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在足尺五层钢框架结构每层的斜向支撑上附加了一种粘弹性耗能减震阻尼装置,采用自由振动和基底正弦稳态激振试验的方法,研究了结构动力特性和动力反应的变化。试验表明,在25°C环境温度下与没有附加阻尼装置的框架相比,结构的阻尼比可由原来的1.30%增加到10.6%,结构加速度反应可以减少70%以上。足尺试验的结果还与该结构2/5模型的振动台,试验结果进行了比较。
A viscoelastic energy dissipation damping device is attached to the oblique support of each layer of a full-five five-story steel frame structure. The free vibration and the sinusoidal steady-state vibration excitation test are used to study the dynamic characteristics and dynamic response of the structure. The change. Experiments show that compared with the frame without additional damping device, the damping ratio of the structure can be increased from the original 1.30% to 10.6% at 25°C ambient temperature, and the structural acceleration response can be reduced by more than 70%. The full-scale test results are also compared with the vibration table and test results of the 2/5 model of this structure.