Abstract

Info

Author(s):: LIU Yan-hua; XIE Yong-li; School of Highway, Chang’an University

Keywords:: natural soft clay; structure; anisotropy; yielding characteristic; bounding surface model; constitutive simulation

Abstract:: To study the influence of structure and anisotropy on yielding characteristic of natural soft clay, a series of relative tests for Shanghai soft clay were carried out, including onedimensional consolidation test, triaxial undrained shear test and drained stress probe test. At the same time, both structural and anisotropic inner variables were introduced into constitutive equations on the basis of single bounding surface model. The advantage of bounding surface model was verified by comparing the calculation results between the traditional yielding surface model and bounding surface model. The reasonability of the model was verified by the test results of yielding characteristic of natural soft clay. The results show that the modified bounding surface model can reflect the deformation characteristic of natural soft clay more efficiently.