Abstract
Magnetorheological (MR) fluids with exceptional rheological properties are skilled in exhibiting quick performance to control vibrations during earthquakes. The significant damping properties of MR fluids were effectively controlled with the help of externally applied magnetic field and current. Currently, MR fluids with nano Fe3O4 iron particles are used in the preparation of MR fluid to reduce sedimentation. Fabrication of MR damper consists of nylon material to reduce the weight and resist high-temperature distortion. The weight of the proposed MR damper was about 445 g with the magnetic core. The MR fluid of proportions 30% (MRF30), 45% (MRF 45) and 60% (MRF 60) of iron particle is prepared, and the cyclic load test frequency is 0.5 Hz and amplitude, ± 5 mm. The maximum damping force was found to be 1.032 kN obtained from the MR fluid containing 60% Fe3O4 particles in magnatec oil. For variable frequency, the time history loading test was done with El Centro ground acceleration data where the maximum damping force for MRF 60 is 1.3 kN.
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Acknowledgements
The authors thank Karunya Institute of Technology and Sciences, Coimbatore, Tamilnadu, India, for their constant support. We also extend our acknowledgement to the Department of Science and Technology (Grant No: DST/TSG/STS/2015/30-G).
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Daniel, C., Hemalatha, G., Sarala, L., Tensing, D., Manoharan, S.S. (2021). Smart Lightweight MR Damper for the Enhancement of Seismic Mitigation. In: Adhikari, S., Dutta, A., Choudhury, S. (eds) Advances in Structural Technologies. Lecture Notes in Civil Engineering, vol 81. Springer, Singapore. https://doi.org/10.1007/978-981-15-5235-9_7
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DOI: https://doi.org/10.1007/978-981-15-5235-9_7
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