科研之友
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摘要
Wind induced interference effects between high-rise buildings have become quite important in structural engineering in modern cities recently due to the close proximity of high-rise buildings. In this study, the wind induced interference effects on the torsional load on two adjacent high-rise buildings are studied through wind tunnel experiment. Two different sectional shapes of high-rise buildings are studied and four kinds of arrangements are investigated. Existing interference factors are adopted to quantitatively evaluate the interference effects. Results show that the mean torsion on a building when under interfered conditions can be tripled that for the isolated case. Although the interference effect on the fluctuating torsion is not as strong as on the mean torsion, the interference factor can be as large as 1.6. The extreme torsion under interference effects is also higher at 1.8 times that of the isolated case. With the help of pressure measurement on the principal building and the flow field information around the buildings, the underlying mechanisms of some typical cases which exhibit strong interference effects are discussed. Results show that the intricate flow field around the principal building with the presence of an interfering building is the main case of the large torsion it experiences.
