固结比对土最大动剪切模量的影响

英文篇名：Effects of consolidation ratios of soils on maximum dynamic shear modulus
中文刊名：世界地震工程
英文刊名：World Earthquake Engineering
作者：孙静 ; 袁晓铭 ; 孙锐
英文作者：SUN Jing1 ; YUAN Xiaoming2 ; SUN Rui2(1.Institute of Civil Engineering ; Heilongjiang University ; Harbin 150080 ; China ; 2.Institute of Engineering Mechanics ; China Earthquake Administration ; Harbin 150080 ; China)
中文关键词：固结比 ; 动剪切模量 ; 土 ; 共振柱试验
英文关键词：consolidation ratio ; dynamic shear modulus ; soil ; resonant column tests
出版日期：2010-12-15
机构：黑龙江大学建筑工程学院;中国地震局工程力学研究所;
年：2010
期：S1
出版单位：世界地震工程

摘要

采用共振柱试验方法,研究了固结比对土最大动剪切模量的影响并给出了土最大动剪切模量的建议公式。通过对砂土、粉质黏土和粉土的系统试验,提出了不同固结比下土最大动剪切模量与固结比kc-1呈指数形式的增长模式,不同于Hard in公式最大动剪切模量与固结比kc呈直线形式的增长模式。同时给出了计算不同固结比下砂土、粉质黏土和粉土最大动剪切模量的建议公式,并与Hard in公式进行了对比,结果表明,固结比对土最大动剪切模量影响程度明显比Hard in公式要大,固结比对粉质黏土和粉土最大动剪切模量的影响程度要比对砂土的影响程度更大。
The effect of the consolidation ratios on the maximum dynamic shear modulus(DSM) for three types of soils was investigated by using the resonant column device tests.According to Hardin and Black's formula,Gmax/G0-kc the maximum DSM,nearly linearly increases with the increasing of consolidation ratio,but according to the experiment,the power function is suitable for describing the variation of the maximum DSM with the consolidation ratio kc-1 due to kc>1.0.Also,the incremental formula for calculating the maximum DSM in the cases of the anisotropic consolidation is presented.The new formula indicates that the increasing degree of the maximum DSM due to kc>1.0 is significantly larger than that predicted by Hardin and Black's formula.Compared with sand,the increment of the maximum DSM of silty clay and silt due to the anisotropic consolidation is much larger than that of sand.

引文

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