CFD Numerical Simulation Of High-rise Buildings In Tianjin Shuangjie Town Banwan Mansion Project

With the continuous development of social economy,more and more people are concentrated in the city,resulting in the shortage of urban land,so there are more and more high-rise buildings.With the continuous increase of building height,the impact of wind load on high-rise buildings is also growing.Therefore,it is of great significance to study the influence of wind load on building structure.With the development of computational fluid dynamics,it has become a trend to predict the wind load on buildings by numerical simulation of the real wind environment.Based on the CFD numerical simulation technology,this paper takes the high-rise building project of Banwan building in Shuangjie town of Tianjin as the research object,and carries out the CFD numerical simulation of single high-rise building and multiple high-rise buildings under different conditions,so as to explore the distribution law of the wind pressure and the wind pressure coefficient on the building surface.It mainly includes the following aspects:The research status and achievements of wind engineering and wind load of buildings at home and abroad are summarized.The control equations of hydrodynamics,the selection of turbulence model and the numerical calculation method are introduced.Through the CFD numerical simulation of the wind pressure distribution characteristics of a super high-rise building,the results of the numerical simulation are compared with the wind tunnel test to verify the correctness of the numerical simulation method used in this paper.By using the same CFD numerical simulation technology,the wind pressure distribution characteristics of the building surface in different wind directions are analyzed.The results show that with the increasing of the building height,the positive wind pressure of the building surface increases gradually,the maximum value appears in the upper part of the building,the minimum value appears in the bottom area of the building,and the maximum negative wind pressure of the building surface has characteristics of increasing first and then decreasing.When there is an interfering building,the wind pressure distribution on the windward side is not very regular due to the influence of the wake of the interfering building.The flow field on the upper part of the main building is less disturbed by the surrounding buildings,which usually shows that the positive pressure on the middle and lower parts is smaller,and the average wind pressure distribution on the upper part is more regular,while the surrounding buildings have little influence on the distribution of the wind pressure on the leeward side.The leeward side mainly shows the wind suction and the numerical fluctuation of wind pressure coefficient is not very large.Through the analysis of wind field flow characteristics in different wind directions,it is found that the existence of interfering buildings has obvious influence on the distribution of local loads of buildings,which is mainly manifested in the shielding effect in some wind directions and the increase of local wind pressure.