철근콘크리트 실험체의 시스템 식별과 유한요소 모델 수정Finite Element Model Updating and System Identification of Reinforced Concrete Specimen
- Other Titles
- Finite Element Model Updating and System Identification of Reinforced Concrete Specimen
- Authors
- 김학진; 유은종; 김호근; 장극관; 조승호; 정란; 이상현
- Issue Date
- Jul-2008
- Publisher
- 한국소음진동공학회
- Keywords
- Finite Element Model Updating; Transfer Functions; Natural Frequency; Mode Shape; Shaking Table Test; 유한요소 모델 수정; 전달함수; 고유진동수; 모드형상; 진동대 실험
- Citation
- 한국소음진동공학회논문집, v.18, no.7, pp.725 - 731
- Indexed
- KCI
- Journal Title
- 한국소음진동공학회논문집
- Volume
- 18
- Number
- 7
- Start Page
- 725
- End Page
- 731
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/178121
- ISSN
- 1598-2785
- Abstract
- This paper focused on the application of finite element model updating technique to evaluate the structural properties of the reinforced concrete specimen using the data collected from shaking table tests. The specimen was subjected to six El Centro(NS, 1942) ground motion histories with different peak ground acceleration(PGA) ranging from 0.06g to 0.50g. For model updating, flexural stiffness values of structural members(walls and slabs) were chosen as the updating parameters so that the converged results have direct physical interpretations. Initial values for finite element model were determined from the member dimensions and material properties. Frequency response functions(i.e. transfer functions), natural frequencies and mode shapes were obtained using the acceleration measurement at each floor and given ground acceleration history. The weighting factors were used to account for the relative confidence in different types of inputs for updating(i.e. transfer function and natural frequencies). The constraints based on upper/lower bound of parameters and sensitivity-based constraints were implemented to the updating procedure in this study using standard bounded variable least-squares(BVLS) method. The veracity of the updated finite element model was investigated by comparing the predicted and measured responses. The results indicated that the updated model replicates the dynamic behavior of the specimens reasonably well. At each stage of shaking, severity of damage that results from cracking of the reinforced concrete member was quantified from the updated parameters(i.e. flexural stiffness values).
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