Research On Newmerical Simulation Of Wind-load On High-rise Building

Wind damage is the major one of natural disasters. Wind-resistant design andhow to improve the wind-resistant ability of structures have become the hottest issuesin both theory and engineering. China is a typhoon-prone country, and a great numberof high-rise buildings which have complex shape and original structure continue tospring up with the rapid development of economic construction in Ch ina. Therefore, itis necessary to further the wind-resistant study on high-rise buildings, which will laya solid foundation for the wind-resistant design of high-rise buildings in China.With the perfect and development of Computational Fluid Dynamics (C FD)theory and Computational Wind Engineering, CFD has become an effective methodfor wind-resistant design, and it has unique advantages compared with the traditionalmethod. Due to the CFD method is short designed cycle, low cost and small risk, itwill have vast development prospects in wind-resistant study and it will be applied onpractical engineering gradually.In this thesis, the basic principle of CFD including basic equations and thenumerical simulation method are fully presented. Meanwhile, Reynolds AverageNumerical Simulation is adopted to do a detail study on mean wind pressuredistributions on high-rise building based on FLUENT fluid dynamics numericalsimulation platform. Furthermore, numerical results are fit well with measured resultswhich confirmed the validity of the numerical simulation method．Moreover, the time histories of the wind pressure on high-rise building areobtained in unsteady numerical simulation by using LES method, the time history offluctuated wind speed is generated by the method of quasi-symmetric boundaryconditions. Fluctuated wind pressure coefficients and peak wind pressure coefficientsare obtained through the time statistic of the wind pressure data. The numericalresults meet a good agreement with the corresponding measured data, which provesthe validity of the methods of the generation of fluctuated wind speed time history,the wind load calculation and the data processing．In this thesis, the numerical simulation technology is adopted to predict thesurface wind load characteristics of high-rise building, and the steady numericalresults fit well with the measured results, the unsteady numerical results have reasonable changing trend with the measured results but the value is different.It is hoped that, the numerical simulation results of wind loads on high-risebuildings will provide a valuable reference for wind-resistant study and design ofengineering structures.