基于加速度反馈的结构地震反应半主动MR阻尼控制试验

本文针对安装有半主动磁流变阻尼器（MR damper)的一座二层模型结构进行了抗震振动台试验研究，通过采用基于加速度反馈控制策略的两种半主动控制算法进行了在各种地震动作用下模型结构的半主动控制的抗震试验研究，并进行了Passive-on和Passive-off两种被动控制的试验研究。试验结果表明，MR阻尼器作为一种半主动控制装置可以有效地控制结构的峰值位移和均方差反应，且半主动控制对结构顶层的峰值位移和均方差的控制效果均优于两种被动控制方法。因此，本文提出的两种半主动控制算法都是有效的，并宜于实现。

Tests of seismic response control for structure with semi - active MR dampers based on acceleration feedback

In this paper, the shaking table tests for a two storey model structure with a semi active MR damper are carried out. First of all, semi active control tests for the model structure are conducted by using two modified semi active control algorithms based on acceleration feedback strategy under a series of earthquake excitations, and then the two passive control tests of passive on and passive off are also made under the same earthquake excitations. Finally, the comparisons of semi active and passive control test results are made. The test results show that the MR damper as a semi active device can effectively reduce the peak and RMS responses and the semi active controls for reducing the peak and RMS responses, especially for the top floor, are much better than two passive systems. So the two control algorithms presented is effective and can be easily realized.