Computational Fluid Dynamics Simulation Study Of Wind Effect And Equivalent Static Wind Loads Calculation Of High-rise Buildings

With the development of economy, the advancement of science and technologyand the rapid increase of population in cities, the super-high-rise buildings developrapidly. As a result of utility of new high-strength and light-weight constructionmaterials and advanced construction technology, super-high-rise buildings tend to belighter, more flexible, and with a lower damping ratio.Therefore, they becomesensitive to the wind load, and the wind load is usually the main control load to thestructural design.At present, theoretical analysis, field measurement, wind runnel test andnumerical simulation technology are the four major research methods of windengineering research. Computational Fluid Dynamics(CFD) is a new subjectdeveloped in recent years. With the improvement of computer technology, numericalsimulation has received more attention of many scholars for its application in civilengineering. The research work of the first part of this paper is numerical simulationof wind load on high-rise building surface. Firstly the basic theory of thecomputational fluid dynamics have been introduced, including the establishment ofequations, the classification of the turbulence models and the methods of near-walltreatment. Then an actual project is taken as background, and a detailed discussion ofseveral factors which affect the precision of simulation is made, such as boundarycondition, computation field, turbulence model, grid arrangement and so on. Areasonable model of the building has been established, and numerical simulation ofwind load on high-rise building surface has been studied. Later, average wind pressurecoefficients are compared with the results of wind tunnel tests，and reasonableexplanations are made for the error providing some reference for wind–resistantdesign of high-rise building structures.Equivalent static wind load of high-rise building is a hot issue in windengineering. At present, there are several calculation methods about ESWL ofhigh-rise building, mainly containing the gust loading factor（GLF）method, inertiawind load（IWL）method, load response correlation and so on. The research work ofthe last part of this article mainly makes a detailed and systematical summary andcomparison about the three methods above. Advantages and disadvantages, and theirapplication conditions are point out. Later, take an actual project for example, threemethods above have been used to calculate the equivalent static wind load of high-risebuildings, and then comparison and analysis of results are made, and some valuableconclusions are obtained. These can provide some valuable suggestions forengineering designer when they select the corresponding methods for calculatingequivalent static wind loads of high-rise buildings.