Frontiers of Mechanical Engineering >

2017 , Vol. 12 >Issue 2: 224 - 233

DOI: https://doi.org/10.1007/s11465-017-0413-6

RESEARCH ARTICLE

Seismic response reduction of a three-story building by an MR grease damper

  • Tomoki SAKURAI 1 ,
  • Shin MORISHITA , 2
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  • 1. Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama 240-8501, Japan
  • 2. Environment and Information Sciences, Yokohama National University, Yokohama 240-8501, Japan

Received date: 01 Jul 2016

Accepted date: 30 Oct 2016

Published date: 19 Jun 2017

Copyright

2017 Higher Education Press and Springer-Verlag Berlin Heidelberg
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Abstract

This paper describes an application of magneto-rheological (MR) grease dampers as seismic dampers for a three-story steel structure. MR fluid is widely known as a smart material with rheological properties that can be varied by magnetic field strength. This material has been applied to various types of devices, such as dampers, clutches, and engine mounts. However, the ferromagnetic particles dispersed in MR fluid settle out of the suspension after a certain interval because of the density difference between the particles and their carrier fluid. To overcome this defect, we developed a new type of controllable working fluid using grease as the carrier of magnetic particles. MR grease was introduced into a cylindrical damper, and the seismic performance of the damper was subsequently studied via numerical analysis. The analysis results of the MR grease damper were compared with those of other seismic dampers. We confirmed that the MR grease damper is an effective seismic damper.

Key words： MR grease damper; seismic damper; vibration control; structural response; FEM analysis

Cite this article

Tomoki SAKURAI , Shin MORISHITA . Seismic response reduction of a three-story building by an MR grease damper[J]. Frontiers of Mechanical Engineering, 2017 , 12(2) : 224 -233 . DOI: 10.1007/s11465-017-0413-6

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