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FEM error due to discretization in the space domain causes inaccuracies in the nonlinear dynamic analysis of saturated soil, especially in the analysis of liquefaction considering large deformation. An adaptive strategy includes an error estimate and mesh refinement, in which the approximation is refined successively to a predetermined standard of accuracy, is essential to the effective use of finite element codes for practical analyses. In this paper, a posteriors error estimate procedure and h-adaptive FE are applied to liquefaction analysis of saturated soil using the elasto-plastic constitutive model and updated Lagrangian formulation. The advantage of this method is shown by the analysis of three numerical examples of saturated soil.

A POSTERIORI ERROR ESTIMATE AND <i>H</i>-ADAPTIVE FE ANALYSIS OF LIQUEFACTION WITH LARGE DEFORMATION