Structural Engineering and Mechanics

  • 제32권6호
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  • Pages.755-770
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  • 2009
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

A feasibility study on smart base isolation systems using magneto-rheological elastomers

  • Koo, Jeong-Hoi (Department of Mechanical and Manufacturing Engineering, Miami University) ;
  • Jang, Dong-Doo (Department of Civil and Environmental Engineering, KAIST) ;
  • Usman, Muhammad (Department of Civil and Environmental Engineering, KAIST) ;
  • Jung, Hyung-Jo (Department of Civil and Environmental Engineering, KAIST)
  • 투고 : 2009.01.22
  • 심사 : 2009.06.25
  • 발행 : 2009.08.20
⟨ 이전 논문 다음 논문 ⟩

초록

This study proposes a new smart base isolation system that employs Magneto-Rheological Elastomers (MREs), a class of smart materials whose elastic modulus or stiffness can be varied depending on the magnitude of an applied magnetic field. It also evaluates the dynamic performance of the MRE-based isolation system in reducing vibrations in structures subject to various seismic excitations. As controllable stiffness elements, MREs can increase the dynamic control bandwidth of the isolation system, improving its vibration reduction capability. To study the effectiveness of the MRE-based isolation system, this paper compares its dynamic performance in reducing vibration responses of a base-isolated single-story structure (i.e., 2DOF) with that of a conventional base-isolation system. Moreover, two control algorithms (linear quadratic regulator (LQR)-based control and state-switched control) are considered for regulating the stiffness of MREs. The simulation results show that the MRE-based isolation system outperformed the conventional system in suppressing the maximum base drift, acceleration, and displacement of the structure.

키워드

참고문헌

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