Secondary development of modified Duncan-Chang model considering disturbance

The modified Duncan-Chang model considering disturbance is secondarily developed to predict the mechanical properties of soil under construction disturbance state more precisely. And the corresponding user subroutine UMAT of ABAQUS, which is a general-purpose finite element analysis system, is programmed. Moreover, the triaxial compressed tests on dry sands are carried out to prove the feasibility of the UMAT. The simulated results show that the predicted values of ABAQUS in which the developed UMAT subroutine has been used agree well with those of the triaxial tests at any disturbance state. Therefore, the secondary development of the modified Duncan-Chang model considering disturbance is feasible. Moreover, it can be widely used in the numerical calculation of geotechnical engineering.