Finite element analysis of pile installation using large-slip frictional contact

摘要: Abstract This paper presents some observations on stress and displacement characteristics during the installation loading of pushed-in piles. A commercial finite element code with capability simulating large-strain frictional contact between two or more solid bodies is used to simulate pile loading. The soil treated as a modified Cam clay material, whereas rigid body. computed total resistance shaft are first compared measured values from centrifuge tests, which indicates that well predicted by model, but not resistance. difference resistances mainly due cone effects introduced in model. paths indicate both mean deviator stresses increase when above at level observation point soil, then decreases once has moved below point. When represented thin layer one radius immediately around pile, extending ground surface distance cone, under elasto-plastic expansion. Just outside this expansion (softening) zone, compression zone ‘U’ form observed. volumetric behaviour significantly affected initial OCR soil. however strongly constitutive model for so-called h/R effect also captured