Numerical Simulation Of Wind-induced Interference Effect On Groups Of Low-rise Buildings

Predicting the wind-induced load of a group of low-rise buildings in complex interference situation via numerical simulation is an advanced approach to more efficient structural design.The two cases about interference effect simulated and discussed in this study are:Firstly,a case including 3 tandem buildings was simulated.What matches simulation is the test about the exactly same buildings in same configuration carried out in BJTU wind tunnel.In the test 6 indicators(C_pm,C_prmse and Force coefficient on both isolated and interfered buildings)were exported and compared with those from wind tunnel tests.Some expressions and conclusions were obtained.During that,first-hand experimental data was also processed into 6 indicators for comparison,and a scheme for presenting a turbulent inlet boundary condition close enough to the experimental inlet was proposed.Secondly,a case of buildings at East Wright ST,Pensacola,Florida,USA where Hurricane Ivan?2004?hit was simulated.And what matches with that are files out of surveys from DNDA?Development of Data Non-uniformity Detection and Alleviation?proposed by HUD?U.S.Department of Housing and Urban Development?.3 indicators(C_pm,Lift and Damage Category)were exported and compared with those from the investigatory files.Some expressions and conclusions were obtained.During that,the full-scale 3d model files of buildings at Pensacola were obtained via the cooperation of a series of CAE software and open source databases.In the first case the interference coefficients on each building were observed in order to explain the flow pattern around three buildings.And in the second case the load on buildings due to other upstream buildings was discussed.