| Summary: | 碩士 === 淡江大學 === 水資源及環境工程學系 === 88 === The high-rise building plays a major role in construction development of modern cities. The eccentricity of the structural system cannot be neglected in modern designs.Thus the effects of wind on high-rise buildings and the interactions between these two have become main research topics.
In order to control the influence of wind , this research simplified the high-rise building into a 2-D rectangular section. In order to observe the aeroelastic responses of these rectangular cylinders, we applied the method of free vibration in the wind tunnel, used different depth-to-height ratios, changed the frequency ratios of vibration and torsion,used different damping ratios, and applied the control factor to obtain different eccentricities of the cylinders in the along-wind direction.
The experimental results show that when the geometric center is located above the mass center, the fluctuating displacement decreases in the across-wind direction, and vice versa. Increases in the eccentricity enhance the relative changes, when the frequency ratio is close to1.0, the fluctuating displacement also increases, the damping ratio restrains the response, thus a high damping ratio reduces the fluctuating displacement.
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