CFD Simulation Of Wind Loads On High-rise Building With Rough Wall

It’s necessary to consider the wind load of towering structures.Many studies has been conducted to research the wind load of the building with regular shape.But sometimes the shape is not regular because of the decorative strip or the architectural image of which lacks intensive study.In order to meet the needs of the function and aesthetic of the buildings’surface being made in complex shapes such as concave and convex,it is necessary to analyze and study the wind load of high-rise buildings with rough wall.The research contents of the thesis consist of several aspects as follows:(1)Based on the basic theory of numerical simulation of wind engineering,a standard model,called CAARC model,for numerical simulation of high-rise buildings is introduced.Besides,based on the research of scholars,the basic parameters of numerical simulation are discussed.The grid independence is also verified.(2)The two-dimensional numerical simulation is carried out.The influence of the parameters such as the aspect ratio and the height and spacing of the wall on the aerodynamic force,wind pressure distribution and flow field are compared.(3)Selecting a concrete building for three-dimensional numerical simulation,and comparing it with the wind tunnel test results.The wind load characteristics of towering buildings with rough wall are discussed.(4)The conclusion shows that when the wind direction is perpendicular to the windward side,the wind will converged because of the concave on the wall.As a result,the wind pressure coefficient increases.Rough wall will lead to small vortexes on both sides,which will conduct the pressure coefficient decrease.While on the leeward side,the vortex generated by the rough wall is larger and the reflux velocity is less than that of the smooth wall,so the absolute value of the wind pressure coefficient is reduced.