The Vortex-Shedding Induced Vibration of Transmission Steel Tubular Tower

Tubular tower is widely used as high-load tower for transmission line. Some circular-section members tend to present vortex-shedding induced across-wind vibration under low wind speed. This is supposed to be treated properly in structural design to well handle conflict between structural safety and economy. In the paper, based on theoretical analysis on vortex-shedding induced vibration in conjunction with results of dynamic property test on tubular members of different connection types and wind tunnel experiment on vibration response, theoretical method for calculating vortex-shedding induced vibration, as well as reasonable limit value of vibration critical wind speed, are put forward.