MODELING OF CLAY UPLIFT RESISTANCE

In the uplift problem in clays, the self-weight of the clay can have a significant effect on total uplift resistance under certain conditions. The majority of model uplift resistance tests performed to data have failed to account for this effect by neglecting the principles of dimensional similarity. It is demonstrated in this paper, by means of dimensional analysis, when caution must be exercised in interpreting the results of model uplift resistance tests in clay in terms of the prototype. The approach adopted could be applied to other similar problems where model tests are envisaged. Both shallow and deep anchors with high prototype c/gamma gB or c/gamma gD ratios, respectively, can generally be modeled with dimensional similarity by using soft model clays; dimensional similarity in these cases is usually not necessary to obtain a reasonable estimate of the prototype c/gamma gB and c/gamma gD values are low, a satisfactory dimensionally similar model cannot generally be achieved under normal laboratory conditions; in these cases, use of uplift resistance pressure from a dimensionally dissimilar model could lead to a considerable underestimation of prototype uplift resistance pressure.

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  • Accession Number: 00178879
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Sep 27 1978 12:00AM