A modified p-y curve model of large-monopiles of offshore wind power plants

被引：0

作者：

Sun Y.-L. ^{[1
]}

Xu C.-S. ^{[1
]}

Du X.-L. ^{[1
]}

Du X.-P. ^{[2
]}

Xi R.-Q. ^{[1
]}

机构：

[1] Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing

[2] Water Conservancy and Hydropower Investigation and Design Institute of Baoding, Baoding, Baoding

来源：

Gongcheng Lixue/Engineering Mechanics | 2021年 / 38卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Diameter; Monopile; Offshore wind power; p-y curve model; Soil depth;

D O I：

10.6052/j.issn.1000-4750.2020.01.0051

中图分类号：

学科分类号：

摘要：

The monopile is one of the most common solutions for the foundation of offshore wind power plants. The p-y curve recommended by API is commonly used to obtain the horizontal displacement of a monopile. For piles of a more than 2 m diameter, the p-y curve model overestimates the initial stiffness of subgrade reaction and yields inaccurate horizontal displacement. An evaluation of the current p-y method was made to obtain the key factors responsible for overestimating the initial stiffness of subgrade reaction. These key factors were amended. A modified p-y curve model was proposed in which the nonlinear impact of the dimeter and depth on the initial stiffness K was considered based on the calculation results of FLAC3D. The developed p-y curve model was compared with test data and the results of the current p-y curve and the previous modified model. The results show that the good agreement between the calculated results of the developed modified p-y model and test values verified the rationality of the modified p-y model. Copyright ©2021 Engineering Mechanics. All rights reserved.

引用

页码：44 / 53

页数：9

共 33 条

[21] Negro V, Lopez-Gutierrez J S, Esteban M D, Et al., Monopiles in offshore wind: Preliminary estimate of main dimensions, Ocean Engineering, 133, 15, pp. 253-261, (2017)
[22] Stevens J B, Audibert J M E., Re-examination of p-y curve formulations, 11th Annual Offshore Technology Conference, 34, 2, pp. 261-269, (1979)
[23] Technical code for building pile foundations, (2008)
[24] Li Guangxin, Advanced soil mechanics, (2004)
[25] Li W C, Zhu B, Yang M., Static response of monopile to lateral load in over-consolidated dense sand, Journal of Geotechnical and Geoenvironmental Engineering, 143, 7, pp. 1-12, (2017)
[26] Chen Yumin, Xu Dingping, fundamentals and engineering applications, (2009)
[27] Luo R I, Yang M, Li W C., Numerical study of diameter effect on accumulated deformation of laterally loaded monopiles in sand, European Journal of Environmental and Civil Eogineering, 77, pp. 911-921, (2018)
[28] Thieken K, Achmus M, Lemke K., A new static p-y approach for piles with arbitrary dimensions in sand, Geotechnik, 38, 4, pp. 267-288, (2015)
[29] Georgiadis M, Anagnostopoulos C, Saflekou S., Centrifugal testing of laterally loaded piles in sand, Canadian Geotechnical Journal, 29, 2, pp. 208-216, (1992)
[30] Kim B T, Kim N K, Lee W J, Et al., Experimental load-transfer curves of laterally loaded piles in Nak-Dong River sand, Journal of Geotechnical & Geoenvironmental Engineering, 130, 4, pp. 416-425, (2004)

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