APPLYING A STOCHASTIC ELASTO-PLASTICITY APPROACH TO EVALUATE INFLUENCE OF SOIL UNCERTAINTY ON HYSTERESIS CHARACTERISTICS

Abstract

 In this paper, the influence of soil uncertainty on hysteresis characteristics is evaluated by applying a stochastic elasto-plastic model to simulate the stress-strain relation of undrained clay. The stochastic model is based on stochastic return mapping algorithm which is expanded by spectral expansion. It is shown that the stochastic approach can evaluate more realistic hysteresis characteristics, even with elastic-perfectly plastic von Mises model. The uncertainty of dynamic deformation characteristics is estimated by calculating the influence of soil uncertainty on the response fields.