Analysis Of Slope Stability Considering Tensile Shear-strength Under The Earthquake

A large number of landslides caused by earthquake in southwest china,Cause great damage to the natural environment and has brought huge potential risk to the lives of the residents.According to the investigation of a large number of landslides after the earthquake,a lot of slope under earthquake in the area of the soil stress state of tensile shear and the basic soil in the unsaturated state.Earthquake effect has a great influence on the stability of the slope.1.Because the classical Mohr-Coulomb strength criterion is too high to estimate the tensile shear strength,the Mohr-Coulomb strength criterion is modified to form a more accurate and reasonable modified Mohr-Coulomb strength criterion.ABAQUS own Mohr-Coulomb strength criterion does not take into account the tensile shear strength of the soil and is based on the classical Mohr-Coulomb strength criterion,so according to the need to develop their own user material subroutine UMAT analysis.2.Under the effect of gravity,established to consider whether the four conditions and strength characteristics of unsaturated shear,comparative analysis of the tensile shear strength and non saturation characteristics on slope stability influence.3.Under the effect of earthquake,Based on the theory of viscoelastic boundary,provide accurate artificial boundary for slope stability analysis,the dynamic response of slope and the influence of P wave or SV wave on slope stability at different slope angles or different incident angles is analyzed by using the modified Mohr-Coulomb criterion and the strength parameters of unsaturated soil.