A numerical and material coupling method for near-fault engineering disturbance induced earthquake

Abstract

The application relates to a numerical and physical coupling method for near-fault engineering disturbance induced earthquakes, which comprises the following steps: establishing a fault-containing engineering site calculation model in a numerical submodel; simulating the whole process of inducing fault slip; selecting a most easily slippable and unstable nucleation region of the fault; obtaining multi-field coupling boundary conditions; in a test submodel, preparing a fault mudstone sample; converting the multi-field coupling boundary conditions into equivalent loading instructions, transmitting the equivalent loading instructions to the fault mudstone sample; performing a frictional slip test on the fault mudstone sample to obtain a stress-strain relationship, obtain updated fault characteristic parameters and stress values at the boundary of the fault mudstone sample, and real-time adjust a fault constitutive model; transmitting the updated fault characteristic parameters and stress values to the numerical submodel through an interaction module, and updating a stiffness matrix in the numerical submodel. Compared with the prior art, the application has the advantages of real-time numerical and physical coupling of numerical simulation and model test.

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