MECHANICAL BEHAVIORS OF SATURATED SAND UNDER COMPLICATED LOADING

• 来源期刊: 固体力学学报(英文版)
• 学科: 工学
• 关键词: 凡口 口孔 试味 山越 移动 八一
• 年，卷（期）: 2004,（1）
• 页码范围: 32-44
• 页数: 13页
• 分类号: TB302
• 语种: 中文

摘要

The different physical states of saturated sand, including shear elasticity, positive dilatancy, and negative dilatancy (preliminary negative dilatancy, secondary negative dilatancy and reversal negative dilatancy) are revealed based on the pore water pressure response of saturated sand in undrained dynamic torsional tests of thin cylinder samples and also checked by the drained cyclic triaxial tests under a given mean effective normal stress. According to the effective stress path of different physical states under the undrained cyclic torsional tests the physical state transformation surface, stress history boundary and yield surface are determined, and the state boundary surface is also determined by the range of effective frictional stress state movement. Based on the moving yield surface without rotation, and the expanding stress history boundary surface relevant to the stress path variations under different physical states in 3D stress space, a physical state model is proposed to provide a new app