单肢连接角钢玻纤增强聚氨酯（GRPU）无损加固后承压性能提升效果研究

徐彬; 邱俊霞; 龚正轩; 冯衡; 曾二贤; 张志伟; 钱宏亮; 王化杰

doi:10.3724/j.gyjzG24103103

单肢连接角钢玻纤增强聚氨酯（GRPU）无损加固后承压性能提升效果研究

doi: 10.3724/j.gyjzG24103103

1. 中国电力工程顾问集团中南电力设计院有限公司, 武汉 430061;
2. 哈尔滨工业大学土木工程学院, 哈尔滨 150001;
3. 哈尔滨工业大学(威海)土木工程系, 山东威海 264209

详细信息

作者简介:
徐彬,硕士,高级工程师,主要从事输电线路杆塔设计和基础设计工作。

通讯作者:
邱俊霞,博士研究生,Junxia_Qiu@163.com。

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出版历程
- 收稿日期: 2024-10-31
- 网络出版日期: 2026-06-06
- 刊出日期: 2026-04-20

Research on the Enhancement of Compressive Performance in GRPU Non-Destructively Reinforced Single-Limb Angle Connections

1. Central Southern China Electric Power Design Institute Co., Ltd. of China Power Engineering Consulting Group, Wuhan 430061, China;
2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150001, China;
3. Department of Civil Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China

摘要

摘要: 随着电网规模的不断扩大和电力需求的日益增长，输电塔的荷载需求会不断增大，对其关键构件进行无损加固研究对提升其结构功能、延长其使用寿命具有重要的理论意义和应用价值。以轻质高强的玻纤增强聚氨酯（GRPU）替代传统加固中的钢材，以输电塔常用的斜材角钢（单肢连接角钢）为对象，基于无损双侧加固方案，建立了单肢连接角钢加固前后的精细化有限元模型，设计并开展了单肢连接角钢承压试验，验证了有限元模拟的可行性和准确性；分析了加固比和构件长细比两个参数对单肢连接角钢加固构件破坏模式和承载能力的影响，揭示了GRPU无损加固方案的加固机理。结果表明：加固材可以限制构件扭转变形，提升构件抗弯刚度，从而提升构件承载力；随着角钢长细比、加固比增大，加固效果不断增大。最后，给出了单肢连接角钢的加固比取值建议。
- 输电塔 /
- 单肢连接角钢 /
- GRPU /
- 无损加固 /
- 有限元分析 /
- 抗压能力
Abstract: With the continuous expansion of the power grid scale and the increasing demand for electricity， the load demand of transmission towers continues to rise. Studying the non-destructive reinforcement of their key components is of great theoretical significance and practical value for improving their structural function and extending their service life. Lightweight and high-strength glass-fiber reinforced polyurethane （GRPU） is used to replace steel in traditional reinforcement， and the inclined angle （single-limb angle） commonly used in transmission towers is selected as the research object. A refined finite element model of the single-limb angle before and after reinforcement was established based on the non-destructive double-sided reinforcement scheme. A compression test of the single-limb angle was designed and conducted to verify the accuracy of the finite element simulation， and the effects of the two parameters， namely reinforcement ratio and slenderness ratio. were investigated. The effects of reinforcement ratio and slenderness ratio on the failure mode and bearing capacity of reinforced single-limb angle components were analyzed， and the reinforcement mechanism of the GRPU non-destructive reinforcement scheme was revealed. The results showed that the reinforcement limited the torsional deformation of the components and improved their bending stiffness， thereby enhancing the bearing capacity of the members； with the increase of the slenderness ratio and reinforcement ratio， the reinforcement effect continued to improve. Finally， a reinforcement ratio for single-limb angles was proposed.
- transmission tower /
- single-limb angle /
- GRPU /
- non-destructive reinforcement /
- finite element analysis /
- compressive capacity

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