An Improved Dynamic Hysteretic Model for Soils

A dynamic hysteretic constitutive model for soil dynamics, Ramberg-Osgood model, is introduced and improved in the paper. Since the model is inherently 1D and is assumed to apply to shear components only, other components of the deviatorie stress and strain and their relations in 3D case could not b...

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Published inShanghai jiao tong da xue xue bao Vol. 18; no. 6; pp. 655 - 659
Main Author 禹海涛 王建华 袁勇
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.12.2013
Subjects
Architecture
Computer Science
Electrical Engineering
Engineering
Life Sciences
Materials Science
剪切应变
动态非线性
土动力学
土壤
应力和
应变分量
本构模型
迟滞模型
TU 435
soils
nonlinear
constitutive model
dynamic hysteretic
Ramberg-Osgood model
Online AccessGet full text
ISSN1007-1172
1995-8188
DOI10.1007/s12204-013-1447-5

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Summary:A dynamic hysteretic constitutive model for soil dynamics, Ramberg-Osgood model, is introduced and improved in the paper. Since the model is inherently 1D and is assumed to apply to shear components only, other components of the deviatorie stress and strain and their relations in 3D case could not be fully described. Two parameters, the equivalent shear stress and the equivalent shear strain, are defined to reasonably establish relations between each of stress and strain components respectively. The constitutive equations of the initial Ramberg-Osgood model are extended to generalize the theory into multidimensional cases. Difficulties of the definition of load reversal in 3D are also addressed and solved. The improved constitutive model for soil dynamics is verified by comparisons with different soil dynamic testing data covering both sands and clays. Results show that the dynamic nonlinear hysteretie behaviors of soils can be well predicted with the improved constitutive model.
Bibliography:constitutive model, soils, dynamic hysteretic, nonlinear, Ramberg-Osgood model
31-1943/U
A dynamic hysteretic constitutive model for soil dynamics, Ramberg-Osgood model, is introduced and improved in the paper. Since the model is inherently 1D and is assumed to apply to shear components only, other components of the deviatorie stress and strain and their relations in 3D case could not be fully described. Two parameters, the equivalent shear stress and the equivalent shear strain, are defined to reasonably establish relations between each of stress and strain components respectively. The constitutive equations of the initial Ramberg-Osgood model are extended to generalize the theory into multidimensional cases. Difficulties of the definition of load reversal in 3D are also addressed and solved. The improved constitutive model for soil dynamics is verified by comparisons with different soil dynamic testing data covering both sands and clays. Results show that the dynamic nonlinear hysteretie behaviors of soils can be well predicted with the improved constitutive model.
YU Hai-tao, WANG Jian-hua, YUAN Yong（1. Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200030, China 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 3. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China）
ISSN:1007-1172
1995-8188
DOI:10.1007/s12204-013-1447-5