RESEARCH ON MECHANICAL BEHAVIOR OF CYLINDRICAL WIND TURBINE FOUNDATION WITH CONSTRAINED STRUCTURAL SHEAR KEY

Qi Jingjing; Ye Yining; Jiang Lizhong; Lyu Weirong; Lu Beirong; Wu Jidong

doi:10.19912/j.0254-0096.tynxb.2023-2064

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (4) : 423-433. DOI: 10.19912/j.0254-0096.tynxb.2023-2064

RESEARCH ON MECHANICAL BEHAVIOR OF CYLINDRICAL WIND TURBINE FOUNDATION WITH CONSTRAINED STRUCTURAL SHEAR KEY

Qi Jingjing¹, Ye Yining¹, Jiang Lizhong², Lyu Weirong¹, Lu Beirong¹, Wu Jidong¹

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Abstract

Aiming at the problem that the foundation of the cylindrical wind turbine may be damaged to different degrees under long-term wind load, a kind of cylindrical wind turbine foundation ring with constrained structural shear key is proposed. The foundation concrete can make use of the excellent shear stiffness and anti-cracking performance of the constrained structural shear key, in order to solve the problems of insufficient embedded stiffness strength and toughness of the foundation and insufficient durability of the tower cylinder foundation of the wind turbine. In this paper, through scaling model tests and finite element simulation on traditional stud foundation rings, perforated steel shear key foundation rings and three groups of constrained structural shear key foundation rings with different buried depths, the force transmission mechanism and damage mechanism of constrained structural shear key wind turbine foundation are revealed, and the shear resistance of constrained structural shear key in wind turbine foundation is analyzed. The results show that the constrained structural shear key has stronger interfacial stiffness advantage and significant force transfer and diffusion advantage, and can more effectively connect steel foundation ring and concrete foundation to work together, give full play to the material advantages of concrete and reinforcement, and effectively improve the embedded stiffness and durability of concrete foundation.

Key words

wind turbines / shear strength / composite structure / interface shear / new shear bond / embedding stiffness

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Qi Jingjing, Ye Yining, Jiang Lizhong, Lyu Weirong, Lu Beirong, Wu Jidong. RESEARCH ON MECHANICAL BEHAVIOR OF CYLINDRICAL WIND TURBINE FOUNDATION WITH CONSTRAINED STRUCTURAL SHEAR KEY[J]. Acta Energiae Solaris Sinica. 2025, 46(4): 423-433 https://doi.org/10.19912/j.0254-0096.tynxb.2023-2064

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