Seismic Response of Controlled Structures with Active Multiple Tuned Mass Dampers

Active multiple tuned mass dampers (AMTMDs), consisting of several active tuned mass dampers (ATMDs) with identical stiffness and damping coefficients but varying mass and control force, have recently been proposed to suppress undesirable oscillations of structures under ground acceleration. It has been shown that AMTMDs can remarkably improve the performance of multiple tuned mass dampers (MTMDs) and are also more effective in reducing structural oscillation than single ATMDs. However, good performance of AMTMDs (including a single ATMD illustrated from frequency-domain analysis) may not necessarily translate into good seismic reduction behavior in the time-domain. To investigate these phenomena, a 3-story steel structure model controlled by AMTMD with 3 ATMDs was implemented in SIMULINK and subjected to several historical earthquakes. The structure under consideration was assumed to have uncertainty of stiffness (±15% of its initial stiffness) in the numerical simulations. Optimum design parameters of the AMTMDs were obtained in the frequency-domain by implementing minimization of the minimum values of the maximum dynamic magnification factors of general structures with AMTMD. For comparison purposes, response analysis of the same structure with a single ATMD was also performed. The numerical analysis and comparison show the AMTMDs generally render better effectiveness when compared with a single ATMD for structures subjected to historical earthquakes. In particular, AMTMD can improve effectiveness of a single ATMD for a structure with uncertainty of stiffness of ±15% of its initial stiffness.

  • Availability:
  • Authors:
    • Bingkang, Han
    • Chunxiang, Li
  • Publication Date: 2006-12

Language

  • English

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Filing Info

  • Accession Number: 01046636
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 9 2007 2:25PM