REAL-TIME CT MESO-TESTING ON SHANGHAI SILTY CLAY SUBJECTED TO TRIAXIAL LOADING
REAL-TIME CT MESO-TESTING ON SHANGHAI SILTY CLAY SUBJECTED TO TRIAXIAL LOADING
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发表时间：
2005
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通讯作者：
M. Wei
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作者：
M. Wei
对粉质粘土在三轴加载条件下的应力-应变曲线进行了实时CT扫描试验研究，根据CT值和CT图像，将土的应力-应变曲线划分为4个阶段，即应力-应变曲线的峰值和峰值。细观缺陷闭合阶段、初始损伤阶段、快速损伤发展阶段和软化破坏阶段。粉质粘土是典型的非均匀、原始损伤材料，在加载过程中，形成局部变形，土体的破坏是由局部变形和剪切带的形成引起的，宏观裂缝在强度峰值和峰值后完全产生。
Studies on silty clay subjected to triaxial loading by using real-time computed tomography(CT) scanning experiment are carried out.Based on the CT-number and CT images,it is shown that the stress-strain curve of soil can be divided into four stages?micro-defects closing stage,initial damage stage,rapid damage development stage,and softening failure stage.Silty clay is a typically nonuniform and original damaged material.During loading process,local deformation is formed;and the failure of soil is caused by local deformation and formation of shear band.Macro-fissure will be completely generated at the peak and post-peak of strength.