PARAMETER ESTIMATION OF STRUCTURES FROM STATIC STRAIN MEASUREMENTS. I: FORMULATION

The authors present a method for structural parameter identification using elemental strain measurements. Subsets of applied static forces and measured strains are used to identify element stiffness parameters of all or a portion of a finite element model of the structure. The method maintains structural connectivity and assesses changes in cross-sectional properties at the element level, including large changes or element failures for stable structures. Strain measurements do not require a frame of reference, making them superior to static displacement measurements. In addition, strain measurements are more accurate than ordinary displacement measurements and are appropriate for bridges, buildings, and other structures. Damage assessment and load rating of structures are two applications of the identified cross-sectional element properties. Two numerical examples, a two-dimensional truss and a frame structure, are provided that successfully and accurately evaluate the element stiffnesses.

Language

  • English

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Filing Info

  • Accession Number: 00723370
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 29 1996 12:00AM