Numerical Simulation Of Wind Loads On The Spatial Structure Of Multi-fold Surface Shape

Spatial structure of the multi-fold surface shape is one of the large-span spatial structures which are the fastest growing form of the structure in recent decades. Because of its light and beautiful architectural style and vast space without interior columns, they used widely in sports stadiums, airport station, convention centers and other large public buildings. However, this form of structure is particularly sensitive to the effects of wind loads, the wind loads has become a difficulty of structure design and a research focus in computational wind engineering. Because of the large span spatial structure shape are more and more complicated, rare similar shape is in the current load code for the design of building structure, and the lack of adequate normative guidance to wind-resistant design of structures. At present, the theoretical solution to this complex flow problem is quite difficult, field measurement instruments and wind tunnel simulations can get more accurate test results, but it takes a lot of time, manpower and financial resources, as well as its applicability is not strong, not widely used in the actual project. Therefore, the search for new solutions has become a need for structural wind study. With the continuous development of turbulence model in computational fluid dynamics and the rapid development of computer technology, numerical simulation of wind tunnel tests with the technology has matured, so using this method to research the wind loads on the spatial structure of multi-fold surface shape, which has great practical significance for wind-resistant design of the structure.In this paper, using calculation software CFX14.0as a computing platform, wind loads on the spatial structure of multi-fold surface shape were calculated and analyzed, the main research contents are as follows:1. The numerical simulation of TTU architecture prototype testing which is a calculation model for simple cube structure. That based on different turbulence model and different wind directions. Then the calculation results are compared, wind pressure distribution on the structure surface and flow characteristics of flow field around the structure are got. To verify the correctness and reliability of the numerical simulation technology of wind load around the building.2. With the stadium in Xining Haihu new area for the calculation example of the spatial structure of multi-fold surface shape, this article establishes full-scale geometry, choosing different turbulence model and wind directions as various simulate conditions. Then calculating the wind loads around the structure. Finally, the analysis of the simulation results is get as follows:(1) Choosing the SSTk-ω model and BSL-RSM model as turbulence model, and analyzing the effects of turbulent model in different wind directions,(2) wind pressure distribution on the structure surface and flow characteristics of flow field around the structure are analyzed in the role of different wind directions to the flow.(3) Analyzing the simulation data, and calculating the average wind pressure coefficients on the roof surface, then the most unfavorable average partition coefficient of wind pressure is given, so the reference is provided for this kind of engineering structure to the wind-resistant design.Through the above research and analysis, the reference is provided for research and design of wind resistance on the spatial structure of multi-fold surface shape, and some summary and outlook of CFD numerical simulation are made in wind loads research.