Shape Coefficient and Wind Load Calculation of Hexagonal Transmission Tower

doi:10.11930/j.issn.1004-9649.2017.03.107.06

Abstract

Abstract: The hexagonal tower is rarely applied to transmission lines, and further studies are needed on the rationality of the shape coefficient of hexagonal tower represented by that of quadrilateral tower. For this purpose, two kinds of hexagonal transmission tower models with different solid ratio are established for a series of aerostatic force wind tunnel tests. Based on the test results, the change law of shape coefficient versus wind angles ranging from 0°to 120° is studied. Furthermore, the influences of shape coefficient difference between the hexagonal tower and quadrilateral tower on the calculated tower wind loads are discussed. The study shows that under the wind axis, the shape coefficient of hexagonal tower hexagonal tower presents a period of 60 degrees with the maximum value occurring at the wind angles of 10° and 45°. It is concluded that under the condition of the hexagonal tower shape coefficient being accurately measured, the traditional wind load calculation method used for quadrilateral tower is still applicable to the hexagonal transmission tower, but the calculated wind load of hexagonal transmission tower based on the code-provided shape coefficient is on the risk side with the wind angles ranging within 0~15°.

Key words: transmission tower, wind load, shape coefficient, wind tunnel test, hexagonal transmission tower

CLC Number:

TM753

ZHANG Hongjie, LI Zheng, YANG Fengli, HAN Junke, GONG Bo. Shape Coefficient and Wind Load Calculation of Hexagonal Transmission Tower[J]. Electric Power, 2017, 50(3): 107-112.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2017.03.107.06

https://www.electricpower.com.cn/EN/Y2017/V50/I3/107

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