The Wind-load Analysis And Numerical Simulation Study On The Surface Of Large-span Structure

Owing to elegance of the shape and the ability of providing with space without inner columns as large as possible, large-span structure is widely used in buildings such as gymnasiums, exhibition centers and airport buildings, and so on. This kind of structure made up of light-material is usually sensitive to wind-load due to their light self-weight, large flexibility, small damp, low self-vibration frequency and complex geometric shape properties, and wind-load often becomes the governing load of it. How to accurately predict the global and local wind pressures on the large-span structure is most of important in the whole structural design process.Start off the practice of engineering, based on a great deal of the data and literatures, we first establish basic theory including the governing equations for the numerical prediction. Then through analyzing the result of wind tune test of Shenzhen Shiming Center model, we discuss the characteristics of wind pressures on its surface; in the last chapter we model with a large span flat roof as a large-span building, and make discussions about wind pressure on the model surface between the results of computational numerical simulation which based on time-average equation and by means of standard k -ε and RSM turbulence model and the test data in atmospheric boundary layer wind tune along different wind directions and test conditions. According the analysis, we theoretically conclude and summarize the rule of the wind pressures on the surface of the large-span structure. The results in this paper can be the reference of the codification of design about wind loads and the construction of buildings against typhoon.