Mechanical Properties of Similar Materials of Rocks Considering Strain Rate in Vibration Table Tests
LIU Hanxiang
ZHAO Xiaoyu
WANG Mingxuan
XU Peng
Abstract：The vibration table model test of indoor slope is a reduced scale model test.The preparation of similar materials that can reflect the static and dynamic characteristics of rocks is related to whether the model test results can be correctly reversed to the prototype.This paper focused on the mechanical properties and failure modes of similar materials in the range of strain rates in vibration table tests.The results show that:Within the range of strain rates determined by the vibration table model test in this paper,the elastic modulus and crack initiation stress of similar materials of rocks basically do not change with the increase in strain rates,and the uniaxial compressive strength,peak strain,and the number of micro-cracks show three-step changes as a whole.Compared with real rocks,similar materials are more sensitive to strain rates.When the strain rate is greater than 0.5 s-1,the failure mode of similar materials changes,and the failure degree increases significantly,which will lead to the exaggerated failure degree of the prototype slope rock mass after entering the nonlinear deformation stage.Therefore,the calculated strain rate of the model should be controlled within 0.5 s-1.
Keywords：Rock slopeVibration table model testNumerical simulationSimilar material of rockStrain rate effect
Publication Date：2025-06-30
Online Publishing Date：2025-08-25(First online date of this platform, not the publication date of the document)
Pages：12( 125-136 )