Computation of structural flexibility for bridge health monitoring using ambient modal data

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Issues surrounding the use of ambient vibration modes for the location of structural damage via dynamically measured flexibility are examined. Several methods for obtaining the required mass- normalized dynamic mode shapes from ambient modal data are implemented and compared. The method are applied to data from a series of ambient modal tests on an actual highway bridge. Results indicate that for the damage case examined, the flexibility from the ambient mode shapes gave a better indication of damage than the flexibility from the forced-vibration mode shapes. This improved performance is attributed to the higher excitation load levels that occur during ... continued below

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5 p.

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Doebling, S.W. & Farrar, C.R. May 1, 1996.

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Description

Issues surrounding the use of ambient vibration modes for the location of structural damage via dynamically measured flexibility are examined. Several methods for obtaining the required mass- normalized dynamic mode shapes from ambient modal data are implemented and compared. The method are applied to data from a series of ambient modal tests on an actual highway bridge. Results indicate that for the damage case examined, the flexibility from the ambient mode shapes gave a better indication of damage than the flexibility from the forced-vibration mode shapes. This improved performance is attributed to the higher excitation load levels that occur during the ambient test.

Physical Description

5 p.

Notes

OSTI as DE96008149

Source

  • 11. American Society of Civil Engineers (ASCE) engineering mechanics conference, Ft. Lauderdale, FL (United States), 19-22 May 1996

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  • Other: DE96008149
  • Report No.: LA-UR--96-0305
  • Report No.: CONF-9605100--4
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 238358
  • Archival Resource Key: ark:/67531/metadc672910

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Office of Scientific & Technical Information Technical Reports

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  • May 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 25, 2016, 2:10 p.m.

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Doebling, S.W. & Farrar, C.R. Computation of structural flexibility for bridge health monitoring using ambient modal data, article, May 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc672910/: accessed July 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.