Abstract: Numerical Simulation of Wind Field and WindResistant Shape Abstract： Based on the computational fluid dynamics (CFD) method, the wind flow characteristics and wind pressure distribution of the builtonstilts type discshapelike spatial structure were numerically simulated at different incoming wind directions by using the Fluent software. The influence of the height of the supporting column, the heightspan ratio of the top and the bottom structural surfaces on wind pressure distribution and windloading shape coefficients was analyzed. The results show that the height of the supporting column should be chosen carefully to allow wind pass easily and to reduce wind load force. With the increase of heightspan ratio of the top and the bottom structural surfaces, the positive wind pressure on windward, the vortex effect on the leeward and the overall wind loading force increase significantly. It is found out that a lower curvature surface will significantly improve the structural windresistant characteristics. Finally, some conclusions on windresistant structural shape optimization were reached, which could provide some references for the design of this kind of structures.

Key words: discshapelike spatial structures, windload shape coefficients, structural shape, windresistant shape optimization