Abstract

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Keywords:: super high-rise building; wind tunnel test; wind-induced vibration; wind vibration coefficient

Abstract:: Aiming at the problem of the wind-induced response calculated by code was not accurate, the super high-rise building of Xi’an Global Trade Center was taken to be example. Firstly, wind load of every floor was got through wind tunnel test. Secondly, the ANSYS parametric design language was used to compile one calculation program to calculate the wind-induced vibration coefficients and equivalent aerostatic wind load. Then, the wind-resistant performance was studied. The results show that the extremum wind-induced vibration coefficients are founded in the middle of structure when wind attack angle is 90°. Meanwhile, the along-wind displacement and internal force of windward side also reach the maximum. On the contrary, the across-wind wind-induced response reaches minimum. When the wind attack angle is between 20° and 70°, the displacement wind-induced coefficients are increased with the increase of building and the maximum value occurs on the top floor. The peak torsional acceleration decreases firstly and then increases with the change of wind attack angle in every zone. Especially, when the wind attack angle is about 45°, the torsional deformation and base torsion reach maximum. Consequently, the new method, which combines the wind tunnel test with FEA, can provide some meaning reference for similar project.