论文部分内容阅读
通过对附加轨道型非线性能量阱的5层钢框架进行振动台试验,考察了该装置对建筑结构振动控制的效果。试验结果表明:使用相对于主体结构总体质量比很小(2%)的轨道型非线性能量阱可以减小主体结构在地震作用下的顶层位移、位移均方根和加速度响应;试验中非线性能量阱安装于试验框架的顶层,顶层位移与绝对加速度的响应与框架固有频率和地震波频谱特征有关,从而使其振动控制效果受地震波的频谱特征影响较为明显;在框架动力响应的频域分析中,非线性能量阱表现出宽频控制的特点。试验中非线性能量阱的小车滑轮分别采用钢轮与橡胶轮,对比分析表明,不同非线性能量阱本身的阻尼对振动控制效果有着较大的影响。
Through the shaking table test of 5-story steel frame with additional orbital nonlinear energy trap, the effect of this device on the vibration control of building structure was investigated. The experimental results show that the top-level displacement, displacement root mean square and acceleration response of the main structure under earthquake action can be reduced by using a nonlinear orbit nonlinear energy trap with a small overall mass ratio (2%) to the main structure. In the experiment, the nonlinear The energy trap is installed on the top of the test frame. The response of top displacement and absolute acceleration is related to the natural frequency of the frame and the spectrum characteristics of the seismic wave, so that the vibration control effect is more obviously affected by the spectral characteristics of the seismic wave. In the frequency domain analysis of the dynamic response of the frame , The nonlinear energy trap shows the characteristics of broadband control. In the experiment, the trolley with non-linear energy trap uses steel wheels and rubber wheels respectively. The comparative analysis shows that the damping of different nonlinear energy traps has a great influence on the vibration control effect.