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本文通过作者的试验结果及以前一些研究者的试验结果,重点分析比较了应用于混凝土双轴应力破坏的库伦—摩尔准则、八面体应力关系准则、主拉应变准则、格里非斯准则等。找出其中有些理论假设的不合理之处,最后在反映混凝土破坏的基础上,认为主拉应变准则运用于双轴应力下混凝土的破坏是比较合理的,并建议在双轴应力下混凝土运用主拉应变准则,这对混凝土及钢筋混凝土结构在复合应力状态下的强度计算是具有一定意义的。
This article through the author’s test results and previous research results of some researchers, focusing on the analysis and application of the Coulomb-Mohrs criterion, the octahedral stress relationship criterion, the principal tensile strain criterion, the Griffith criterion, etc. applied to biaxial stress failure of concrete. To find out some of the theoretical assumptions are unreasonable, and finally on the basis of reflecting the concrete damage, it is reasonable to assume that the principal tensile strain criterion is applied to the concrete under biaxial stress, and it is recommended that the concrete be used under biaxial stress. The tensile strain criterion is of significance to the calculation of the strength of concrete and reinforced concrete structures under complex stress conditions.