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DOI	10.1002/nag.3306
	A framework for constructing elasto-plastic constitutive models for frozen and unfrozen soils
	Yu, Fan; Guo, Peijun; Na, SeonHong
通讯作者	Yu, F (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China.
发表日期	2022
ISSN	0363-9061
EISSN	1096-9853
起始页码	436
结束页码	466
卷号	46 期号:2
英文摘要	The need for unified constitutive models for frozen and unfrozen soils in simulating frost heave and thaw consolidation has been recognized. However, a reliable and easy-to-implement model is not yet available. This paper extends the one-dimensional elasto-plastic model proposed by Yu et al. to solve multi-dimensional problems. In the extended model, total and effective stresses are taken as the stress variables for frozen and unfrozen soils, respectively. A critical-state-based mode, Clay And Sand Model (CASM), is employed for soil at unfrozen states. The emphasis is placed on how a basic constitutive model for unfrozen soils is extended to describe the elasto-plastic behavior for both unfrozen and frozen soils in two steps: (1) extension of the constitutive model from unfrozen to frozen soils by considering ice-bonding effect, and (2) integration of descriptions for soils at unfrozen and frozen states using the concept of residual stress (by Nixon and Morgenstern). The freeze-thaw cycling effect is naturally incorporated by the introduction of residual stress line that is used to determine the initial stress state and preconsolidation pressure of thawed soil. After being implemented into FORTRAN subroutines for ABAQUS, the performance of the proposed model is demonstrated by simulating triaxial compression tests on frozen sand at different temperatures under confining pressures, and freeze-thaw cycling processes of silty clay under loading.
关键词	FROST HEAVE CHARACTERISTICS FREEZE-THAW CYCLES MECHANICAL-BEHAVIOR COMPRESSIVE STRENGTH ANISOTROPIC DAMAGE UNSATURATED SOIL STRESS-DILATANCY SHEAR-STRENGTH VOLUME CHANGES WATER-CONTENT
英文关键词	elasto-plastic model; frost heave; frozen soil; freeze-thaw; thaw consolidation
语种	英语
WOS研究方向	Engineering ; Materials Science ; Mechanics
WOS类目	Engineering, Geological ; Materials Science, Multidisciplinary ; Mechanics
WOS记录号	WOS:000729764000001
来源期刊	INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254222
作者单位	[Yu, Fan] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Yu, Fan; Guo, Peijun; Na, SeonHong] McMaster Univ, Dept Civil Engn, Hamilton, ON, Canada
推荐引用方式 GB/T 7714	Yu, Fan,Guo, Peijun,Na, SeonHong. A framework for constructing elasto-plastic constitutive models for frozen and unfrozen soils[J]. 中国科学院西北生态环境资源研究院,2022,46(2).
APA	Yu, Fan,Guo, Peijun,&Na, SeonHong.(2022).A framework for constructing elasto-plastic constitutive models for frozen and unfrozen soils.INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS,46(2).
MLA	Yu, Fan,et al."A framework for constructing elasto-plastic constitutive models for frozen and unfrozen soils".INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS 46.2(2022).