Abstract
The transmission tower has the characteristics of high-rise, flexibility and large span, and is particularly sensitive to the wind load. Therefore, the wind load is the control load for the structural design of the transmission tower. At the same time, the fluctuating wind also has a great impact on the structural stability. The wind-induced vibration coefficient is an important parameter for calculating the wind load and pulsating wind. Load code for the design of overhead transmission line (DL/T 5551-2018) has revised the calculation of wind-induced vibration coefficient and adopted the lumped-mass method, but it has not been applied to transmission towers of 66kV or under transmission tower. By comparing the difference between Load code for the design of overhead transmission line (DL/T 5551-2018) and Code for the design of 66kV or under overhead electrical power transmission line (GB 50061-2010), this paper compares and analyzes the theoretical calculation formula, actual tower member stress, tower head displacement and tower foundation force, and obtains the impact of tower wind vibration coefficient calculated by cluster mass method on transmission towers of 66kV and below. The research provides reference and basis for the revision of wind load calculation theory of 66kV or under transmission tower structures in China.
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