FINITE ELEMENT SIMULATION OF BEHAVIOR OF LATERALLY LOADED PILES IN PERMAFROST

A new method based on the finite element technique which is analogous to the method of initial strains used in continuum mechanics is presented. This method uses a Maxwell model to accommodate an initial elastic subgrade modulus, independent of time. Thereafter, creep displacements are produced and are then transformed into fictitious nodal forces acting at each node. The details of the solution, the basic procedure of the proposed method, and the computer program are described. The study results are compared with field data. It is noted that one can now analyze laterally loaded piles using 2 approaches: first uses a secant k modulus and the second a flow rule for creep displacements that are both nonlinear functions of the applied net pressure. Both agree on the fact that the soil reactions vary in time. Also, both techniques rely on an initial k(t=0) modulus. In the former, however, the reaction modulus decreases with time to a very low fictitious value, while in the latter, this problem is circumvented by using a flow rule for the creep displacements.

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: p. 266-284
  • Serial:

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Filing Info

  • Accession Number: 00493833
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 30 1990 12:00AM