围护墙多功能减震结构振动台试验研究

为研究围护墙多功能减震结构的减震特性和减震效果,按1∶3缩比制作围护墙钢框架减震结构模型和非减震结构模型,并进行模拟地震振动台试验,研究不同工况下的模型结构动力特性及随着输入不同加速度峰值的El Centro地震波激励下的加速度反应和位移反应。结果表明:结构的自振频率和振型控制与调谐质量阻尼器的个数有关,减震结构对于控制结构的加速度和位移响应非常有效,顶层的减震幅度最大,并在地震波为4 m/s2时,减震效果最佳。通过减震指标动力放大系数和减震率共同评价减震结构对加速度反应和位移反应的控制,说明减震结构对位移的控制效果更优。

SHAKING TABLE TEST OF THE ENCLOSURE WALL MULTIFUNCTIONAL VIBRATION ABSORPTION STRUCTURE

To research the vibration absorption characteristics and effect of the enclosure wall multifunctional vibration absorption structure,the models include steel frame vibration absorption structure and non-vibration absorption structure were made in 1∶ 3 scale,and simulated earthquake shake table test was done. It was studied the dynamic characteristic under different working conditions,as well as acceleration response and displacement response under different seismic excitation El-Centro earthquake waves of the model structure. The results show that numbers of the TMD are related to the nature frequency and control of vibration mode,the vibration absorption structure is very effective for control the acceleration and displacement response,the biggest amplitude of the vibration absorption lies in the top story,and the best effect is got when seismic wave is 4 m /s2. The model's acceleration and displacement reaction of the vibration absorption are evaluated through shock index dynamic magnification coefficient and the rate of vibration reduction,thus showing that vibration absorption structure can get better control effect for the displacement response.