Earthquakes and Structures

  • 제5권3호
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  • Pages.359-378
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  • 2013
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Dynamic state estimation for identifying earthquake support motions in instrumented structures

  • Radhika, B. (Department of Civil Engineering, Indian Institute of Science) ;
  • Manohar, C.S. (Department of Civil Engineering, Indian Institute of Science)
  • 투고 : 2013.02.12
  • 심사 : 2013.05.10
  • 발행 : 2013.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

The problem of identification of multi-component and (or) spatially varying earthquake support motions based on measured responses in instrumented structures is considered. The governing equations of motion are cast in the state space form and a time domain solution to the input identification problem is developed based on the Kalman and particle filtering methods. The method allows for noise in measured responses, imperfections in mathematical model for the structure, and possible nonlinear behavior of the structure. The unknown support motions are treated as hypothetical additional system states and a prior model for these motions are taken to be given in terms of white noise processes. For linear systems, the solution is developed within the Kalman filtering framework while, for nonlinear systems, the Monte Carlo simulation based particle filtering tools are employed. In the latter case, the question of controlling sampling variance based on the idea of Rao-Blackwellization is also explored. Illustrative examples include identification of multi-component and spatially varying support motions in linear/nonlinear structures.

키워드

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