论文部分内容阅读
利用空心圆柱扭剪仪开展了饱和南京细砂液化后常速率加载试验,考虑了有效固结压力和加载速率对饱和南京细砂液化后流体特性的影响,结果表明:液化后静加载过程中剪应力与孔压比的发展具有明显的二阶段特性,且剪应力与孔压比的发展有着良好的线性相关关系,有效围压及加载速率对二者的关系有着明显影响;据此提出一种符合液化后静加载过程的率相关性及孔压相关性流体本构模型,该模型将构成饱和砂土强度的土颗粒摩阻力与土–水黏滞阻力分别表示为时变型和非时变型剪切稀化流体;最后进行了该模型的验证性试验,并将模型预测结果与其他学者研究成果对比,验证试验及对比结果均表明该模型具有较好的适用性。
The saturated cylindrical silt shear tester was used to test the saturated velocity of saturated sand after liquefaction. The effects of effective consolidation pressure and loading rate on the fluid properties of the saturated Nanjing sand after liquefaction were studied. The results show that after liquefaction, The development of stress and pore pressure ratio has obvious two-stage characteristics, and the relationship between shear stress and pore pressure ratio has a good linear relationship, the effective confining pressure and loading rate have a significant effect on the relationship between the two; accordingly, a In line with the rate dependence of hydrostatic static loading and the fluid pressure constitutive model of pore pressure, this model expresses the soil particle resistance and the soil-water viscous resistance of saturated sand as the time-variant and non-time-variant shear respectively Cut thinning fluid. At last, the confirmatory test of this model is carried out, and the result of model prediction is compared with the research results of other scholars. The verification test and comparison results show that the model has good applicability.