Annealable behaviour of saturated clay : An experiment and simulation
Annealable behaviour of saturated clay : An experiment and simulation
复制标题
饱和粘土的可退火行为：实验和模拟
DOI：
10.3208/sandf.35.4_9
复制
发表时间：
1995
影响因子：
3.7
通讯作者：
T. Noda
中科院分区：
文献类型：
--
作者：
A. Asaoka;M. Nakano;T. Noda
完成不排水三轴压缩试验后，以恒定的轴向应变率破坏，粘土试样连续经受相同的轴向应变率，但从外部通过顶部和底部边界的孔隙水供应。然后，粘土表现出类似软化的膨胀行为。在此基础上，对一系列三轴试验进行了土-水耦合有限变形数值模拟，模拟结果与试验结果基本一致。粘土试样的表观软化行为被证明是由于土壤元素的行为，穿过临界州线。粘土的退火行为也被证明是可能的膨胀后失败，其中粘土作出了“复出”从目前的正常固结状态到以前的正常固结状态。文中还给出了在q：p'：v空间中的应力路径.
After complation of an undrained triaxial compression test to failure with a constant rate of axial strain, a clay specimen was continuously subjected to the same rate of axial strain but with a pore water supply from outside through top and bottom boundaries. The clay, then, exhibited a softening-like behaviour with swelling. A series of these triaxial experiments was next numerically simulated based on the soil-water coupled finite deformation computation using the original Cam-Clay constitutive model, in which a clear distinction was made between a triaxial soil specimen and soil elements in it. The simulation exhibited almost the same post-failure behaviour as that observed in experiment. Apparent softening behaviour of the clay specimen was demonstrated due to the behaviour of soil elements that traversed the critical state line. Annealable behaviour of clay was also shown possible with swelling after failure, in which the clay made a "comeback" from a current normally consolidated state to a former normally consolidated state. The stress path for which in a q : p' : v space was also illustrated.