Aerodynamic Research of Wind and Snow Loads on the Cylinder Tank Roofs

Abstract

The widespread use of vertical cylindrical tanks makes the question of their sustainable design. Snow load brings the greatest contribution to the stress-strain state of the supporting structures of spherical dome covering vertical tanks. Developed a new geometrical forms of shapes covering of the tank with volume 20 000 m3. There is no recommendations of wind and snow loads on developed forms in Russian and international codes. The experimental investigations of wind and snow loads acting on tanks dome roofs were performed in boundary layer wind tunnel. Aerodynamic coefficients of an external pressure and a velocity of a wind near the roof were defined. Spreading and a value of snow loads also were defined. The results of investigations shows that snow masses on the roofs of suggested forms placed more symmetrical then on the typical spherical dome coverings of the vertical tanks. With allowance for experimental results numerical analysis of dome roofs was performed. Comparative analysis showed that the roofs of suggested forms are more effective than typical spherical and conical dome roofs of vertical cylindrical tanks.