Abstract

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Title:: Effects of Turbulence Parameters on Surface Average Wind Load of Rectangular Structure

Author(s):: BAI Hua; HUI Cheng-yu; LIU Jian-xin; School of Highway, Chang’an University

Keywords:: wind tunnel test; turbulence intensity; turbulence integral scale; wind pressure; body-form coefficient

Abstract:: In order to obtain the laws about the effects of turbulent parameters on structural surface wind pressure distribution, the grid turbulence generators were used in wind tunnel to generate some identical turbulence intensities, different turbulence integral scale wind fields, and some different turbulence intensities, identical turbulence integral scale wind fields to study rectangular structural surface wind pressure distribution. Some correction formulas accounted for these influence were propounded. The results show that rectangular structural body-form coefficients in the positive pressure zone increase with the increasing of turbulence intensity, but the absolute values of the body-form coefficients in the negative pressure zone decrease. The change of wind pressure in the positive pressure zone has no relation with structural size. The body-form coefficients in the negative zone are influenced by not only turbulence intensity, but also structural size. With the rise of the turbulence integral scale, the absolute values of rectangular structure body-form coefficient increase, but the ranges of different regions are irregular and uniform correction is difficult.