Net pressure and correlation characteristics between internal and external pressures for tall building with opening

摘要

Net pressure and correlation characteristics between internal and external pressures for a typical high-rise building with a dominant opening are detailed investigated by a series of wind tunnel experiments on a scaled rigid model. The experimental results show that internal pressures are absolutely spatially relevant. When the dominant opening faces to approaching wind, there exists strong positive correlation between internal and external pressures of each tap on the windward wall, whereas negative correlation can be observed for each tap on the other walls. At the wind directions of 15 degrees and 75 degrees, the highest negative correlation coefficient occurs on the right side wall and is up to -0.6 and the mean values of area-averaged net pressure coefficient on the right side wall also reach their maximum and minimum values, respectively; meanwhile, the values of standard deviation of area-averaged net pressure coefficient are also much higher. Thus, it should be paid more attention to the wind-resistant design of side wall envelopes because they are easier to be destroyed.