Research On Wind-induced Interference Effects Of Long-span Membrane Structures Considering Fluid-structure Interaction

Large span membrane structure is a typical wind sensitive structure,wind load is the control load.the wind resistant design for large span membrane structure theory is not perfect,the fluid-structure coupling effect of wind and membrane structure became the wind-resistant design of membrane structure theory development bottleneck,is urgently needed to solve in the design of membrane structure wind resistance of important and difficult problem.In the high-speed urbanization today,Large span membrane structure are not independent existence,the surrounding existing buildings or new buildings will affect the wind field distribution around the large span membrane structure,wind-induced interference effect and the change of produce,the wind field around the membrane structure.But at present,the research on wind-induced interference effects of such flexible structures like membrane structures is very limited,and the effects of fluid structure interaction are seldom considered.Therefore,this paper consider the wind-induced interference effect of flow of large span membrane structure and solid-coupling of the wind pressure distribution characteristics reveal large span membrane structure under wind load in the surrounding buildings under the disturbance and the fluid structure interaction mechanism,It is hoped that useful reference can be drawn for the wind resistant design and engineering practice of this kind of flexible building.In this paper,based on the computational fluid mechanics principle,wind load is studied by using numerical simulation means long-span membrane structure of wind-induced Interference Effects,the specific research contents include:1.The hemispherical large span membrane structure is widely used in Engineering,Using different turbulence models to fully consider the impact of turbulence,were studied with fluid-solid coupling when applying interference with no interference building,and a interference buildings,the average wind pressure distribution characteristics of the surface structure of the roof.First of all,when there are no interference buildings around the large span membrane structure,the wind pressure distribution on the roof of long-span membrane structures is studied at different wind speeds.Then,a rectangular interference structure is placed upstream of the roof of a large span membrane structure.The wind pressure distribution on the roof of a largespan membrane structure with different distances and different wind directions is studied in the two buildings.The wind pressure coefficients of each measuring point are statistically analyzed,and the wind pressure coefficients of each measuring point are drawn.Finally,the obtained data are compared with the data of the building without interference,and the influence of wind-induced interference on the wind pressure distribution of the long-span membrane structure roof is summarized.2.The paper research on the hemispherical large span membrane structure considered fluid-structure coupling with different disturb buildings when the structure on the surface of the average wind pressure distribution characteristics.The paper consider the application of different spacing and different spacing interference buildings,The characteristics of wind pressure distribution on the surface of the membrane structure under different wind speeds and wind directions are studied by using different turbulence models.Select along the flow direction of wind,comparing the different distribution of measuring points to get the average wind pressure coefficient curve,and curve rule of wind pressure coefficient were analyzed,summarized the hemispherical large span membrane structure of the average wind pressure distribution.Compared with the building condition which no interference buildings.The influence of wind interference effect on the distribution of wind pressure coefficient on the surface of long span membrane structure is summarized.