rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Assessment of relative impact of model uncertainty on the accuracy of nondestructive damage detection in structures
  name:
    name part: Kim, Jeong-Tae
    name part: 1962-
    role:
      role term: creator
  name:
    name part: Bray, Don
    role:
      role term: degree committee member.
  name:
    name part: Stubbs, Norris
    role:
      role term: degree supervisor.
  name:
    name part: Tielking, John T.
    role:
      role term: degree committee member.
  name:
    name part: Yao, James T. P.
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses.
  origin info:
    place:
      place term: xx
    date issued: 1993
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xv, 183 leaves : illustrations ; 28 cm
  abstract: This dissertation deals with the general problem of nondestructively detecting, locating, and sizing damage in structures via changes in modal responses of the structures. The objective of this study is to assess the relative impact of model uncertainty on the accuracy of nondestructive damage detection (NDD) in structures. In order to achieve this goal, four major tasks are performed: (1) NDD methods to locate and size damage in structures are selected; (2) model uncertainty and NDD accuracy in structures are quantified; (3) a methodology to assess the relative impact of model uncertainty on the NDD accuracy in structures is developed; and (4) the relative impact of model uncertainty on the NDD accuracy in real structures is assessed. In this study, the following four major results are obtained. Firstly, a NDD scheme is selected to locate and size damage in structures with high complexity, with few modes measured, and without baseline modal information. Secondly, model uncertainty measures and NDD accuracy measures are selected. Thirdly, a methodology is developed to estimate the relative impact of model uncertainty on the NDD accuracy in real structures. Finally, the methodology is applied to two real structures and relationships between model uncertainty and NDD accuracy in those structures are produced as follows: (1) for a model plate-girder bridge it is shown that uncertainty in the selection of damage detection model and uncertainty in mode shapes due to errors in modal amplitudes have relatively higher impacts on NDD accuracy than uncertainty in stiffness parameters, uncertainty in the number of modes, and uncertainty in frequencies; and (2) for a complicated three-dimensional truss-type bridge it is shown that all three selected uncertainty types which are uncertainty in the selection of damage detection model, uncertainty in baseline mode shapes, and uncertainty due to missing sensor readings have significant influences on NDD accuracy.
  note: "Major subject: Civil Engineering."
  note: Vita.
  note: Ph. D. Texas A & M University 1993
  note: Includes bibliographical references.
  subject:
    topic: Major civil engineering
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-1513692
  identifier: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-1513692
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  record info:
    record content source: TXA
    record creation date: 960119
    record change date: 20220103134919.0
    record identifier: in00001267876
    language of cataloging:
      language term: eng