Smart Structures and Systems

  • 제18권6호
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  • Pages.1251-1267
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  • 2016
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Application of simple adaptive control to an MR damper-based control system for seismically excited nonlinear buildings

  • Javanbakht, Majd (Department of Civil Engineering, Iran University of Science and Technology) ;
  • Amini, Fereidoun (Department of Civil Engineering, Iran University of Science and Technology)
  • 투고 : 2014.06.23
  • 심사 : 2016.04.20
  • 발행 : 2016.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper, Simple Adaptive Control (SAC) is used to enhance the seismic response of nonlinear tall buildings based on acceleration feedback. Semi-active MR dampers are employed as control actuator due to their reliability and well-known dynamic models. Acceleration feedback is used because of availability, cost-efficiency and reliable measurements of acceleration sensors. However, using acceleration feedback in the control loop causes the structure not to apparently meet some requirements of the SAC algorithm. In addition to defining an appropriate SAC reference model and using inherently stable MR dampers, a modification in the original structure of the SAC is proposed in order to improve its adaptability to the situation in which the plant does not satisfy the algorithm's stability requirements. To investigate the performance of the developed control system, a numerical study is conducted on the benchmark 20-story nonlinear building and the responses of the SAC-controlled structure are compared to an $H_2/LQG$ clipped-optimal controller under the effect of different seismic excitations. As indicated by the results, SAC controller effectively reduces the story drifts and hence the seismically-induced damage throughout the structural members despite its simplicity, independence of structural parameters and while using fewer number of dampers in contrast with the $H_2/LQG$ clipped-optimal controller.

키워드

참고문헌

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