Image analysis of shallow foundation tests on sand ground and their FE-analysis using a new elasto-plastic model

摘要

In this study a series of loading tests on dense sand under a centrifugal force field was carried out, and a newly developed image analysis method with an accuracy of 0.2 pixels was used to observe detailed deformation of sand models. Loading tests were also analyzed using a two-dimensional FE-analysis with a developed double yield surface model, referred as the MMX-model. The calculated bearing capacity factor, N_γ, compares well with other reported data and that obtained from classical theory. Load-settlement relationships, displacement and strain distributions at pre-peak, peak, and post-peak stages obtained from the FE-analysis agree well with those obtained from the loading tests. The FE-analysis using MMX-model is concluded to be applicable to practical design work with sufficient accuracy to permit prediction of bearing capacity and deformation behavior of ground.