FORMULAS AND CHARTS FOR IMPEDANCES OF SURFACE AND EMBEDDED FOUNDATIONS

A complete set of simple formulas and graphs is presented covering the following: nearly all foundation base shapes (excluding annular); surface and partially and fully embedded foundations; all the significant modes of vibration and a fairly adequate frequency range; but only reasonably deep and uniform soil deposits that can be modeled as homogeneous half-space. Simple algebraic formulas and dimensionless charts for estimating the dynamic impedances of foundations for all the signficant translational and rotational modes of vibration are presented. The formulas and charts are valid only for a constant depth of embedment and for a solid basemat shape. Practicing engineers are encouraged to make use of results obatined with state-of-the-art formulations when studying the dynamic respone of foundations. The specifc formulas and charts presented in the paper may prove useful for preliminary calculations in the conceptual stage of the design process.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339410
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Gazetas, G
• Publication Date: 1991-9

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 1363-81
• Serial:
  • Journal of Geotechnical Engineering
  • Volume: 117
  • Issue Number: 9
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9410

Subject/Index Terms

• TRT Terms: Charts; Electrical impedance; Formulas; Foundation engineering; Foundations; Mechanical impedance
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00615269
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 30 1991 12:00AM