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DOI	10.1016/j.coldregions.2017.10.013
	A creep constitutive model for frozen soils with different contents of coarse grains
	Hou, Feng; Lai, Yuanming; Liu, Enlong; Luo, Huiwu; Liu, Xingyan
发表日期	2018
ISSN	0165-232X
EISSN	1872-7441
起始页码	119
结束页码	126
卷号	145
英文摘要	The triaxial creep tests of frozen silty clay mixed with different contents of coarse grains were performed at 0.3 MPa confining pressure at - 10 degrees C. Four sets of mass ratio of coarse-grained particles to silty clay are 0.0, 0.2, 0.4 and 0.6 used to form the frozen samples, and the test results demonstrate that: when the shear stress level is low, the tested sample exhibits an attenuation creep; when the shear stress level is high, the tested sample behaves as a non-attenuation creep. It is found that the initial shear modulus and yield strength become greater with the increasing mass ratio of coarse-grained particles to silty clay, but the long-term strength shows an opposite trend. Through the analysis of creep mechanism, both the new hardening variable and damage variable are introduced to improve the Nishihara model, and the three-dimensional formulation of the model is also formulated. According to the experimental results and analysis on the creep model, the model parameters are determined and identified. The simulation results show that the new model can describe the whole creep process of artificial frozen soils with different contents of coarse-grained particles well. Finally, the influences of the mass ratio of coarse-grained particles to silty clay on the parameters are also analyzed, which provides a reference for engineering application in cold regions.
英文关键词	Hardening; Damage; Mass ratio of coarse-grained particles to silty clay; Creep constitutive mode
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS关键词	SALT ROCK ; DAMAGE ; BEHAVIOR ; REGIONS
WOS记录号	WOS:000415834800012
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239474
作者单位	[Hou, Feng; Liu, Enlong; Luo, Huiwu] Sichuan Univ, Coll Water Resources & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R China; [Lai, Yuanming; Liu, Enlong; Liu, Xingyan] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Inst, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Hou, Feng,Lai, Yuanming,Liu, Enlong,et al. A creep constitutive model for frozen soils with different contents of coarse grains[J],2018,145.
APA	Hou, Feng,Lai, Yuanming,Liu, Enlong,Luo, Huiwu,&Liu, Xingyan.(2018).A creep constitutive model for frozen soils with different contents of coarse grains.COLD REGIONS SCIENCE AND TECHNOLOGY,145.
MLA	Hou, Feng,et al."A creep constitutive model for frozen soils with different contents of coarse grains".COLD REGIONS SCIENCE AND TECHNOLOGY 145(2018).