局部变形对等边单角钢杆件轴心受压承载力影响研究

傅本钊; 程建平; 林瑞宗

doi:10.3724/j.gyjzG23072609

局部变形对等边单角钢杆件轴心受压承载力影响研究

doi: 10.3724/j.gyjzG23072609

国网福建省电力有限公司经济技术研究院, 福州 350012

基金项目:

国网福建省电力有限公司科技项目（52130N220008）。

详细信息

作者简介:
傅本钊，硕士，工程师，主要从事输电线路设计技术及钢结构研究。电子信箱:fbz_fjdl@163.com

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出版历程
- 收稿日期: 2023-07-26
- 网络出版日期: 2025-06-07
- 刊出日期: 2025-04-01

Research on the Effects of Local Deformation on the Bearing Capacity of Equilateral Single-Angle Steel Members Under Axial Compression

State Grid Fujian Power Economic Research Institute, Fuzhou 350012, China

摘要

摘要: 角钢杆件的局部变形将导致构件承载力的显著下降。对含局部变形的等边单角钢杆件轴心受压试验结果进行有限元模型对比验证，同时对不同长细比下等边单角钢压杆进行了有限元数值分析，研究局部变形类型、变形尺寸、长细比、变形位置对等边单角钢压杆轴心抗压承载力的影响。结果表明：不同程度局部变形下，角钢极限承载力下降34.70%~58.38%；角钢极限承载力随着长细比的增大先迅速减小后缓慢增大；局部变形对角钢承载力的影响随着长细比的增加逐渐减小；当变形量超过0.3W（W为角钢翼缘宽度）时，随着距杆件边缘距离的增大，角钢极限承载力呈现出近似线性下降趋势。
- 局部变形 /
- 等边单角钢杆件 /
- 抗压承载力 /
- 有限元 /
- 长细比
Abstract: The local deformation of angle steel members will significantly reduce the bearing capacity of the components. In the paper， finite element model comparison and validation were performed on the axial compression test results of equilateral single-angle steel members with local deformation. Meanwhile， finite element numerical analysis was conducted on equilateral angle steel compression members with different slenderness ratios to study the influence of local deformation type， deformation size， slenderness ratio， and deformation location on the bearing capacity of equilateral angle steel members under axial compression. The results showed that under different degrees of local deformation， the ultimate bearing capacity of angle steel decreased by 34.70% to 58.38%. Furthermore， the ultimate bearing capacity of angle steel decreased rapidly and then slowly increased with the increase of slenderness ratio. The influence of local deformation on the bearing capacity of angle steel decreased gradually with the increase of slenderness ratio. When the deformation size exceeded 0.3W（W was the width of the angle steel flange）， the ultimate bearing capacity of angle steel presented an approximately linear decrease trend with the increase of distance from the edge of the member.
- local deformation /
- equilateral single-angle steel members /
- compressive bearing capacity /
- finite element /
- slenderness ratio

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