基于SMP准则的冻融受荷岩石损伤软化模型

运用损伤理论研究岩石的本构关系一直是岩石力学的热点问题。为进一步深入研究岩石的本构关系,本文根据现有损伤理论,基于SMP破坏准则,采用双参数Weibull统计损伤分布描述岩石微元体的破坏,定量分析了冻融受荷岩石损伤软化规律,构建了冻融受荷岩石统计损伤软化模型,并运用峰值点的偏导数方法确定其参数,最后引用前人相关力学试验数据对模型的合理性进行验证。研究表明：所建的预测模型曲线可以表征岩石的损伤变形,验证了冻融受荷岩石损伤软化过程的一般规律；运用SMP准则可以对冻融-荷载作用下岩石变形特性进行刻画,为冻融荷载作用下岩石变形破坏机制提供了思路。

Parameter Optimization of Point Load Strength Test Based on Clustering Algorithm

Using damage theory to study the constitutive relationship of rock has always been a hot issue in rock mechanics. In order to further study the constitutive relationship of rock, based on the existing damage theory and SMP failure criterion, the damage distribution of rock micro-element is described by two-parameter Weibull statistical damage distribution, and the damage softening law of frozen-thawed rock is quantitatively analyzed. Statistical rock damage intenerated model of frozen-thawed loaded rock is constructed, and the partial derivative method of peak point is used to determine its parameters. Finally, the legitimacy of the model is verified by referring to the previous relevant dynamic test data. The research shows that the established prediction model curve can characterize the damage deformation of rock, which verifies the general law of damage softening process of rock under freeze-thaw loading. The SMP criterion can be used to characterize the deformation characteristics of rock under freeze-thaw load, which provides an idea for the deformation and failure mechanism of rock under freeze-thaw load.