Techno Press

Structural Engineering and Mechanics   Volume 17, Number 3, March 2004, pages 493-526
State-of-the-art of semiactive control systems using MR fluid dampers in civil engineering applications
H.-J. Jung, B. F. Spencer, Jr., Y. Q. Ni and I.-W. Lee

Abstract     [Full Text]
    Semiactive control systems have received considerable attention for protecting structures against natural hazards such as strong earthquakes and high winds, because they not only offer the reliability of passive control systems but also maintain the versatility and adaptability of fully active control systems. Among the many semiactive control devices, magnetorheological (MR) fluid dampers comprise one particularly promising class. In the field of civil engineering, much research and development on MR fluid damper-based control systems has been conducted since this unique semiactive device was first introduced to civil engineering applications in mid 1990s. In 2001, MR fluid dampers were applied to the full-scale in-service civil engineering structures for the first time. This state-of-the-art paper includes a detailed literature review of dynamic models of MR fluid dampers for describing their complex dynamic behavior and control algorithms considering the characteristics of MR fluid dampers. This extensive review provides references to semiactive control systems using MR fluid dampers. The MR fluid damper-based semiactive control systems are shown to have the potential for mitigating the responses of full-scale civil engineering structures under natural hazards.
Key Words
    semiactive control; MR fluid damper; dynamic models; control algorithms; full-scale applications.
H.-J. Jung; Department of Civil and Environmental Engineering, Sejong University, Seoul 143-747, Korea
B. F. Spencer, Jr.; Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
Y. Q. Ni; Department of Civil and Structural Engineering, Hong Kong Polytechnic University, Hong Hum, Kowloon, Hong Kong
I.-W. Lee; Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea

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