Wind Load And Interference Effect Research On Tall Buildings With Aerodynamic Modification In Body Shape

With the development of structure design and construction, the number of the super tall building increased gradually on the world. Over 200 super tall buildings higher than 250 metres have been constructed from uncompletely statics. With the increasement of the height, the sensibility of the wind load is more and more remarkable. While with the aerodynamic measures applied to super tall building, wind load can be effectively decrease, which would save the cost of the construction and satisfy the requirement of the design. Meanwhile, with the super tall building closely locating in the CBD of a city, interference effect can not be ignored of each other. Therefore it is necessary to study the interference effect between the high-rise building with aerodynamic measurements. In this paper, CFD and finite element numerical simulation are used to study the interference effect of the high-rise building with aerodynamic measures. This article main content is as follows:First, analys wind load of the single high-rise building with aerodynamic measures.In this article the high-rise building with aerodynamic measures are mainly refer to the building with the corner modification and twist building by changing their shape parameters. Then the two direction wind load is obtained by large eddy simulation and the wind load variation with the shape size is compared to evaluate the effectiveness of the aerodynamic measures.Second, analys the interference betweent the high-rise building of square configuration and the square configuration with corner modification.In this article the round corner modification is selected as aerodynamic modification. For two buildings, serial and parallel arrangement with different space are analysed. Then the wind load of single building are compared to aquire the interference factor. On the other hand, interference factor can be applied in engineering design and further research.Finally, wind vibration analysis of structure was made according to the wind load above acquired.In this paper, the time history analysis considered the influence of aerodynamic damping. Based on the fluid-structure interaction numerical simulation, according wind velocity above, the corresponding aerodynamic damping would be determined. In ANSYS to establish the corresponding finite element model for wind vibration time history analysis, comparing the aerodynamic damping effects on structural response.According to the interference effect of wind load time history, evaluate the interference effects.