摘要
对岩土体常用的单剪屈服强度准则、双剪屈服强度准则和三剪屈服强度准则进行了系统的论述,通过对单剪、双剪和三剪屈服强度准则进行转化,指出岩土的屈服强度准则一般可表达为τ8=g(θσ)f(σm)的函数形式,阐明了单剪、双剪和三剪屈服强度准则的差异主要表现在g(θσ)函数的不同,并进一步解释了中间主应力σ2对岩土类材料屈服强度的影响.
Single-shear yield strength criteria, twin-shear yield strength criteria and three-shear yield scrength criteria are expounded systemetically. Changing formula forms of single-shear, twin-shear and three-shear yield strength criteria, show that many of yield strength criteria of rock and soil materials can be expressed by the τ8 = g(θσ)f(σm) function forms unter the ordinary condition, and that the main differ ences of yield strength value will mainly forcus on the different function forms of g(θσ among single-shear, twin-shear and three-shear yield strength criteria. Intermediate principal stress s influence on yield strength of rock and soil materials is further discussed in the paper.
