YAN Zhen, WANG Yuan-zhan, XIAO Zhong, et al. Dynamic finite element analyses of undrained strength degradation of
soft clay in ABAQUS under cyclic loading[J]. 2016, 37(S2): 735-744.
YAN Zhen, WANG Yuan-zhan, XIAO Zhong, et al. Dynamic finite element analyses of undrained strength degradation of
soft clay in ABAQUS under cyclic loading[J]. 2016, 37(S2): 735-744.DOI: 10.16285/j.rsm.2016.S2.093.
Post-cyclic undrained strength degradation happens to the saturated soft clay under wave cyclic loading for the excess pore pressure produced
resulting in the significant loss of bearing capacity of the breakwater. Based on the development model of pore pressure and the rule of shear strength of normally consolidation soft clay
the dynamic degradation law of soft clay strength is derived considering the effect of initial static deviator stress. Based on the dynamic degradation law and Mohr-Coulomb yield strength
the numerical development and dynamic calculation process for post-cyclic undrained strength degradation is implemented into software ABAQUS. Numerical simulations of the dynamic and static triaxial tests of Tianjin soft clay are conducted using the proposed dynamic finite element method. Results show that the development curve of maximum excess pore pressure and values of post-cyclic undrained strength predicted by the finite element method are acceptable compared with tests. Moreover
the proposed method can predict the process of post-cyclic strength degradation.