西北地震学报2011，Vol.33Issue(4)：349-353,5.
干密度对预剪应力下重塑黄土动力特性影响的试验研究
Experimental Study on the Effects of Dry Density on Dynamic Properties of Remodeled Loess under Condition of Pre-shearing Stress
摘要
Abstract
Dry density is an important controlling index of the geotechnical engineering constructions. With different dry densities and different initial average principal stresses, the dynamic torsional shear triaxial tests are carried out on remodeled loess under the condition of pre-shearing stress, which is produced by rotation of principal stress axes (αo=45°). Research results show that the dry density has little effect on the dynamic shear modulu of remodeled loess under the condition of pre-shearing stress. Initial average principal stress has some certain effect on the modulu. If other conditions being the same, the dynamic shear modulu and initial dynamic shear modulu increase with the increase of dry density and initial average principal stress. The damping ratios of remodeled loess first decrease with the increase of the dynamic shear strain and then increase gradually. The effects of dry density and initial average principal stress on damping ratio of remodeled loess are insignificant.关键词
重塑黄土/预剪应力/干密度/动剪切模量/阻尼比Key words
Remodeled loess/ Pre-shearing stress/ Dry density/ Dynamic shear modulus/ Damping ratio分类
建筑与水利引用本文复制引用
王志杰,骆亚生,谭东岳,李浩东..干密度对预剪应力下重塑黄土动力特性影响的试验研究[J].西北地震学报,2011,33(4):349-353,5.基金项目
国家自然科学基金(50578134) （50578134）
教育部新世纪优秀人才支持计划(NECT-06-0864) （NECT-06-0864）
