地震工程学报2016，Vol.38Issue(4)：554-557,587,5.DOI:10.3969/j.issn.1000-0844.2016.04.0554
中主应力对击实黄土强度和变形特性的影响
Effect of Intermediate Principal Stress on Strength and Deformation Characteristics of Compacted Loess
摘要
Abstract
To study the impact of intermediate principal stress on the strength and deformation behavior of compacted loess,a series of tests with the principal stress orientation angle fixed at 0° were carried out using a hollow cylinder apparatus (HCA).The impact of the intermediate princi-pal stress coefficient b on the strength and deformation of compacted loess is discussed.Test results revealed that at different intermediate principal stress coefficients,the developed models of generalized shear stress-strain curves were basically the same.The generalized shear stress-strain curves were not significantly different and the specimens showed significant ductility during the late stages of shear.The intermediate principal stress significantly affected the strength of the compacted loess.The normalized maximum strength was at b=0.25 and the minimum at b=0.5. The strength increased with b from 0 to 0.25.The strength was at its peak when b=0.25,then decreased rapidly as b increased further.The minimum strength reached was when b=0.5,the strength first increased,then decreased as b increased further.With the increase in the intermediate principal stress coefficient,the effective internal friction angle of the compacted loess showed a tendency to increase.The strength parameter was at a minimum when b=0,a maximum when b=0.75,and was greater in b=1 (triaxial tension)than b=0 (triaxial compression).关键词
中主应力系数/击实黄土/应力应变/强度/有效内摩擦角Key words
coefficient of intermediate principal stress/compacted loess/stress and strain/strength/effective internal friction angle分类
建筑与水利引用本文复制引用
张吾渝,陈伟,常立君,介玉新,王萌,罗传庆..中主应力对击实黄土强度和变形特性的影响[J].地震工程学报,2016,38(4):554-557,587,5.基金项目
青海省科学技术厅应用基础研究计划(2015-ZJ-720 （）
2012-Z-708) （）
清华大学水沙科学与水利水电工程国家重点实验室开放研究基金项目(sklhse-2014-D-03) （sklhse-2014-D-03）
青海省高等学校地基与基础教研创新团队项目 （）
青海大学教学名师培育计划项目 （）
