MODEL-UNCERTAINTY IMPACT AND DAMAGE-DETECTION ACCURACY IN PLATE GIRDER

The authors assess the impact of model uncertainty on the damage-prediction accuracy of a nondestructive damage-detection technique when applied to a model plate girder. First, a damage-detection algorithm to locate and size damage from few mode shapes of structures is outlined. Then, locations and magnitudes of damage in the model plate girder are estimated by employing the damage-detection algorithm. Finally, damage-prediction accuracy for the model plate girder is estimated as a function of model uncertainties that are most likely or exist in the damage-detection procedure of the model plate girder. By applying the approach to the model plate girder, damage can be located confidently with a relatively small localization error and a relatively small false-negative error, but a relatively large false-positive error. The authors note that severity of damage can be predicted with a relatively large error.

Language

  • English

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Filing Info

  • Accession Number: 00711637
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 30 1995 12:00AM