Smart Structures and Systems

  • 제26권3호
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  • Pages.373-390
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  • 2020
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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Performance validation and application of a mixed force-displacement loading strategy for bi-directional hybrid simulation

  • Wang, Zhen (School of Civil Engineering and Architecture, Wuhan University of Technology) ;
  • Tan, Qiyang (School of Civil Engineering, Harbin Institute of Technology) ;
  • Shi, Pengfei (China Construction Science & Technology Corporation Limited) ;
  • Yang, Ge (School of Civil Engineering and Architecture, Wuhan University of Technology) ;
  • Zhu, Siyu (School of Civil Engineering, Harbin Institute of Technology) ;
  • Xu, Guoshan (School of Civil Engineering, Harbin Institute of Technology) ;
  • Wu, Bin (School of Civil Engineering and Architecture, Wuhan University of Technology) ;
  • Sun, Jianyun (China State Construction Engineering Corporation Limited, Technical Center)
  • 투고 : 2020.02.03
  • 심사 : 2020.06.08
  • 발행 : 2020.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

Hybrid simulation (HS) is a versatile tool for structural performance evaluation under dynamic loads. Although real structural responses are often multiple-directional owing to an eccentric mass/stiffness of the structure and/or excitations not along structural major axes, few HS in this field takes into account structural responses in multiple directions. Multi-directional loading is more challenging than uni-directional loading as there is a nonlinear transformation between actuator and specimen coordinate systems, increasing the difficulty of suppressing loading error. Moreover, redundant actuators may exist in multi-directional hybrid simulations of large-scale structures, which requires the loading strategy to contain ineffective loading of multiple actuators. To address these issues, lately a new strategy was conceived for accurate reproduction of desired displacements in bi-directional hybrid simulations (BHS), which is characterized in two features, i.e., iterative displacement command updating based on the Jacobian matrix considering nonlinear geometric relationships, and force-based control for compensating ineffective forces of redundant actuators. This paper performs performance validation and application of this new mixed loading strategy. In particular, virtual BHS considering linear and nonlinear specimen models, and the diversity of actuator properties were carried out. A validation test was implemented with a steel frame specimen. A real application of this strategy to BHS on a full-scale 2-story frame specimen was performed. Studies showed that this strategy exhibited excellent tracking performance for the measured displacements of the control point and remarkable compensation for ineffective forces of the redundant actuator. This strategy was demonstrated to be capable of accurately and effectively reproducing the desired displacements in large-scale BHS.

키워드

과제정보

The authors gratefully acknowledge the financial support from the National Key Research and Development Program of China (Grant Nos. 2017YFC0703605 and 2016YFC0701106) and the National Natural Science Foundation of China (Grant Nos. 51878525 and 51778190).

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