Earthquakes and Structures

  • 제11권6호
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  • Pages.1077-1099
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  • 2016
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Lyapunov-based Semi-active Control of Adaptive Base Isolation System employing Magnetorheological Elastomer base isolators

  • Chen, Xi (School of Electrical Engineering and Automation, Tianjin University) ;
  • Li, Jianchun (School of Civil and Environmental Engineering, University of Technology Sydney) ;
  • Li, Yancheng (School of Civil and Environmental Engineering, University of Technology Sydney) ;
  • Gu, Xiaoyu (School of Civil and Environmental Engineering, University of Technology Sydney)
  • 투고 : 2016.03.16
  • 심사 : 2016.07.06
  • 발행 : 2016.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

One of the main shortcomings in the current passive base isolation system is lack of adaptability. The recent research and development of a novel adaptive seismic isolator based on magnetorheological elastomer (MRE) material has created an opportunity to add adaptability to base isolation systems for civil structures. The new MRE based base isolator is able to significantly alter its shear modulus or lateral stiffness with the applied magnetic field or electric current, which makes it a competitive candidate to develop an adaptive base isolation system. This paper aims at exploring suitable control algorithms for such adaptive base isolation system by developing a close-loop semi-active control system for a building structure equipped with MRE base isolators. The MRE base isolator is simulated by a numerical model derived from experimental characterization based on the Bouc-Wen Model, which is able to describe the force-displacement response of the device accurately. The parameters of Bouc-Wen Model such as the stiffness and the damping coefficients are described as functions of the applied current. The state-space model is built by analyzing the dynamic property of the structure embedded with MRE base isolators. A Lyapunov-based controller is designed to adaptively vary the current applied to MRE base isolator to suppress the quake-induced vibrations. The proposed control method is applied to a widely used benchmark base-isolated structure by numerical simulation. The performance of the adaptive base isolation system was evaluated through comparison with optimal passive base isolation system and a passive base isolation system with optimized base shear. It is concluded that the adaptive base isolation system with proposed Lyapunov-based semi-active control surpasses the performance of other two passive systems in protecting the civil structures under seismic events.

키워드

과제정보

연구 과제 주관 기관 : Australian Research Council

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피인용 문헌

  1. A dual-loop adaptive control for minimizing time response delay in real-time structural vibration control with magnetorheological (MR) devices vol.27, pp.1, 2018, https://doi.org/10.1088/1361-665X/aa98be
  2. Modeling the behaviors of magnetorheological elastomer isolator in shear-compression mixed mode utilizing artificial neural network optimized by fuzzy algorithm (ANNOFA) vol.27, pp.11, 2018, https://doi.org/10.1088/1361-665X/aadfa9
  3. The effect of composite-elastomer isolation system on the seismic response of liquid-storage tanks: Part I vol.15, pp.5, 2018, https://doi.org/10.12989/eas.2018.15.5.513
  4. Hysteresis characterization and identification of the normalized Bouc-Wen model vol.70, pp.2, 2016, https://doi.org/10.12989/sem.2019.70.2.209
  5. Semi-Active Control for Benchmark Building Using Innovative TMD with MRE Isolators vol.20, pp.6, 2020, https://doi.org/10.1142/s021945542040009x
  6. Comparison of classical and reliable controller performances for seismic response mitigation vol.20, pp.3, 2016, https://doi.org/10.12989/eas.2021.20.3.353