IMPACT-ECHO RESPONSE OF CONCRETE SHAFTS

Numerical and experimental studies of the transient response of concrete shafts subjected to elastic impact were carried out using the finite element method and the impact-echo testing technique. Two- and three-dimensional finite element studies of concrete shafts were performed for: (a) solid shafts; (b) shafts containing cracks, voids, layers of low-quality concrete, and changes in cross section, such as bulges and necks; and (c) shafts in soil. These studies were carried out to gain an improved understanding of the impact response of concrete shafts containing flaws, problems for which there are currently no analytical solutions. Laboratory studies of solid concrete shafts were carried out to verify the finite element models. Also, experimental studies were carried out on concrete shafts embedded in soil. Results show that additional information about the integrity of drilled shafts and piles can be obtained using impact techniques. The numerical studies also show that the finite element method is a powerful tool for studying the impact response of concrete foundation elements.

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  • Corporate Authors:

    American Society for Testing and Materials (ASTM)

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • Lin, Y
    • Sansalone, M
    • Carino, N J
  • Publication Date: 1991-6

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Filing Info

  • Accession Number: 00610060
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 30 1991 12:00AM