VERTICAL AND TORSIONAL VIBRATION OF FOUNDATIONS IN INHOMOGENEOUS MEDIA

The dynamic impedances for radially inhomogeneous, infinite viscoelastic layers with a circular hole, and for piles embedded in a medium represented by such layers are studied. An examination is made of systems in vertical and torsional modes of vibration, considering both a discontinuous variation in shear modulus and an exponentially increasing, continuous variation. The results are evaluated over wide ranges of the parameters involved and compared with those obtained for a homogeneous layer. Also, the harmonic response of strip foundations supported at the surface of a vertically inhomogeneous viscoelastic half-space is examined, and it is shown that within the framework of a previously proposed approximation, the impedances of such foundations for both horizontal and vertical modes of vibration may be deduced from those obtained for the verticaly excited, radially inhomogeneous layer.

• Availability:
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• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Veletsos, A S
  • Dotson, K W
• Publication Date: 1988-9

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 1002-21
• Serial:
  • Journal of Geotechnical Engineering
  • Volume: 114
  • Issue Number: 9
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9410

Subject/Index Terms

• TRT Terms: Electrical impedance; Heterogeneity; Mechanical impedance; Samples; Shear modulus; Strip foundations; Support piles; Torsion; Vibration; Viscoelasticity
• Old TRIS Terms: Torsional vibration
• Subject Areas: Bridges and other structures; Design; Highways; I25: Design of Tunnels;

Filing Info

• Accession Number: 00476182
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 30 1988 12:00AM