An anisotropic bubble model for soft clays
An anisotropic bubble model for soft clays
复制标题
软粘土各向异性气泡模型
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
D. K. M. Karstunen
中科院分区：
文献类型：
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作者：
N. Sivasithamparam;D. K. M. Karstunen
本文介绍了一种新的天然土各向异性气泡模型的原理。该模型是各向异性S-CLAY 1模型的一个层次扩展。将S-CLAY 1模型的运动屈服面作为边界面，在边界面内引入气泡面。气泡表面的形状类似于S-CLAY 1屈服面，并假设各向同性弹性行为和相关的流动规则。气泡的平移规则用于控制气泡的运动。该模型的实现首先验证了模拟缓慢循环加载与恒定偏应力高岭土，其次，模拟不排水三轴剪切试验（在压缩和拉伸），以突出各向异性的演变的影响，最后，模拟的高数量的加载周期进行检查棘轮功能的模型。
This paper describes the principles behind a new anisotropic bubble model for natural soils. The model is a hierarchical extension of the anisotropic S-CLAY1 model. The kinematic yield surface of S-CLAY1 model is treated as a bounding surface and a bubble surface is introduced within the bounding surface. The bubble surface is similar in shape to the S-CLAY1 yield surface, and assumes an isotropic elastic behaviour and an associated flow rule. A translation rule of the bubble is used to control the movement of the bubble. The implementation of the model is first verified by simulating slow cyclic loading with constant deviator stress on Kaolin clay, and secondly, simulations of undrained triaxial shear tests (in compression and extension) are made to highlight the effect of evolution of anisotropy, and finally, simulations of high number of loading cycles performed to examine ratcheting feature of the model.