Journal of the Architectural Institute of Korea (대한건축학회논문집)

Architectural Institute of Korea (대한건축학회)
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Estimation of Physical Parameters from Frequency Response Function Data

주파수응답함수 데이터로부터 부재의 물성치 추정

  • Hong, Yu-Sik (Dept, of Architectural Engineering, Kangwon National University) ;
  • Eun, Hee-Chang (Department of Architectural Engineering, Kangwon National University) ;
  • Song, Jun-Hyuk (Dept, of Architectural Engineering, Kangwon National University) ;
  • An, Jae-Hyoung (Dept, of Architectural Engineering, Kangwon National University)
  • Received : 2022.02.03
  • Accepted : 2022.05.10
  • Published : 2022.05.30
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Abstract

The structure is deteriorated by various factors such as environmental effect and unexpected overloading. The structural performance in service is evaluated by various non-destructive tests and structural analysis. This study proposes an empirical method to predict physical parameters of structural member in the frequency domain. The method utilizes the frequency response function (FRF) data measured and collected by an impact hammer test assuming the fundamental vibration mode of the member. The validity of the proposed method is illustrated in two analytical examples and two experimental works. It is found that the physical parameters of beam member should be modified by correction factor predicted by the boundary conditions and wavelength of the fundamental mode. And it is observed that the parameters can be optimally predicted in taking the FRF data prior to the frequency that is directly outside the first resonance frequency. The results demonstrate that the physical parameters can be estimated very closely by the proposed method.

Keywords

Acknowledgement

이 성과는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임 (NRF-2020R1F1A1069328).

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