Structural Engineering and Mechanics

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Wind-rain-induced vibration test and analytical method of high-voltage transmission tower

  • Li, Hong-Nan (Faculty of Infrastructure Engineering, Dalian University of Technology) ;
  • Tang, Shun-Yong (Faculty of Infrastructure Engineering, Dalian University of Technology) ;
  • Yi, Ting-Hua (Faculty of Infrastructure Engineering, Dalian University of Technology)
  • Received : 2012.04.23
  • Accepted : 2013.10.20
  • Published : 2013.11.25
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Abstract

A new computational approach for the rain load on the transmission tower is presented to obtain the responses of system subjected to the wind and rain combined excitations. First of all, according to the similarity theory, the aeroelastic modeling of high-voltage transmission tower is introduced and two kinds of typical aeroelastic models of transmission towers are manufactured for the wind tunnel tests, which are the antelope horn tower and pole tower. And then, a formula for the pressure time history of rain loads on the tower structure is put forward. The dynamic response analyses and experiments for the two kinds of models are carried out under the wind-induced and wind-rain-induced actions with the uniform and turbulent flow. It has been shown that the results of wind-rain-induced responses are bigger than those of only wind-induced responses and the rain load influence on the transmission tower can't be neglected during the strong rainstorm. The results calculated by the proposed method have a good agreement with those by the wind tunnel test. In addition, the wind-rain-induced responses along and across the wind direction are in the same order of response magnitude of towers.

Keywords

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