Mesoscopic Study on the Shear Process of Reinforcement-Soil Interface Under Normal Cyclic Loading
FENG Min
Abstract：In order to further study the interface characteristics and reinforcement mechanism of reinforced soil under dynamic load,based on the laboratory test results,a numerical analysis model of direct shear test of geogrid-gravel interface under normal cyclic load was established by using discrete element software.The meso-mechanism of the shear process of reinforced soil interface under normal cyclic load was analyzed,and the evolution law of particle force at reinforcement-soil interface during shear process was explored.The results show that in the process of interface shear test,the interface between reinforcement and soil changes from small deformation before the peak value to gradually soften to form a shear band with local deformation concentration,and the thickness is about 7-9 times of the average particle size.The force chain tends to be stable with the shearing process,forming a strong chain;the porosity change curve under cyclic loading is between the corresponding upper and lower bound static load tests,and the coordination number is close to or lower than the result of the lower bound load.
Keywords：Normal cyclic loadDirect shear testReinforcement-soil interfaceMesoscopic characteristics
Publication Date：2024-12-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 126-133 )