Damage Detection in Shear Building Based on Genetic Algorithm Using Flexibility Matrix

유연도 행렬을 이용한 전단빌딩의 유전자 알고리즘 기반 손상추정

  • 나채국 (한국과학기술원 건설 및 환경공학과) ;
  • 김선필 (현대건설 기술개발원) ;
  • 곽효경 (한국과학기술원 건설 및 환경공학과)
  • Published : 2008.02.28


Stiffness estimation of a shear building due to local damages is usually achieved though structural analysis based on the assumed material properties and idealized numerical modeling of structure. Conventional numerical modeling, however, frequently causes an inevitable error in the structural response and this makes it difficult to exactly predict the damage state in structure. To solve this problem, this paper introduces a damage detection technique for shear building using genetic algorithm. The introduced algorithm evaluates the damage in structure using a flexibility matrix since the flexibility matrix can exactly be obtained from the field test in spite of using a few lower dynamic modes of structure. The introduced algorithm is expected to be more effectively used in damage detection of structures rather than conventional method using the stiffness matrix. Moreover, even in cases when an accurate measurement of structural stiffness cannot be expected, the proposed technique makes it possible to estimate the absolute change in stiffness of the structure on the basis of genetic algorithm. The validity of the proposed technique is demonstrated though numerical analysis using OPENSEES.


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