EFFECTS OF FOOTING SIZE, WEIGHT AND EXCITATION LEVEL ON RESONANT FREQUENCIES OF FOUNDATION SYSTEMS ON COHESIVE SOIL

An analysis is presented for the influence of footing size, total weight, and level of excitation on the value of the vertical mode of resonant frequency for reinforced concrete, prototype, circular footings supported on cohesive soil and subjected to vertical sinusoidal loading of a nature prevalent in industrial facilities, such as machine foundations. Knowledge of such effects are important considerations in designing industrial machine foundations in order to avoid resonance. Footing diameters range from 5 ft-2 in to 10 ft-4 in, total weights from 6.41 tons to 25.64 tons, static pressure levels from 2.56 psi to 10.25 psi, and applied excitation levels from 0.26 tons to 26 tons. The experimental response is definitely of an underlinear nature. Resonant frequencies decrease as a power of the contact area between the footing and supporting soil, increase as a power of the total weight of the system, and decrease with an increase in excitation level. Natural frequency is defined in terms of a zero excitation level. /Author/

  • Corporate Authors:

    Editions Sols-Soils

    54 Avenue de la Motter-Picquet
    Paris 16e,   France 
  • Authors:
    • Kondner, R L
  • Publication Date: 1965-3

Media Info

  • Features: Figures;
  • Pagination: p. 11-13
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00263805
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 9 1975 12:00AM