Structural Engineering and Mechanics

  • 제54권2호
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  • Pages.291-304
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  • 2015
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Detection and parametric identification of structural nonlinear restoring forces from partial measurements of structural responses

  • Lei, Ying (Department of Civil Engineering, Xiamen University) ;
  • Hua, Wei (Department of Civil Engineering, Xiamen University) ;
  • Luo, Sujuan (Department of Civil Engineering, Xiamen University) ;
  • He, Mingyu (Department of Civil Engineering, Xiamen University)
  • 투고 : 2014.11.30
  • 심사 : 2015.03.16
  • 발행 : 2015.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

Compared with the identification of linear structures, it is more challenging to conduct identification of nonlinear structure systems, especially when the locations of structural nonlinearities are not clear in structural systems. Moreover, it is highly desirable to develop methods of parametric identification using partial measurements of structural responses for practical application. To cope with these issues, an identification method is proposed in this paper for the detection and parametric identification of structural nonlinear restoring forces using only partial measurements of structural responses. First, an equivalent linear structural system is proposed for a nonlinear structure and the locations of structural nonlinearities are detected. Then, the parameters of structural nonlinear restoring forces at the locations of identified structural nonlinearities together with the linear part structural parameters are identified by the extended Kalman filter. The proposed method simplifies the identification of nonlinear structures. Numerical examples of the identification of two nonlinear multi-story shear frames and a planar nonlinear truss with different nonlinear models and locations are used to validate the proposed method.

키워드

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피인용 문헌

  1. Synthesis of Cross-Correlation Functions of Partial Responses and the Extended Kalman Filter Approach for Structural Damage Detection Under Ambient Excitations 2017, https://doi.org/10.1142/S0219455418400035
  2. Model-Free Identification of Nonlinear Restoring Force with Modified Observation Equation vol.9, pp.2, 2019, https://doi.org/10.3390/app9020306
  3. Chaotic particle swarm optimization in optimal active control of shear buildings vol.61, pp.3, 2017, https://doi.org/10.12989/sem.2017.61.3.347
  4. On-line integration of structural identification/damage detection and structural reliability evaluation of stochastic building structures vol.63, pp.6, 2017, https://doi.org/10.12989/sem.2017.63.6.789