Investigation on Blocking Effect of High-Rise Building in Wind Tunnel Experiment

Investigation on blocking effect of single building with rectangular cross-section was carried out extensively and achieved initial success.However,it is rarely reported about the investigation on the blocking effect of group of buildings in tunnel experiment.Therefore,pressure measurement was carried out for a practical rigid model with many surrounding buildings based on two different scale ratios.It was found that the pressure data of two models are significantly different due to the blocking effect.Analysis results show that,for wind tunnel model experiment with more surrounding buildings,blocking effect may results in serious data distortion.The blocking effect on side air pressure is more serious than that on windward side and leeward side air pressure.Existing correction method of blocking effect does not have general applicability.Moreover,the blocking ratio,as a global index,cannot describe the blocking effect at different positions on a mode.