鉄塔腹材の後流渦励振に関する研究

概要

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This study clarifies in a wind tunnel test the characteristics of wind forces on a diagonalbracing member in the wake of a column member of a steel latticed tower with members of circularcross-section. Furthermore, the wind responses of the bracing member are evaluated by using thewind forces in the modal analysis, and then compared with the responses obtained from the fullscalemeasurement.The surface of test model was roughened artificially by small circular section strings to improvelocal similarity with regard to Reynolds number to the full-scale measurements.When the entire bracing member is within the wake of the column, the fluctuating wind forceson are generated by the shedding vortex of the column. When only part of bracing is in the wakeof the column, the fluctuating wind forces are composed of the components of the shedding vortexof the bracing member and the column.It is clarified that the evaluated wind responses of bracing member are in good agreement withthe full-scale measurement values, and are mainly affected by the shedding vortex of the windwardcolumn.
一般社団法人日本風工学会の論文