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基于最弱链模型和Weibull分布假设,采用损伤理论,建立了冻结状态下单轴压缩中砂岩损伤统计本构模型。然后采用WDT-100冻土试验机对不同体积中砂岩试样进行单轴压缩试验,分析了试验结果和冻结中砂岩力学参数和体积间的关系,得到了考虑体积因素的冻结中砂岩损伤统计本构模型参数。最后将其他体积冻结中砂岩试样的理论曲线与试验结果进行对比,两者吻合较好,显示了所建模型的合理性。
Based on the assumption of the weakest chain and Weibull distribution, a statistical constitutive model of sandstone damage in uniaxial compression under freezing condition is established by using damage theory. And then the WDT-100 frozen soil testing machine was used to uniaxial compression test of sandstone samples of different volumes. The relationship between the experimental results and the mechanical parameters and volume of sandstone in freezing was analyzed. The sandstone damage statistics Model parameters. Finally, the theoretical curves of the sandstone samples in other volume freezing are compared with the experimental results, which shows that the model is reasonable.