Load–displacement solutions for piles and shallow foundations based on deformation fields and energy conservation

  • Klar A
  • Osman A
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The paper presents an energy approach for the predic- tion of non-linear foundation behaviour. The formulation entails three main stages: (a) assumption of admissible pattern functions from which displacement fields can be assembled; (b) equating external work to internal work; and (c) minimisation of internal work by variation of the displacement field using the different pattern functions. The approach is demonstrated on two problems: (a) a vertically loaded shallow foundation; and (b) laterally loaded piles. The approach is evaluated by comparison with finite difference analyses using three different con- stitutive models. It is shown that the approach provides a fair estimation of the overall foundation response. Under large displacements the method degenerates into conven- tional upper-bound calculations.

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  • A. Klar

  • A. S. Osman

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