(1. Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;2. Key Laboratory of Geotechnical
and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China;3. School of Civil
Engineering and Transportation,Shanghai Technical College of Urban Management,Shanghai 200432,China;
4. College of Ocean Science and Engineering,Shanghai Maritime University,Shanghai 201306,China)
Abstract:Using the hollow cylinder apparatus,a gravelly soil was tested under triaxial,torsional,triaxial- torsional,and principal stress axes rotational paths. A new loading path was designed to achieve principal axes rotation under various stress levels and constant generalized shear stress during rotating. It is shown that,with the stress level increasing,the generalized shear strain due to principal axes rotation increases first,and then decreases,and increases again. The principal stress axes rotation leads to strength decline and friction angle decrease. The stress circle at failure locates in the interior part of that in triaxial-torsional test. The triaxial and torsional tests were simulated numerically by distinct element method. The results show that the horizontal slip surface is developed under torsional force. The reasons for strength decline due to principal axes rotation are also discussed.
周 健1,2,王子寒1,2,张 姣3,邓益兵4. 不同应力路径下砾石土力学特性的宏细观研究[J]. 岩石力学与工程学报, 2013, 32(8): 1721-1728.
ZHOU Jian1,2,WANG Zihan1,2,ZHANG Jiao3,DENG Yibing4. MACRO-MESO RESEARCH ON MECHANICAL BEHAVIOR OF A
GRAVELLY SOIL UNDER VARIOUS STRESS PATHS. , 2013, 32(8): 1721-1728.
相 彪,张宗亮,迟世春,等. 复杂应力路径下堆石料本构关系研究[J]. 岩土力学,2010,31(6):1 716-1 722.(XIANG Biao,ZHANG Zongliang,CHI Shichun,et al. Study of constitutive relations of rockfill under complex stress path[J]. Rock and Soil Mechanics,2010,31(6):1 716-1 722.(in Chinese))
[4]
沈 扬,周 建,龚晓南. 空心圆柱仪(HCA)模拟恒定围压下主应力轴循环旋转应力路径能力分析[J]. 岩土工程学报,2006,28(3):281-287.(SHEN Yang,ZHOU Jian,GONG Xiaonan. Analysis of ability of HCA to imitate cyclic principal stress rotation under constant confining pressure[J]. Chinese Journal of Geotechnical Engineering,2006,28(3):281-287.(in Chinese))
[1]
杨 光,孙 逊,于玉贞,等. 不同应力路径下粗粒料力学特性试验研究[J]. 岩土力学,2010,31(4):1 118-1 122.(YANG Guang,SUN Xun,YU Yuzhen,et al. Experimental study of mechanical behavior of a coarse-grained material under various stress paths[J]. Rock and Soil Mechanics,2010,31(4):1 118-1 122.(in Chinese))
[3]
YANG Z,LI X,YANG J. Undrained anisotropy and rotational shear in granular soil[J]. Geotechnique,2007,57(4):371-384.
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