Journal of Shandong University(Engineering Science) ›› 2026, Vol. 56 ›› Issue (1): 122-132.doi: 10.6040/j.issn.1672-3961.0.2024.205

• Civil Engineering • Previous Articles    

Study on load carrying performance enhancement and optimization of reinforcing members for power transmission towers in service

ZHANG Liang1, NIU Kai1, XU Weihao1, ZHAI Mengqi1, JIN Qingtong2, LIU Juncai2, TIAN Li2*   

  1. ZHANG Liang1, NIU Kai1, XU Weihao1, ZHAI Mengqi1, JIN Qingtong2, LIU Juncai2, TIAN Li2*(1. State Grid Henan Economic Research Institute, Zhengzhou 450052, Henan, China;
    2. School of Civil Engineering, Shandong University, Jinan 250061, Shandong, China
  • Published:2026-02-03

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Abstract: This paper focused on a novel cross-type non-destructive reinforcement technique aimed at addressing member buckling failure, which was a primary cause of transmission tower collapses. Through a combination of static loading tests and finite element analysis, a comprehensive assessment was made of the damage modes, load-bearing performance, and stress distribution of the reinforced members. The research further investigated the effects of key parameters, such as member slenderness ratio, width-to-thickness ratio, number of fixtures, and the specifications and strength of the reinforcing materials on the ultimate compressive load capacity of the reinforced members. The findings revealed that the proposed reinforcement method significantly enhanced the load-bearing performance, with the ultimate load capacity increasing by over 14% after reinforcement. Additionally, it was found that higher slenderness ratios were correlated with lower ultimate compressive capacities of the reinforced members, though the reinforcing effect became more pronounced. As the width-to-thickness ratio of the main reinforcing material decreased, the improvement in ultimate load capacity also diminished. Moreover, increasing the number of fixtures to a certain threshold stabilized the ultimate compressive load capacity of the reinforced members. Lastly, while the specifications and strength of the reinforcing materials did exert some influence, their overall impact was relatively limited. Symbol`@@

Key words: transmission tower, angle steel components, non-destructive reinforcement program, ultimate bearing capacity, parametric analysis

CLC Number: 

  • TU392.1
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