Calculation method of stability bearing capacity of transmission tower angle steel considering semi-rigid constraint

IF 1.1 Q4 MECHANICS

Curved and Layered Structures Pub Date : 2022-01-01 DOI:10.1515/cls-2022-0017

Feng Qiu, J. Qiu, Heng Feng, Huajie Wang, H. Qian, Xiao-fei Jin, Kai-ming Wang, F. Fan

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引用次数: 0

Abstract

Abstract The angle steel member is the most commonly used component form of the transmission tower structure. Considering its connection characteristics, we must deal with its stability analysis under semi-rigid constraint conditions for the proper study of the overall structure’s mechanical performance. Therefore, in order to establish a simple and high-precision method suitable for the ultimate bearing capacity analysis of the transmission tower, we build the refined finite element models of typical steel tower joints, analyze its moment-rotation curve and utilize simulation technique of spring elements to acquire the calculation method of its single angle stability bearing capacity, which is considering initial imperfection and residual stress. Furthermore, we analyze its bearing capacity under different constraint conditions such as rigid, semi-rigid and articulated connection. The results show that it is necessary to consider joint stiffness in the bearing capacity analyses. Finally, it’s confirmed that the calculation results of this method agree well with the experimental data, which validates its high accuracy. Therefore, the method provides technical support for high efficient component stability simulation in overall stability analyses of the transmission steel tower.

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考虑半刚性约束的输电塔角钢稳定承载力计算方法

角钢构件是输电塔结构中最常用的构件形式。考虑到其连接特性，必须对其进行半刚性约束条件下的稳定性分析，才能正确地研究其整体结构的力学性能。因此，为了建立一种简单、高精度的适用于输电塔极限承载力分析的方法，我们建立了典型钢塔节点的精细有限元模型，分析了其弯矩-转角曲线，并利用弹簧单元模拟技术获得了其单角稳定承载力的计算方法，其考虑了初始缺陷和残余应力。此外，我们还分析了其在刚性、半刚性和铰接等不同约束条件下的承载力。结果表明，在承载力分析中有必要考虑节点刚度。最后，验证了该方法的计算结果与实验数据吻合良好，验证了其高精度。因此，该方法为输电铁塔整体稳定性分析中高效的构件稳定性模拟提供了技术支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Curved and Layered Structures MECHANICS-

CiteScore

2.60

自引率

13.30%

发文量

审稿时长

14 weeks

期刊介绍： The aim of Curved and Layered Structures is to become a premier source of knowledge and a worldwide-recognized platform of research and knowledge exchange for scientists of different disciplinary origins and backgrounds (e.g., civil, mechanical, marine, aerospace engineers and architects). The journal publishes research papers from a broad range of topics and approaches including structural mechanics, computational mechanics, engineering structures, architectural design, wind engineering, aerospace engineering, naval engineering, structural stability, structural dynamics, structural stability/reliability, experimental modeling and smart structures. Therefore, the Journal accepts both theoretical and applied contributions in all subfields of structural mechanics as long as they contribute in a broad sense to the core theme.