Computational Structural Engineering (전산구조공학)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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Damage Prediction Accuracy as a Function of Model Uncertainty in Structures

모델의 불확실성이 구조물의 손상예측정확도에 미치는 영향

  • Published : 1994.09.01
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Abstract

A methodology to assess damage prediction accuracy as a function of model uncertainty in structures is presented. In the first part, a theory of approach is outlined. First, a damage detection algorithm to locate and size damage in structures using few modal responses of the structures is summarized. Next, methods to quantify model uncertainty and the damage detection accuracy are formulated. In the second part, a methodology to assess the effect of model uncertainty on the damage detection accuracy of real structures is designed. In the last part, the feasibility of the assessment methodology is demonstrated by using a plate-girder bridge for which only information on a single mode is available.

구조물의 손상예측정확도를 모델불확실성의 함수로 산정하는 방법론이 제시되었다. 먼저, 구조물의 손상발생위치과 크기를 결정할 수 있는 알고리즘의 요약되고 모델불확실성과 손상발견정확도를 측정하는 방법들이 제시되었다. 다음으로, 실존구조물의 손상발견정확도에 미치는 모델불확실성의 영향을 산정하는 방법론이 제시되었다. 마지막으로, 한개의 진동모드가 측정된 Plate-Girder교량을 사용하여 이같은 산정방법론의 적합성이 예증되었다.

Keywords

References

  1. J. Strain Analysis v.14 no.2 The Location of Defects in Structures from Measurements of Natural Frequencies Cawley,P.;Adams,R.D.
  2. Mechanics of Non-destructive Testing Stiffness Change As A Nondestructive Damage Measurement O'Brien,T.K.;W.W.Stinchcomb(ed.)
  3. J. Mech. Phys. Solids v.30 no.5 Eigenfrequency Changes of Structures Due to Cracks, Notches or Other Geometrical Changes Gudmunson,P.
  4. NATO Workshop on Bridge Evaluation, Repair and Rehabilitation Modal Technology for Damage Detection of Bridges Biswas,M.;Pandey,A.K.;Samman,M.;A.Nowak(ed.)
  5. Int. J. Anal. Exp. Modal Analysis v.5 no.2 Global Non-Destructive Damage Evaluation in Solids Stubbs,N.;Osegueda,R.
  6. Computational Stochastic Mechanics Updating of a Model and Its Uncertainties Utilizing Dynamic Test Data Beck,J.L.;Katafygiotis,L.S.;P.D.Spanos(ed.);C.A.Brebbia(ed.)
  7. ASCE Tenth Structures Congress '92 An Efficient and Robust Algorithm for Damage Localization in Offshore Platforms Stubbs,N.;Kim,J.T.;Topole,K.
  8. Computational Stochastic Mechanics The Effect of Model Uncertainty on the Accuracy of Global Nondestructive Damage Detection in Structures Stubbs,N.;Kim,J.T.;Topole,K.;P.D.Spanos(ed.);C.A.Brebbia(ed.)
  9. Neural Networks and Fuzzy Systems Kosko,B.
  10. J. of Structural Engineering, ASCE v.116 no.9 Experimental Study of Bridge Monitoring Technique Mazurek,D.F.;DeWolf,J.T.
  11. Neural Networks for Signal Processing Kosko,B.
  12. ABAQUS User Manual