A New Method for Determining Location and Number of MR Dampers in Semi-Active Structural Control
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Abstract
This study presents a new method for determining suitable locations and number of MagnetoRheological dampers in semi active procedures. Here, the first mode of structural oscillation is used and some specific criteria are introduced to classify the structural types. Based on this classification, the structural stories are divided into three categories: very weak, weak, and strong. The best place to install a MR damper is very weak stories. The efficiency of dampers will increase if MR dampers attached to the very weak stories so that the relative displacement of top of structure reduces considerably. Moreover, the number of MR dampers is assumed to be equal to the number of very weak stories as the dampers act by high performance. This method easily provides the necessary information for the structural control designer to use these devices logically and efficiently. By applying this approach, designers can easily determine number and location MR dampers. Moreover, the proposed method could determine number of fully activated dampers; however, MR dampers may not be completely activated in common techniques. Based on the proposed approach, vibrations of four models are controlled by MR dampers and results are compared with conventional techniques. Results show that the suggested method has suitable efficiency and consistency with other well-known studies.
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