期刊
GEOMECHANICS AND GEOENGINEERING-AN INTERNATIONAL JOURNAL
卷 6, 期 2, 页码 131-146出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/17486025.2010.546434
关键词
shear bands; pore water drainage; strain localisation; regularisation technique; finite element modelling
资金
- International Centre for Geohazards, (ICG)
- NTNU
The numerical challenges that arise in modelling shear bands in soft sensitive ( SS) clays have not yet been fully resolved. Convincing and well-accepted solutions have yet to be found. This paper presents some novel information related to the shear band phenomenon in SS clays. In this study, the hypothesis is that the generation and dissipation of excess pore pressure from shear bands could regularise the strain softening and result in a mesh independent shear band thickness. The generation and dissipation of excess pressure is modelled by a coupled consolidation process. The simulation aims at modelling two counteracting mechanisms in the SS clay. First, the shear band narrows because of strain softening. Second, the internal pore water pressure drainage reduces the rate of strain softening. This counteracting mechanism provides an inherent regularisation technique for SS clays. This study presents some numerical results involving these two counteracting mechanisms. This study also shows that an inherent internal parameter applicable for SS clays can be defined by the ratio between soil permeability and the applied strain rate. In the case of SS clays, the range of this parameter varies from 0 to 0.0002 mm.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据