Frequency domain observations of small motions at concrete/steel interfaces

Technical Report · Sat Jun 01 04:00:00 EDT 1996

DOI:https://doi.org/10.2172/274200· OSTI ID:274200

Bonner, B P

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.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 274200
• Report Number(s): UCRL-ID--124224; ON: DE96013820
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BONDING
CONCRETES
INTERFACES
MATERIALS TESTING
MECHANICAL STRUCTURES
MECHANICAL VIBRATIONS
NONDESTRUCTIVE TESTING
OSCILLATORS
SHEAR
STEELS
TORSION