Abstract

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Title:: Experiment on Characteristics of Wind Loads of High-rise Building with Rounded Square Section

Author(s):: LI Qiu-sheng; ZHOU Ya-ping; LI Jian-cheng; LI Yi; College of Civil Engineering, Hunan University

Keywords:: high-rise building; square section; wind tunnel test; three-component coefficient; wind load power spectrum; shape coefficient

Abstract:: The pressure test was carried out on the rigid model of square section highrise building with round corner rate of 25%, and the characteristics of wind loads were studied. The change rules of threecomponent coefficient and base moment coefficient along with the wind angle were analyzed. The fitting results of mean value of drag coefficient, root square deviation of drag coefficient and lift coefficient were given. The wind load power spectrum under the most unfavorable wind angle was analyzed, and fitted by empirical formula. The shape coefficient was analyzed and compared with the square shape coefficient of code. The results show that the wind load can be significantly reduced when the corners of square building are rounded, and the sharp and narrow single peak phenomenon of the power spectrum curve can be eliminated. The wind load characteristic is changed in essence, and is beneficial for the wind resistant design of the main structure. The negative pressure in the corner area is larger, which is disadvantageous to the wind resistance design of curtain wall.