STRESS-INDUCED ANISOTROPIC G SUB MAX OF SANDS AND ITS MEASUREMENT
STRESS-INDUCED ANISOTROPIC G SUB MAX OF SANDS AND ITS MEASUREMENT
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DOI：
10.1061/(asce)1090-0241(1999)125:9(741
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发表时间：
1999-09
影响因子：
3.9
通讯作者：
X. Zeng;B. Ni
中科院分区：
文献类型：
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作者：
X. Zeng;B. Ni
由于各向异性土组构或各向异性应力条件，大多数土的弹性剪切模量\IG\dm\da\dx存在各向异性。本文从理论和实验两方面研究了砂土在\iK\d0应力条件下的\IG\dm\da\dx各向异性。采用弯曲单元法测定了两种砂土在多应力面条件下的弹性剪切模量。研究了砂土在加载和卸载过程中的应力诱导各向异性（IG\dm\da\dx）及其重要影响因素。根据实验数据，提出了一种估算\iK\d0的经验关系式.测量了非主应力面的剪切模量，并与理论计算结果进行了比较。研究了多个应力平面上应力循环对\IG\dm\da\dx的影响。
Anisotropy in elastic shear modulus \iG\dm\da\dx exists in most soils as the result of either anisotropic soil fabric or anisotropic stress conditions. This paper presents a theoretical and experimental study on the anisotropy in a \iG\dm\da\dx of sand due to a \iK\d0 stress condition. Elastic shear moduli of two types of sand in multiple stress planes under a \iK\d0 condition were measured using bender elements. Stress-induced anisotropy in \iG\dm\da\dx of the sands during loading and unloading processes and the important influential factors were investigated. An empirical relatinship for the estimation of \iK\d0 was proposed based on the experimental data. Shear moduli in nonprincipal stress planes were measured and compared with the results from the theory. The influence of stress cycles on \iG\dm\da\dx in multiple stress planes was studied.