COUPLED SLIDING AND ROCKING OF FOUNDATIONS ON LAYERED MEDIA

A two-dimensional, lumped-parameter model is used to investigate the steady-state coupled sliding and rocking behavior of an infinitely long, rigid foundation bonded to the surface of a linearly elastic, layered half-space. Wide ranges of soil properties, foundation dimensions, and thicknesses of the top layer are considered, and typical results are presented for the maximum amplitudes of the sliding and rocking oscillations and the frequencies at which these maximum amplitudes occur. The natural frequencies of the system with radiation damping are dependent on the shear wave velocity and poisson's ratio of the half-space material, the geometric proportions of the foundation, and the thickness of the top layer. The total peak amplitude of vibration for the coupled motion is expressed in terms of a linear function whose coefficients are dependent on poisson's ratio, the foundation dimensions, and the thickness of the top layer, and graphical relationships are presented to facilitate the determination of these coefficients. The results clearly illustrate that stratification of the soil may significantly affect the total peak amplitude of the foundation for a given exciting force, but this influence becomes negligible when the top layer is thicker than one and a half times the width of the foundation. /Author/TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00465828
• Corporate Authors:

  Southeast Asian Society of Soil Engineering

  P.O. Box 2754
  Bangkok,   Thailand 
• Authors:
  • Parmelee, R A
  • Krizek, T J
  • Gupta, D C
• Publication Date: 1974-6

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 1-19
• Serial:
  • GEOTECHNICAL ENGINEERING
  • Volume: 5
  • Issue Number: 1
  • Publisher: SOUTHEAST ASIAN GEOTECHNICAL SOCIETY
  • ISSN: 0046-5828

Subject/Index Terms

• TRT Terms: Amplitude; Damping (Physics); Dimensional analysis; Foundation soils; Foundations; Half spaces; Mathematical models; Mechanical elasticity; Motion; Pavement layers; Poisson distributions; Poisson ratio; Shear strength; Size; Soils; Stiffness; Stratification; Thickness; Vibration
• Old TRIS Terms: Dimensional measurement; Foundations (Structures); Poissons ratio
• ITRD Terms: 6988: Amplitude; 5559: Damping; 9014: Dimension; 5912: Elasticity; 3377: Foundation; 6477: Half space; 6473: Mathematical model; 5483: Movement; 5924: Poisson's ratio; 5531: Shear; 4156: Soil; 5931: Stiffness; 5933: Thickness; 5558: Vibration
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00125139
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Nov 18 1975 12:00AM