Abstract
Since 1991, the authors have been observing wind in a mountainous area and wind responses of a large power transmission tower constructed in this area. The purpose of these observation is to clarify the wind characteristics and wind responses of power transmission towers. This paper describes the wind characteristics and the wind responses of this transmission tower obtained from full-scale measurements. A wind tunnel test was also conducted on a two-dimensional mountain to investigate the flow around it. Finally, a wind response analysis was conducted on the transmission tower on the basis of these examinations. The wind response analysis results for the blow-down flow on the leeward slope of the mountain corresponded closely with the measurements. This shows that the evaluation of the blow-down angle is also important in the wind response analysis of the transmission tower in the mountainous area.
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