Shetty, Kiran Kumar and Nayak, Gopinath and Holla, B R K and Dhanalakshmi, . (2013) The effect of tuning frequency ratio of the dampers on the effectiveness of the MTMD in suppressing the response of base isolated plane frame structure. In: National conference on new horizons in civil engineering – NHCE 2013, April 12-13, 2013, M I T Manipal.

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Abstract

The paper presents dynamic analysis of a base isolated multi-storey plane frame structure having three degrees of freedom (two translations along x, y -axes and one rotation about zaxis)at each node, with passive dampers attached at the building base. Multiple tuned mass dampers (MTMD) with uniformly distributed frequencies are considered for this purpose. The effectiveness of MTMD in suppressing the structural response is determined by comparing the response of corresponding structure without MTMD. It is found that MTMD can be used effectively to suppress the displacement and forces of the base isolated plane frame structure. The effect of tuning frequency ratio of the dampers on the effectiveness of MTMD is also studied. It is also observed that the optimum value of tuning frequency ratio occurs in the vicinity of unity.

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