VALIDATION OF DUAL SCALE MODEL FOR CONCRETE WIND TURBINE TOWERS AND INVESTIGATION OF LOCAL PRESTRESS LOSS

Zhang Junjun; Zhen Li; Huang Hao; Lin Zheng; Liu Jinlong; Chen Gaixin

doi:10.19912/j.0254-0096.tynxb.2024-1386

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (12) : 626-636. DOI: 10.19912/j.0254-0096.tynxb.2024-1386

VALIDATION OF DUAL SCALE MODEL FOR CONCRETE WIND TURBINE TOWERS AND INVESTIGATION OF LOCAL PRESTRESS LOSS

Zhang Junjun^1,2, Zhen Li^1,2, Huang Hao^1,2, Lin Zheng^1,2, Liu Jinlong^1,2, Chen Gaixin^1,2

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Abstract

Compared to traditional steel towers, prestressed concrete wind turbine towers exhibit superior global and local stability, enabling their deployment in complex terrains and for greater hub heights. This study investigates the local and global mechanical properties, as well as the buckling stability, of a full-scale concrete tower under conditions of local symmetric prestress loss in the steel strands. Based on the scale reduction test and the dual scale modeling method. Results demonstrate excellent agreement between the dual scale model predictions and the scaled test data, with relative errors in load and displacement of 0.3% and 5.5%, respectively. For the full-scale model, local edge prestress loss exerts a more significant influence on structural displacement than the case without such loss. Specifically, prestress loss on the windward side results in a 12.2% increase in maximum displacement, while loss on the leeward side causes a 23.6% reduction. Regarding varying magnitudes of prestress loss, tensile stress changes remain minimal, whereas compressive stress changes are pronounced. Linear buckling modes remain largely consistent across different loading conditions, and the location of prestress loss has negligible impact on these modes. In contrast to linear buckling analysis, the critical load derived from non-linear buckling analysis is significantly reduced by 52.3%.

Key words

concrete wind tower / scaled test / dual scale model / prestress loss / buckling analysis

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Zhang Junjun, Zhen Li, Huang Hao, Lin Zheng, Liu Jinlong, Chen Gaixin. VALIDATION OF DUAL SCALE MODEL FOR CONCRETE WIND TURBINE TOWERS AND INVESTIGATION OF LOCAL PRESTRESS LOSS[J]. Acta Energiae Solaris Sinica. 2025, 46(12): 626-636 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1386

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