Determination of wind pressure coefficients on cylindrical roofs (Barrel roofs)

Cylindrical (Barrel) roofs are a type of space structure that are used to cover large openings. In these structures, due to low dead load, wind load has a greater effect on this type of structure. In calculating wind force, one of the coefficients related to the geometry of the structure is the Cp coefficient, which is provided for a number of common structures in the codes. If these coefficients are not present in the codes, the method can be Wind tunnel testing should be used by constructing a structural model and placing it in the wind tunnel and obtaining the wind pressure coefficients. Another solution is to model the wind tunnel using software. Computational fluid dynamics (CFD) method can be used to calculate the load effect. In recent decades, this method has become a powerful tool for wind flow modeling as the computing power of hardware increases. In this research, numerical modeling of wind flow on the surface of a cylindrical structure (Barrel) has been done and the determination of wind pressure coefficients has been done with the used of Ansys software. Wind pressure coefficients for Barrel roof with three height to span ratios of 0.1, 0.3 and 0.5 are presented. Also, the equation these wind pressure coefficients is obtained.