Random Wind-Induced Dynamic Response of Long-Span Transmission Tower By Improved Explicit Integration Method

With the complex interaction between wind and structure,transmission tower belongs to wind-sensitive structures and the wind load becomes the main problem of the structure design.Based on the engineering background of a 185 m high 500 kV transmission tower,a precise finite element model was established and the vibration characteristics of structure have been obtained.The time history of fluctuating wind load was accurately simulated by considering the spatial correlation of Kaimal wind spectrum.With the advantages of improved explicit integration method,the wind-induced vibration responses of transmission tower were obtained in the time domain.The characteristics of Mean displacement、 Rms displacement and Rms acceleration at different layer of transmission tower have been analyzed in a detailed.Mean-while,the wind-induced vibration coefficient at different layer of transmission tower were also studied and compared,respectively.Through research,some characteristics of wind-induced vibration of transmission tower were revealed and the procedure and the results presented in this paper can be used as reference for the design of transmission tower.