Characterizing the modal response of a composite soil nail under axial excitation

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Conference16th International Conference on Soil Mechanics and Geotechnical Engineering: 12 September 2005, Osaka, Japan
Pages14; # of pages: 4
Subjectsoil nails, impulse response, axial excitation, phase velocities
AbstractThis paper characterizes the waves induced in a grouted soil nail from axial excitations in an attempt to develop a non-destructive field procedure for determining the length of in-situ soil nails. The study comprised experimental tests in which a 3.66-m long grouted laboratory soil nail was built and tested and numerical analyses in which a finite element model (FEM) of the nail was devel-oped and calibrated. The FEM clarified the experimental responses of the nail by providing wave velocities and mode shapes for natural frequencies below 5 kHz, which described the actual dynamic behaviour of the soil nail. The results showed that axial excita-tions of the composite soil nail induced modes, which displayed both shear and longitudinal behaviour. Wave velocities below 3000m/s suggested shear wave modes of energy transport whereas the nearly uniform axial displacements within the cross sections of the nail were more in keeping with longitudinal modes of behaviour.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number47644
NPARC number20378251
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Record identifier96420979-7b31-4266-9cb2-5aa7ee4ffd07
Record created2012-07-24
Record modified2016-05-09
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