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人们长期沿用的线性屈服准则已越来越表现出了它的局限性.在复杂应力状况下,随着围压的增大,强度达到最大值,然后又逐渐降低. 在主应力空间形成一个抛物形屈服面.此屈服面依赖于冻土的粘聚力和内摩擦角,并随温度的变化而变化.本文给出了抛物型屈服准则以及一些参数,此准则在低应力状态下可转化为线性屈服准则.
The long-term linear yield criterion has shown its limitations more and more.When the confining stress increases, the strength reaches its maximum value and then decreases gradually, forming a parabola in the main stress space The yield surface depends on the cohesion and the internal friction angle of the frozen soil and changes with the temperature.This paper presents the parabolic yield criterion and some parameters which can be transformed into Linear yield criterion.