Research and application of nonlinear elastic–hardening interfacial constitutive model in disturbed belt

摘要

The geological structure of disturbed belt is considered as a ‘sandwich biscuit’ which contactsnupper and lower interfaces and clamps weak belts in the interlayer. Based on the law of field tests,nthe nonlinear elastic–hardening contact constitutive model is built. By means of the FISHnlanguage of FLAC3D, which can study and judge elements automatically, the calculationnparameters of shear stiffness and friction angle can be dynamically regulated. According to thenfield test results, Ks and w can be regression inversion analysed using neural network. Byncomparing numerical analysis with the field test results, it is concluded that the model can betternreflect the mechanical properties of the interface.