摘要
基于SMP强度准则和三剪切角理论,推导了一般应力状态和轴对称状态下砂土峰值内摩擦角间的转换公式,并研究了中主应力比的影响。考虑到轴对称压缩状态和轴对称拉伸状态所得峰值内摩擦角间的差异,对所得公式进行修正。将修正前后公式的预测结果与真三轴试验结果对比表明,若要合理描述砂土在一般应力状态下的强度特性,应当考虑三轴拉伸和三轴压缩状态下强度参数间差异的影响。
Based on SMP failure criterion and three shear angles theory, two formulas, which express the peak friction angle of sandy soils in general stress condition as that under axisymmetric condition, are deduced. Then, the influence of the intermediate principal stress ratio is studied. These two formulas are modified by taking account of the difference of peak friction angle that exists between axisymmetric compression condition and axisymmetric tension condition. It is shown that the modified formulas can provide reasonable results against experimental results with true triaxial test for sandy soils.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2009年第4期981-984,共4页
Rock and Soil Mechanics
基金
国家自然科学基金资助项目(No.50579051)
国家自然科学基金委员会
二滩水电开发有限责任公司雅砻江水电开发联合研究基金项目(No.50679090)。
关键词
强度
中主应力比
真三轴试验
strength
intermediate principal stress ratio
true triaxial test
