Damage softening model and behavior of reinforced soil interface based on the Weibull distribution

A damage-softening model for a reinforced soil interface is proposed based on the trilinear of pullout interface, aiming at softening phenomenon geogrid during process and considering damage process. The variable factor D introduced, it assumed that function displacement. two-parameter Weibull distribution used to express evolution law interface. Based basic control equation calculation stress state different stages under load deduced. To verify accuracy applicability model, prediction results are compared with test ideal elastic–plastic hyperbolic elastic–exponential lognormal in this paper. interfacial shear studied, influence parameters each stage analyzed. show elastic stage, increase stiffness, maximum increases, curvature curve also while modulus opposite. In length, peak value moves free end. residual increases from drawing end tends stress. research accordance actual situation can be applied engineering.