Smart Structures and Systems

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Non-contact surface wave testing of pavements: comparing a rolling microphone array with accelerometer measurements

  • Bjurstrom, Henrik (Department of Highway and Railway Engineering, KTH Royal Institute of Technology) ;
  • Ryden, Nils (Department of Highway and Railway Engineering, KTH Royal Institute of Technology) ;
  • Birgisson, Bjorn (Department of Highway and Railway Engineering, KTH Royal Institute of Technology)
  • Received : 2014.02.09
  • Accepted : 2014.09.06
  • Published : 2016.01.25
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Abstract

Rayleigh wave velocity along a straight survey line on a concrete plate is measured in order to compare different non-destructive data acquisition techniques. Results from a rolling non-contact data acquisition system using air-coupled microphones are compared to conventional stationary accelerometer results. The results show a good match between the two acquisition techniques. Rolling measurements were found to provide a fast and reliable alternative to stationary system for stiffness determination. However, the non-contact approach is shown to be sensitive to unevenness of the measured surface. Measures to overcome this disadvantage are discussed and demonstrated using both forward and reverse rolling measurements.

Keywords

References

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