A unified lateral soil reaction model for monopiles in soft clay considering various length-to-diameter (L/D) ratios
A unified lateral soil reaction model for monopiles in soft clay considering various length-to-diameter (L/D) ratios
复制标题
考虑不同长径 (L/D) 比的软粘土单桩统一侧向土反应模型
DOI:
10.1016/j.oceaneng.2020.107492
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发表时间:
2020-09
影响因子:
5
通讯作者:
Masin David
中科院分区:
文献类型:
--
作者:
Wang Lizhong;Lai Yongqing;Hong Yi;Masin David
Large-diameter monopiles are the most commonly used foundation to support offshore wind turbines. Early designs usually adopted pile diameters (D) between 4 and 6 m, which is recently extended to 8 m and will target 10 m in the future. It is increasingly evident that the existing design method (i.e., API'sp-ymodel) can significantly under-predict the lateral stiffness and capacity of large-diameter monopiles in soft clay, due to ignoring the soil resistances from base shear and base moment which become more pronounces asL/Dreduces. In this study, a two-spring approach is proposed, aiming to predict the lateral behaviour of monopiles with variedL/Dratios in a unified manner. In light of the soil flow mechanisms around monopiles, the pure lateral soil resistance above the rotation point (RP) is quantified using ap-ymodel, while the resistances below the RP including the base shear and base moment are integrated into a moment-rotation spring (characterized by aMR-θRmodel) at the RP. It can naturally recover to ap-ymodel while analyzing flexible piles, whereθR=0 at RP. Formulations of the ‘p-y + MR-θR’ model (including diameter-relatedp-yandMR-θRmodels, and the depth of the RP) are proposed based on the results of a series of well-calibrated 3D numerical models. The proposed model has satisfactorily reproduced a number of field and centrifuge test results on laterally loaded monopiles with a wide range ofL/Dratios (including flexible, semi-rigid and rigid piles), using a unified set of parameters. Compared to the standardp-ymodel, the adoption of the proposed ‘p-y + MR-θR’ model is shown to substantially reduce design conservatism.
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影响因子:
3.3
作者:
Hong Yi;Wang Lizhong;Zhang Jianfeng;Gao Zhiwei
通讯作者:
Gao Zhiwei
DOI:
10.1680/jgeot.18.pisa.005
发表时间:
2020-10
期刊:
Géotechnique
影响因子:
--
作者:
L. Zdravković;D. Taborda;D. Potts;D. Abadías;H. Burd;B. Byrne;K. Gavin;G. Houlsby;R. Jardine-R.-Jard
通讯作者:
L. Zdravković;D. Taborda;D. Potts;D. Abadías;H. Burd;B. Byrne;K. Gavin;G. Houlsby;R. Jardine-R.-Jard
DOI:
10.1002/nag.416
发表时间:
2005-04-10
影响因子:
4
作者:
Masín, D
通讯作者:
Masín, D
DOI:
10.1061/40865(197)19
发表时间:
2006-05
期刊:
--
影响因子:
--
作者:
D. Dewaikar;P. Patil
通讯作者:
D. Dewaikar;P. Patil
影响因子:
4.3
作者:
Bin Zhu;Kai Wen;Deqiong Kong;Zhoujie Zhu;Lujun Wang
通讯作者:
Lujun Wang