Tests for wind load of tall buildings with openings

Wind pressure measurements of tall buildings with openings were carried out in a boundary layer wind tunnel. Based on the test results, the influence of openings on wind loads of tall buildings was investigated. The results indicateed that openings can reduce the base wind loads on buildings; the reduction of along-wind mean base shear for opening on upper part is very close to that for opening on lower part; but opening on upper part is more favorable for decreasing the along-wind mean base moment and the across-wind RMS base moment; empirical formulas for calculating the relative values of the along-wind mean base moment coefficient and the across-wind RMS base moment coefficient are obtained with the fitting method; the distributions of wind force at each floor of tall buildings with openings are quite different to those without opening, this should receive special attention in wind-resist design of tall buildings with openings.