In order to study wind-resistant load-carrying capacity and failure mechanism of high-voltage transmission tower under severe wind storms,one subassemblage of a typical 500 kV transmission tower which was designed following the current code and suffered severe damage during wind storms was fabricated and statically tested under equivalent wind load.The test results showed that failure of structure was caused by torsional-flexural buckling of the main member.The out-of-plane deformation of the cross-bracings...