A dynamic load test is described that is performed by hitting the footing with a sledgehammer instrumented with a force transducer and recording the footing-soil response with two geophones placed on the footing. The force-time signal from the hammer (input) and the velocity-time signal obtained from the geophones (response) are recorded. An analysis of the force and velocity signals using the fast Fourier transform gives a good estimate of the stiffness of the footing-soil assembly. This nondestructive testing method fits within the series of nondestructive methods for foundation control. The method was used to predict the stiffness of a model scale footing resting on a bed of dry sand.

Media Info

  • Features: Appendices; Figures; References;
  • Pagination: p. 415-431
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00495166
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 30 1990 12:00AM