A modified hyperbolic model containing strain softening

According to the consolidated undrained triaxial shear test of saturated remolded clay, some deficiencies of the Duncan-Chang model in simulating the stress-strain relationship are analyzed, and some causes to the deficiencies are pointed out. In order to come over these deficiencies of the Duncan-Chang model, the nonlinear elastic model proposed by Duncan and Chang is modified with the consideration of the sharp of the stress-strain relationship curve and the strain softening. The new model, containing a curve sharp factor and a softening coefficient parameter, can be used to simulate the strain softening in CU test. The modified hyperbolic model includes six parameters. Each of them has a specific physical meaning and can be confirmed simply. Compared with the Duncan-Chang model, the modified hyperbolic model is much better at simulating the stress-strain relationship of the remolded soft clay.