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摘要
A series of pressure measurement wind tunnel experiments were conducted? and the wind-induced acceleration responses at the top of principal building in different reduced velocities were calculated. The interference effects on across-wind peak acceleration responses between two tall buildings were investigated in different breadth ratios Br (Br = Bi / Bp ?where Bi and Bp are the breadth of the interfering and principal building respectively) and height ratios Hr (Hr = Hi / Hp ? where Hi and Hp are the height of the interfering and principal building respectively) . Furthermore? enveloped interference factors (EIF ) and peak accelerations in along-wind and across-wind directions were compared and analyzed. It is shown that the across-wind peak accelerations for the cases of Br equals to 0. 4 and 0. 6 are remarkably larger than those for other breadth ratios because of wake-vortex-induced resonance? and the maximum values of EIF corresponding to the cases of Br equals to 0. 4 and 0. 6 are 3. 1 and 2. 1? respectively. Amplification effects are dominant for across-wind peak acceleration in different height ratios and the maximum EIF is about 1. 4? whereas certain shielding effects occur in oblique arrangements. When tandem spacing ratio x / b = 10? the across-wind peak acceleration is still increased by 10% -30% for different breadth ratios and height ratios. Although the values of EIF for along-wind acceleration are larger than those for across-wind acceleration when Br equals to 0. 8? 1. 0?1. 2 and 1. 4 and Hr equals to 1. 0?1. 2 and 1. 4? the peak acceleration responses in across-wind direction are consistently larger than those in along-wind direction for all the breath ratios and height ratios? i. e.? across wind acceleration is dominant. ? 2023 Science Press.
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