STUDY ON BEARING CAPACITY BEHAVIOUR OF MONOPILE FOUNDATION FOR OFFSHORE WIND TURBINE UNDER LATERALLY CYCLIC LOADING

Gao Luchao; Zhang Jisheng; Yang Lihua; Yao Zhongyuan; Zhang Guanwu; Chen Hao

doi:10.19912/j.0254-0096.tynxb.2023-1447

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (1) : 184-191. DOI: 10.19912/j.0254-0096.tynxb.2023-1447

STUDY ON BEARING CAPACITY BEHAVIOUR OF MONOPILE FOUNDATION FOR OFFSHORE WIND TURBINE UNDER LATERALLY CYCLIC LOADING

Gao Luchao^1,2, Zhang Jisheng², Yang Lihua¹, Yao Zhongyuan¹, Zhang Guanwu¹, Chen Hao²

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Abstract

To study on the bearing behaviour of large-diameter piles of offshore wind turbine under laterally cyclic loading, based on conical strain wedge model of laterally loading pile, the p-y curves model were set up with the soil properties of continuity and nonlinear. Considering the size effect of large-diameter piles, the part below the rotation point was equivalent to the rotating spring. With the ultimate balance theory of the soil, the hyperbola function is used to present the relationship between the rotation resistance torque and the angle, and then the double spring calculation model of “p-y+M_R-θ_R” model for large-diameter piles. The stiffness attenuation model of clay was introduced to establish the calculation method of the laterally cyclic effect of large-diameter piles of offshore wind turbine. The cases analysis show that the theoretical calculated values of this method are relatively consistent with the measured values, which verifies the effectiveness of the simplified calculation method. This study can provide theoretical reference significance for analyzing the loading response of large diameter piles under cyclic loading. This paper can provide theoretical reference for the pile foundation design of offshore wind turbines.

Key words

offshore wind turbines / pile foundation / cyclic loading / bearing capacity / soft clay

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Gao Luchao, Zhang Jisheng, Yang Lihua, Yao Zhongyuan, Zhang Guanwu, Chen Hao. STUDY ON BEARING CAPACITY BEHAVIOUR OF MONOPILE FOUNDATION FOR OFFSHORE WIND TURBINE UNDER LATERALLY CYCLIC LOADING[J]. Acta Energiae Solaris Sinica. 2025, 46(1): 184-191 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1447

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