Abstract In this study, the torsional aeroelastic effects are investigated for high-rise buildings by carrying out a series of forced vibration wind tunnel tests. In these tests nine building models with different side ratios and structural eccentricities are considered, where the structural responses and surface pressures for each model are measured. The method used to determine the torsional aerodynamic stiffness and damping ratios from the experimental data is introduced. The effects of the vibration amplitude, side ratio, and structural eccentricities on these two ratios are examined. The results show that the amplitude of the vibration does not have a significant effect on the torsional aeroelastic effect. Also, the torsional aerodynamic stiffness ratio can be neglected in the absence of structural eccentricity. However, the side ratio has a significant effect on the aerodynamic damping ratio where it decreases with increasing side ratio. Although the cross-wind eccentricities are found to have no significant influence on the aeroelastic effects, the along-wind eccentricities greatly influence the aeroelastic effects. Furthermore, a windward eccentricity can increase both the aerodynamic stiffness and damping ratios, whereas a leeward eccentricity can decrease these ratios.

中文翻译：

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使用强迫振动风洞试验研究高层建筑的扭转气动弹性效应

摘要 本研究通过一系列受迫振动风洞试验研究了高层建筑的扭转气动弹性效应。在这些测试中，考虑了九个具有不同边比和结构偏心率的建筑模型，其中测量了每个模型的结构响应和表面压力。介绍了根据实验数据确定扭转气动刚度和阻尼比的方法。检查了振动幅度、侧比和结构偏心率对这两个比率的影响。结果表明，振动幅度对扭转气动弹性效应没有显着影响。此外，在没有结构偏心的情况下，扭转空气动力学刚度比可以忽略不计。然而，边比对气动阻尼比有显着影响，随着边比的增加，它会降低。虽然发现侧风偏心率对气动弹性效应没有显着影响，但顺风偏心率对气动弹性效应影响很大。此外，迎风偏心可以增加空气动力学刚度和阻尼比，而背风偏心可以降低这些比例。