Study of damage statistical strength criterion of rock considering the effect of freezing and thawing
ZHANG Huimei
PENG Chuan
YANG Gengshe
YE Wanjun
SHENG Yanjun
LIU Hui
Abstract：Based on the strength of rock micro-unit obeys the Weibull random distribution,a damage constitutive model was built with considering coupling action between freeze-thaw and load,and the test of the mechanical properties of the red sandstone in freeze-thaw cycles was used to verify the rationality of the model.Then,according to the concept of the characteristicsof the stress strain curve,the method of full differential function was employed to establish the damage statistical strength criterion of rock,which considered the effect of freezing and thawing.The results show that the theoretical relationship between the model parameters and the rock deformation and failure parameters can reflect the change of the internal mechanism and the physical quantity,and the theoretical curve of the strength criterion is more approaching to the experimental result,which greatly enhance the adaptability of the criterion.Besides,the strength criterion,which consider the damage characteristics of rock,can reflect the characteristics of the rock strength Mohr envelope curve.Compared with existing researches,the strength criterion advised in this paper has better ability to describe the relationship between stress and strain with strength of rock in different freezing and thawing cycles,and which is helpful to provide reference for the evaluation of structural stability in geotechnical engineering.
Keywords：Weibull distributionconstitutive modelmultivariate functionstrength theory
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 1066-1072 )