ANALYSIS ON LATERAL DEFORMATION BEHAVIOR OF MONOPILE FOUNDATION OF OFFSHORE WIND TURBINE UNDER COMPLEX CONDITIONS

Ren Yanzhong; Han Zhonghe; Tang L&#x000fc;jun

doi:10.19912/j.0254-0096.tynxb.2022-0905

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (10) : 376-383. DOI: 10.19912/j.0254-0096.tynxb.2022-0905

ANALYSIS ON LATERAL DEFORMATION BEHAVIOR OF MONOPILE FOUNDATION OF OFFSHORE WIND TURBINE UNDER COMPLEX CONDITIONS

Ren Yanzhong^1,2, Han Zhonghe¹, Tang Lüjun³

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Abstract

Based on a typical offshore wind farm project with complex conditions in Fujian, this research deeply analyzed the lateral loading behavior of the monopile foundation under complex conditions based on different p-y curve methods and proposed a method to determine the critical pile length of the monopile foundation based on the results of lateral deformation analysis. It is found that the selection of p-y curve in sandy soil stratum has a great influence on the calculation results of lateral deformation of monopile foundation. The lateral displacement and rotation angle of monopile foundation calculated by using the p-y curve in DNVGL specification are smaller than those calculated by considering the“pile diameter effect and initial stiffness correction”. The main reason is that the stiffness of the linear segment of p-y curve in sandy soil recommended by DNVGL specification is too large, which leads to the unsafe application of this method in engineering; There is a critical pile length in a monopile foundation, and its value is closely related to the lateral deformation behavior of the pile.

Key words

offshore wind farm / pile foundation / monopile / lateral deformation

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Ren Yanzhong, Han Zhonghe, Tang Lüjun. ANALYSIS ON LATERAL DEFORMATION BEHAVIOR OF MONOPILE FOUNDATION OF OFFSHORE WIND TURBINE UNDER COMPLEX CONDITIONS[J]. Acta Energiae Solaris Sinica. 2023, 44(10): 376-383 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0905

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