ANALYSIS ON PROGRESSIVE FAILURE AND REINFORCEMENT OF WIND TURBINE FOUNDATION WITH FOUNDATION-RING UNDER DYNAMIC LOADS

Li Guojian; Zhao Changyu; Liu Chenming; Liu Shudong; Song Mingcheng; Tan Fang

doi:10.19912/j.0254-0096.tynxb.2024-1981

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (3) : 357-366. DOI: 10.19912/j.0254-0096.tynxb.2024-1981

ANALYSIS ON PROGRESSIVE FAILURE AND REINFORCEMENT OF WIND TURBINE FOUNDATION WITH FOUNDATION-RING UNDER DYNAMIC LOADS

Li Guojian¹, Zhao Changyu¹, Liu Chenming¹, Liu Shudong¹, Song Mingcheng², Tan Fang^2,3

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Abstract

Considering the issues of cracking and slurry leakage resulting from the fatigue damage of a wind turbine foundation with a foundation-ring under long-term wind loads, a three-dimensional calculation model of the wind turbine foundation was established using the midas FEA NX finite element software. This model was employed to simulate the response of the foundation under the measured wind load. The location of cracks and the stress level in critical areas of the wind turbine foundation were analyzed, thereby revealing the failure development process of the foundation. The analysis results indicate that under long-term wind loads, the interface between the foundation ring and the concrete foundation experiences fatigue shear damage, leading to interface disengagement and stress concentration in the radial reinforcement. The swing of wind turbines causes the lower flange to continuously grind the concrete to form a cavity, and the concrete around the foundation ring is repeatedly stamped and broken. To solve the above problems, based on the on-site investigation and video detection of the flange located beneath the foundation ring, it is recommended to utilize structural epoxy adhesive to fill and reinforce the cavities and cracks surrounding the flange, thereby enhancing its structural integrity. The relevant data of the reinforced wind turbine foundation show that the integrity and crack resistance of the reinforced concrete foundation have been effectively enhanced under the same measured wind load, and the reinforced wind turbine is in good operating condition.

Key words

wind turbines / dynamic loads / stress concentration / fatigue damage / reinforcement

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Li Guojian, Zhao Changyu, Liu Chenming, Liu Shudong, Song Mingcheng, Tan Fang. ANALYSIS ON PROGRESSIVE FAILURE AND REINFORCEMENT OF WIND TURBINE FOUNDATION WITH FOUNDATION-RING UNDER DYNAMIC LOADS[J]. Acta Energiae Solaris Sinica. 2026, 47(3): 357-366 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1981

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