Calculation Method of Wind Loads Acting on Transmission Towers Based on Drag Coefficients of Single Members

YANG Fengli; SHAO Shuai

doi:10.13204/j.gyjzG21081101

Volume 52 Issue 8

Aug. 2022

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YANG Fengli, SHAO Shuai. Calculation Method of Wind Loads Acting on Transmission Towers Based on Drag Coefficients of Single Members[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(8): 16-21. doi: 10.13204/j.gyjzG21081101

Citation:

YANG Fengli, SHAO Shuai. Calculation Method of Wind Loads Acting on Transmission Towers Based on Drag Coefficients of Single Members[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(8): 16-21. doi: 10.13204/j.gyjzG21081101

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Calculation Method of Wind Loads Acting on Transmission Towers Based on Drag Coefficients of Single Members

doi: 10.13204/j.gyjzG21081101

China Electric Power Research Institute, Beijing 100055, China

Received Date: 2021-08-11
Available Online: 2022-12-01

Abstract

Abstract

By considering the included angle between the front face of tower segments and the vertical plane, a refined JEC calculation method of wind loads acting on the frontal face and the segment of transmission towers based on the drag coefficients of single member was proposed, which was also called member assembly method. Drag coefficients of the frontal faces and segments of transmission towers with most commonly used solidarity ratios by member assembly method were calculated. Effects of the modification of main member slenderness ratio on drag coefficients were discussed. Drag coefficients calculated by the member assembly method were compared with those values regulated by total calculation method in applicable standards. The drag coefficients of tower segments calculated by the total calculation method in Chinese standard were lower than the member assembly method. Drag coefficients of tower segments calculated by the total calculation method in BS and JEC standards were close to the values calculated by the member assembly method. The relative variations of drag coefficients for tower segments with different solidarity ratios were lower than 10%. Drag coefficients by wind tunnel tests and the member assembly method for frontal faces and segments of typical transmission towers were compared. The relative variations were 5.7% and 7.5%, respectively. Property of the calculation method of wind loads acting on transmission towers based on single member drag coefficients was verified.
- member,
- drag coefficient,
- transmission tower,
- slenderness ratio,
- assembly method

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References(15)

References

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