دانلود گزارش کارورزی و کار آموزی

چکیده : 

This paper presents a finite element approach to analyse the response of shallow foundations on soils

with strain-softening behaviour. In these soils, a progressive failure can occur owing to a reduction of

strength with increasing the plastic strains induced by loading. The present approach allows this failure

process to be properly simulated by using a non-local elasto-viscoplastic constitutive model in conjunction

with a Mohr–Coulomb yield function in which the shear strength parameters are reduced with the

accumulated deviatoric plastic strain. Another significant advantage of the method is that it requires few

material parameters as input data, with most of these parameters that can be readily obtained from conventional

geotechnical tests. To assess the reliability of the proposed approach, some comparisons with

experimental results from physical model tests are shown. A fairly good agreement is found between

simulated and observed results. Finally, the progressive failure process that occurs in a dense sand layer

owing to loading is analysed in details, and the main aspects concerning the associated failure mechanism

are highlighted