Experimental study on the aerodynamic characteristics of combined angle transmission tower subject to skew wind

IF 2.1 4区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Advances in Structural Engineering Pub Date : 2024-03-18 DOI:10.1177/13694332241240658

Guohui Shen, Linghui Que, Hua-Ping Wan

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引用次数: 0

Abstract

The transmission towers served as crucial carriers in the process of power transmission. The combined angle transmission tower of dual-angle steel with cruciform section are relatively a novel type of angle tower, which is being more widely used in transmission lines. The studies on aerodynamic characteristics of combined angle tower in skewed wind are limited. In this paper, the wind tunnel tests are conducted to investigate the aerodynamic characteristics of the combined angle tower, and the high frequency force balance (HFFB) test is introduced to obtain the transverse and longitudinal forces on the tower using the direct force measurement (DFM) method. The drag coefficients and wind load-distribution factors of the combined angle tower are obtained from the wind tunnel tests, and the effects of interference and tower leg spacing on the wind loads of the tower legs are fully explored. It can be found that the aerodynamic coefficients and drag coefficients of the combined angle steel tower leg tend to decrease with the increase of interference members and it also decreases with the decrease of the tower leg spacing. The test wind load-distribution factors of the isolated leg are generally larger than those defined by seven typical codes (e.g., US, EU, Japanese, and Chinese codes) and significantly exceed the code-specified values under partial wind angles. The observations obtained from this study may provide helpful guidance on the wind-resistant design of this relatively novel type of combined angle tower.

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受偏斜风影响的组合角输电塔空气动力特性试验研究

输电塔是电力传输过程中的重要载体。双角钢十字形截面组合角钢输电塔是一种比较新颖的角钢塔，在输电线路中的应用越来越广泛。有关斜风中组合角钢塔空气动力特性的研究还很有限。本文通过风洞试验研究了组合角钢塔的气动特性，并引入高频力平衡（HFFB）试验，利用直接测力（DFM）方法获得了塔上的横向力和纵向力。通过风洞试验获得了组合角塔的阻力系数和风荷载分布系数，并充分探讨了干扰和塔腿间距对塔腿风荷载的影响。结果表明，组合角钢塔腿的空气动力系数和阻力系数随过盈量的增加而减小，随塔腿间距的减小而减小。孤立塔腿的试验风荷载分布系数普遍大于七种典型规范（如美国、欧盟、日本和中国规范）规定的系数，并且在局部风角条件下明显超过规范规定值。本研究的观察结果可为这种相对新型的组合角钢塔的抗风设计提供有益的指导。

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

Advances in Structural Engineering 工程技术-工程：土木

CiteScore

5.00

自引率

11.50%

发文量

230

审稿时长

2.3 months

期刊介绍： Advances in Structural Engineering was established in 1997 and has become one of the major peer-reviewed journals in the field of structural engineering. To better fulfil the mission of the journal, we have recently decided to launch two new features for the journal: (a) invited review papers providing an in-depth exposition of a topic of significant current interest; (b) short papers reporting truly new technologies in structural engineering.