输电线路杆塔非焊接Y字形加固技术试验研究

李文斌; 邱智育; 马池; 王伟煌; 陈庆军; 左志亮; 陈剑平; 廖赟

doi:10.13204/j.gyjzG201906060007

输电线路杆塔非焊接Y字形加固技术试验研究

doi: 10.13204/j.gyjzG201906060007

1. 广东省输变电工程有限公司, 广州 510000;
2. 华南理工大学土木与交通学院, 广州 510641;
3. 华南理工大学亚热带建筑科学国家重点试验室, 广州 510641

基金项目:

广东电网科技项目（GDKJQQ20161073）。

详细信息

作者简介:
李文斌,男,1975年出生,硕士,高级工程师。电子信箱:583763104@qq.com

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出版历程
- 收稿日期: 2019-10-25

EXPERIMENTAL RESEARCH ON A NON-WELDING Y-SHAPED STRENGTHENING TECHNIQUE OF POWER TRANSMISSION TOWERS

1. Guangdong Power Transmission and Transformation Engineering Co., Ltd., Guangzhou 510000, China;
2. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China;
3. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510641, China

摘要

摘要: 现存工作年限较长且运行中的输电线路杆塔，其承载力降低，在强风中存在倒塌安全隐患。提出一种可在既有输电塔构件上进行Y字形加固的技术方案，该方案无需焊接，施工方便。针对此方案，完成了1个未加固试件、2个加固试件的轴压试验。结果表明：采用Y字形加固方案的试件，轴向极限承载力有显著提高；两个加固试件的极限承载力分别是未加固试件的1.25和1.53倍，说明该Y字形加固方案可有效提高主材的承载力。由夹具产生的主、副材之间的摩擦力能逐步地将主材截面的轴力传递至加固后的截面，使得加固部件和主材共同受力。在加载后期，各截面的传力效率趋于稳定，经过一定的距离传递后，其传力效率可达到40%~60%。
- 输电线路杆塔 /
- Y字形加固方法 /
- 轴压试验 /
- 传力效率
Abstract: The bearing capacity of the existing power transmission tower which has been in operation for a long time is reduced, and there is a risk of collapse in strong wind. In the paper, a Y-shaped strengthening technical scheme which can be applied to the existing transmission tower members was presented. The scheme does not need welding and is convenient for construction. Axial compression tests on one unstrengthened specimen and two strengthened specimens adopting this scheme were carried out. The results showed that the axial load bearing capacity of the specimen adopting Y-shaped strengthening scheme was significantly improved. The bearing capacity of the two strengthened specimens was 1.25 and 1.53 times higher than that of the unstrengthened one, respectively. It indicated that the Y-shaped strengthening scheme could effectively improve the bearing capacity of the original section. The friction between the original and auxiliary materials generated by the clamps could gradually transmit the axial force of the original section to the strengthened section, making the original materials and the strengthening components resist the load together. In the later loading stage, the force transmission efficiency of each cross section tended to be stable, and after a certain distance from the loading end, the force transmission efficiency could reach 40% to 60%.
- power transmission tower /
- Y-shaped strengthening method /
- axial compression experiment /
- force transmission efficiency

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参考文献(9)

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