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An improved dynamic hysteretic model for soils

ISSN号：1007-1172
期刊名称：Journal of Shanghai Jiaotong University (Science)
时间：2013.12.5
页码：655-659
分类：TU452[建筑科学—岩土工程;建筑科学—土工工程] V215.52[航空宇航科学与技术—航空宇航推进理论与工程;航空宇航科学技术]
作者机构：[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
相关基金：Foundation item： the National Natural Science Foundation of China （No. 51208296）, the National Key Technology R＆D Program （Nos. 2011BAG07B01 and 2012BAK24B00）, and the National Basic Research Program （973） of China （No. 2011CB013600）
相关项目：非一致地震激励下长隧道多尺度动力分析方法

关键词：迟滞模型, 土壤, 剪切应变, 土动力学, 应变分量, 本构模型, 动态非线性, 应力和, constitutive model, soils, dynamic hysteretic, nonlinear, Ramberg-Osgood model

中文摘要：

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 deviatoric 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. Difculties 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 diferent soil dynamic testing data covering both sands and clays. Results show that the dynamic nonlinear hysteretic behaviors of soils can be well predicted with the improved constitutive model.更多还原

英文摘要：

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.

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