[C]//Proceeding of the 6th Annual Offshore Technology Conference, Dallas, 1974: 473-485.
[5] AMERICAN PETROLEM INSTITUTE.Recommended practice for planning designing and constructing fixed offshore platforms-working stress design[S]. Washington, DC: American Petroleum Institute Publishing Services, 2005.
[6] KIM B T, KIM N K, LEE W J, et al.Experimental load-transfer curves of laterally loaded piles in Nak-Dong river sand[J]. Journal of geotechnical and geoenvironmental engineering, 2004, 130(4): 416-425.
[7] 罗仑博, 王媛, 翟恩地, 等. 基于现场试验的钢管桩分层土p-y曲线研究[J]. 太阳能学报, 2019, 40(11): 3258-3264.
LUO L B, WANG Y, ZHAI E D, et al.Study on p-y curves of monopile in layered soil based on field test[J]. Acta energiae solaris sinica, 2019, 40(11): 3258-3264.
[8] KIM Y H, JEONG S, LEE S.Wedge failure analysis of soil resistance on laterally load piles in clay[J]. Journal of geotechnical and geoenvironmental engineering, 2011, 137(7): 678-694.
[9] 朱斌, 杨永垚, 余振刚, 等. 海洋高桩基础水平单调及循环加载现场试验[J]. 岩土工程学报, 2012, 34(6): 1028-1037.
ZHU B, YANG Y Y, YU Z G, et al.Field tests on lateral monotonic and cyclic loading of offshore elevated piles[J]. Chinese journal of geotechnical engineering, 2012, 34(6): 1028-1037.
[10] JTJ 255-2002, 港口工程基桩静载荷试验规程[S].
JTJ 255-2002, Specification for testing of pile under static load in harbor engineering[S].
[11] XU D S, XU X Y, LI W, et al.Field experiments on laterally loaded piles for an offshore wind farm[J]. Marines structures, 2020, 69: 102684.
[12] 翟恩地, 徐海滨, 郭胜山, 等. 响水海上风电钢管桩基础水平承载特性对比研究[J]. 太阳能学报, 2019, 40(3): 681-686.
ZHAI E D, XU H B, GUO S S, et al.Comparative study on horizontal bearing capacity of steel pipe pile for Xiangshui offshore wind farm[J]. Acta energiae solaris sinica, 2019, 40(3): 681-686.
[13] BOUAFIA A.p-y curves for single piles in fine soils from the prebored pressuremeter-a new approach[C]// Geotechnical Engineering for Disaster Mitigation and Rehabilitation and Highway Engineering Semarang, 2011: 567-572.
[14] 邓涛, 林聪煜, 柳志鹏, 等. 大位移条件下水平受荷单桩的简明弹塑性计算方法[J]. 岩土力学, 2020, 41(1): 95-102.
DENG T, LIN C Y, LIU Z P, et al.A concise elastoplastic method for laterally loaded single pile with large displacement[J]. Rock and soil mechanics, 2020, 41(1): 95-102.
[15] 俞剑, 张陈蓉, 黄茂松. 被动状态下地埋管线的地基模量[J]. 岩石力学与工程学报, 2012, 31(1): 123-132.
YU J, ZHANG C R, HUANG M S.Subgrade modulus of underground pipelines subjected to soil movements[J]. Chinese journal of rock mechanics and engineering, 2012, 31(1): 123-132.
[16] VESIC A B.Bending of beams resting on isotropic elastic solids[J]. Journal of the engineering mechanics division, 1961, 87(2): 35-53.
[17] GUO W D, ZHU B T.Laterally loaded fixed-headed piles in sand[C]//9th Australia New Zeland Conference on Geomechanics, Auckland, New Zealand, 2004: 88-94.
[18] 梁发云. 基于多孔介质理论的地基土变形模量估算方法[J]. 岩土力学, 2004, 25(7): 1147-1150.
LIANG F Y.An approach for estimating deformation modulus of subsoil based on porous medium theory[J]. Rock and soil mechanics, 2004, 25(7): 1147-1150.