服役输电塔加固构件承载性能提升及优化研究

doi:10.6040/j.issn.1672-3961.0.2024.205

摘要/Abstract

摘要： 由于构件屈曲失效是输电塔发生连续性倒塌破坏的主要因素,提出一种十字型无损加固措施,通过静力加载试验和有限元模拟对比分析加固构件的破坏模式、承载性能以及应力分布规律。研究构件长细比、宽厚比、夹具数量和加固材规格、钢级等参数对加固构件极限受压承载力的影响规律。结果表明:本研究提出的加固方案效果良好,加固后极限承载力提升14%以上;长细比越大,加固构件极限受压承载力越小,加固构件的加固效果越显著;随着被加固主材宽厚比减小,加固构件极限承载力的提升幅度下降;当夹具增加到一定数量时,加固构件的极限受压承载力趋于稳定;加固材规格和钢级对加固构件影响较小。

关键词: 输电塔, 角钢构件, 无损加固方案, 极限承载力, 参数化分析

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

中图分类号:

TU392.1

张亮,牛凯,徐尉豪,翟孟琪,靳庆通,刘俊才,田利. 服役输电塔加固构件承载性能提升及优化研究[J]. 山东大学学报 (工学版), 2026, 56(1): 122-132.

ZHANG Liang, NIU Kai, XU Weihao, ZHAI Mengqi, JIN Qingtong, LIU Juncai, TIAN Li. Study on load carrying performance enhancement and optimization of reinforcing members for power transmission towers in service[J]. Journal of Shandong University(Engineering Science), 2026, 56(1): 122-132.

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