Frequency domain observations of small motions at concrete/steel interfaces

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Description

When two rough interfaces in contact are driven in harmonic motion, the frictional resistance to shear causes the response of the driven system to be nonlinear. Displacement along the interface cannot be described by a linear predictor, one analogous to Hooke`s law for elastic response. Laboratory experiments are described here to illustrate that the resulting motion is not random, but produces measurable and characteristic output at harmonics of the driving frequency. Although the geometry of the tests is not practical for evaluating the integrity of steel/concrete interfaces in structures, the results illustrate that the principle should apply to other geometries ... continued below

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10 p.

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Bonner, B.P. June 1, 1996.

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Description

When two rough interfaces in contact are driven in harmonic motion, the frictional resistance to shear causes the response of the driven system to be nonlinear. Displacement along the interface cannot be described by a linear predictor, one analogous to Hooke`s law for elastic response. Laboratory experiments are described here to illustrate that the resulting motion is not random, but produces measurable and characteristic output at harmonics of the driving frequency. Although the geometry of the tests is not practical for evaluating the integrity of steel/concrete interfaces in structures, the results illustrate that the principle should apply to other geometries where shearing forces can be applied to interfaces to determine the quality of bonding.

Physical Description

10 p.

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OSTI as DE96013820

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  • Other Information: PBD: Jun 1996

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  • Other: DE96013820
  • Report No.: UCRL-ID--124224
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/274200 | External Link
  • Office of Scientific & Technical Information Report Number: 274200
  • Archival Resource Key: ark:/67531/metadc669121

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  • June 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 23, 2016, 4:16 p.m.

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Bonner, B.P. Frequency domain observations of small motions at concrete/steel interfaces, report, June 1, 1996; California. (digital.library.unt.edu/ark:/67531/metadc669121/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.