Semi‐active direct control method for seismic alleviation of structures using MR dampers
Semi‐active direct control method for seismic alleviation of structures using MR dampers
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DOI：
10.1002/stc.1515
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发表时间：
2013-06
影响因子：
5.4
通讯作者：
N. Mohajer Rahbari;B. Farahmand Azar;S. Talatahari;H. Safari
中科院分区：
文献类型：
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作者：
N. Mohajer Rahbari;B. Farahmand Azar;S. Talatahari;H. Safari
本文采用直接半主动控制方法对安装了磁流变(MR)阻尼器的结构进行了减震研究。利用Bouc-wen模型研究了磁流变阻尼器的非线性行为，并根据该模型的特点提出了一种有效的控制器。在该方法中，为了使磁流变阻尼器的控制力在任何时刻都接近估计的最优控制力，通过使用线性二次型调节器最优控制算法来计算在磁流变阻尼器中产生磁场的最优电流电压的大小。将该算法应用于安装了磁流变阻尼器控制系统的三层和11层剪力墙结构的地震振动控制，并对控制器的性能进行了评估。版权所有©2012 John Wiley&Sons，Ltd.
In the present study, a direct semi‐active control method is introduced to mitigate the seismic responses of structures equipped with magnetorheological (MR) dampers. Bouc–Wen model is utilized to investigate the nonlinear behavior of the MR dampers, and an efficient controller is proposed based on this model features. In this method, for conducting the MR damper control force close to the estimated optimal control force at any moment, the optimal magnitude of current voltage that is applied to produce a magnetic field in the MR damper is calculated through the use of linear quadratic regulator optimal control algorithm. This algorithm is applied to control seismic vibrations of a three‐story and an 11‐story sample shear building that have been equipped with the MR damper control system, and the performance of the controller is evaluated. Copyright © 2012 John Wiley & Sons, Ltd.