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DOI	10.1016/j.accre.2020.09.010
	Testing and modeling of frozen clay-concrete interface behavior based on large-scale shear tests
	He Peng-Fei; Mu Yan-Hu; Ma Wei; Huang Yong-Ting; Dong Jian-Hua
通讯作者	Ma, W (通讯作者)，Chinese Acad Sci, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	1674-9278
起始页码	83
结束页码	94
卷号	12 期号:1
英文摘要	The shear behavior of the frozen soil-structure interface is important for accurately predicting the interface responses of structures adopted in the cold regions. The purpose of this study is to experimentally and theoretically investigate the shear behavior of frozen clay-concrete interface under engineering conditions. A large-scale direct shear apparatus with a temperature-controlled shear box is used to test the interface behavior. Test specimens consisting of a cement concrete block and frozen soil with initial water content ranging between 14.6% and 24.6% were prepared at different conditions of temperatures (15.4 to -9.8 degrees C), shear rates (0.03-0.9 mm min(-1)), and normal stresses (50-200 kPa). It is found that the peak shear strength is linear developing with increasing of normal stress, initial water content, and temperature. It increased from 67.7 to 133.3 kPa as the initial water content increased from 14.9% to 24.6% at temperature of -6.8 to -6.6 degrees C, and it increased from 51.2 to 80.6 kPa with temperature decreasing from 15.4 to -9.8 degrees C at initial water content of 14.6%-14.9%, furthermore it has a power law relationship with shear rate. The final vertical displacement increases with the decreasing temperature, and increasing initial water content. While, it is slight or could be ignored at lower shear rates (e.g. 0.03 mm min(-1) and 0.15 mm min(-1)) and it is -0.25 mm and -0.28 mm at shear rate of 0.3 mm min(-1) and 0.9 mm min(-1), respectively. In addition, the evolution of vertical displacement also varies with test condition, the growth rate at beginning increases with increasing initial water content and decreasing temperature or ice content, which is because of the ice film effects the particle size. Moreover, a disturbed state concept model combined with linear and nonlinear characteristics is developed to describe the interface shear behavior. The disturbance D reflects the interface mechanical response and responds differently trend for different test conditions, increasing faster with increasing temperature and decreasing initial water content or shear rate. The testing results, including the test and model results, can be used to simulate the performance of engineered geotechnical assets such as earth dams or irrigation channels with concrete linings in cold regions.
关键词	SOIL-STRUCTURE INTERFACE QINGHAI-TIBET HIGHWAY PILE LOAD TESTS ADFREEZE STRENGTH SALINE PERMAFROST HYPERBOLIC MODEL FOUNDATIONS ELEMENT CREEP SAND
英文关键词	Shear strength; Frozen clay-concrete interface; Disturbed state concept; Constitutive model
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000629700700008
来源期刊	ADVANCES IN CLIMATE CHANGE RESEARCH
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/254711
作者单位	[He Peng-Fei; Mu Yan-Hu; Ma Wei; Huang Yong-Ting] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [He Peng-Fei] Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China; [He Peng-Fei; Ma Wei; Huang Yong-Ting] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [He Peng-Fei; Dong Jian-Hua] Lanzhou Univ Technol, Key Lab Disaster Prevent & Mitigat Civil Engn Gan, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	He Peng-Fei,Mu Yan-Hu,Ma Wei,et al. Testing and modeling of frozen clay-concrete interface behavior based on large-scale shear tests[J]. 中国科学院西北生态环境资源研究院,2021,12(1).
APA	He Peng-Fei,Mu Yan-Hu,Ma Wei,Huang Yong-Ting,&Dong Jian-Hua.(2021).Testing and modeling of frozen clay-concrete interface behavior based on large-scale shear tests.ADVANCES IN CLIMATE CHANGE RESEARCH,12(1).
MLA	He Peng-Fei,et al."Testing and modeling of frozen clay-concrete interface behavior based on large-scale shear tests".ADVANCES IN CLIMATE CHANGE RESEARCH 12.1(2021).