Discussion of Simplified Evaluation Methods of Peak Wind Force Coefficients for Designing Cladding/Components of Domed Free Roofs

Abstract

The present paper investigates the simplified evaluation methods of positive and negative peak wind force coefficients, Ĉ_f and Č_f, for designing the cladding/components of domed free roofs based on a wind tunnel experiment, in which peak factor method and quasi-steady approach are employed. Focus is on the distribution of wind force coefficients along the centerline parallel to the wind direction. Empirical formulas are provided for the distributions of the mean wind force coefficient , RMS fluctuating wind force coefficient and peak factors, and , for evaluating Ĉ_f and Č_f, as a function of the rise/span ratio f/D of the roof and the turbulence intensities, I_uH and I_wH, in the along-wind and vertical directions of approach flow at the mean roof height H. The formulas are validated by the experimental results.