NDLI: Relationship between deviator stress and axial strain of unsaturated loess under coupling of stress and moisture

Content Provider	IEEE Xplore Digital Library
Author	Cunli Chen Yuzhu Dong Chengming Cao Xue Jiang Lianying Liu
Copyright Year	2011
Description	Author affiliation: Research Institute of Geotechnical Engineering, Xi'an University of Technology, China (Cunli Chen; Yuzhu Dong; Chengming Cao) \|\| Shanxi Expressway Testing Measuring Co. Ltd, Xi'an, China (Lianying Liu) \|\| Northwest Municipal Engineering Design Research, Institute of China, Lanzhou, China (Xue Jiang)
Abstract	In order to obtain the formula of relationship between deviator stress and axial strain under coupling change of initial degree of saturated and deviator stress, the consolidated—drained triaxial tests are conducted on Xi'an undisturbed loess under different water contents. Based the principle of equivalent deformation, the equivalent deviator stress of structure is defined by using deviator stress difference between unsaturated and saturated loess under the same confining stress and axial strain. The conception and method of effective stress principle and the equivalent stress of structure and fluid on unsaturated loess are developed from compression stress to triaxial stress. The expression of effective deviator stress of unsaturated loess is established under triaxial stress. Relations between equivalent deviator stress of structure and degree of saturation as well as deviator stress are investigated. The formula of equivalent deviator stress of structure is proposed which can reflect coupling of moisture and stress. According to the expression of effective deviator stress and equivalent deviator stress of structure under triaxial stress, the formula of relationship between effective deviator stress and axial strain of unsaturated loess is established on the basis of hyperbola formula of saturated loess by using initial degree of saturated and stress as variables. For a sort of unsaturated and saturated loess, the formula has general parameters. The relationship between deviator stress and axial strain and that between effective deviator stress and axial strain as well as the tangent modulus can be calculated under coupling or respective change of initial degree of saturated and deviator stress by the formula. The calculating results are accord with the test results.
Starting Page	4305
Ending Page	4310
File Size	386271
Page Count	6
File Format	PDF
ISBN	9781457702891
e-ISBN	9781457702907
DOI	10.1109/ICETCE.2011.5775779
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-22
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Traxial tests Equivalent deviator stress of structure Moisture Unsaturated intact loess Coupling of moisture and stress Stress Strain Strontium Couplings Fluids Effective stress Relationship between stress and strain Testing
Content Type	Text
Resource Type	Article

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