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DOI	10.1016/j.soildyn.2021.107010
	Dynamic responses of frozen subgrade soil exposed to freeze-thaw cycles
	Zhou, Zhiwei; Li, Guoyu; Shen, Mingde; Wang, Qingzhi
通讯作者	Li, GY (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	0267-7261
EISSN	1879-341X
卷号	152
英文摘要	The current paper reports an experimental investigation that aims to determine the effects of freeze-thaw cycles (cycle number and freezing low temperature) on the dynamic responses of frozen subgrade soil. The test results indicate that the curve level for the dynamic shear modulus (damping ratio) first decreases (increases) and then remains approximately stable at a small strain range with increasing freeze-thaw cycles. These critical cycle numbers for the dynamic shear modulus (damping ratio) are different at the three freezing low temperatures. A theoretical model is developed to describe the evolutionary features of the dynamic shear modulus (damping ratio) under different conditions. The development of accumulative plastic deformation is strongly sensitive to freeze-thaw cycles and freezing low temperatures. Two-stage evolutionary features for the resilient modulus with a loading cycle number were experimentally verified under different conditions. The freeze-thaw attenuation coefficient was adopted to evaluate the property deterioration with increasing freeze-thaw cycles. The comparison results display good agreement between the experimental data and the predicted curve determined from this proposed theoretical model. This investigation provides a useful and important reference for assessing the degeneration of engineering properties for frozen subgrade soil exposed to freeze-thaw cycles.
关键词	LOADING EXPERIMENTAL-EVIDENCE MECHANICAL-PROPERTIES SATURATED CLAY SHEAR MODULUS DAMPING RATIO BEHAVIOR STRAIN EVOLUTION LEVEL
英文关键词	Subgrade material; Dynamic response; Freeze-thaw cycles
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Geological ; Geosciences, Multidisciplinary
WOS记录号	WOS:000712630900003
来源期刊	SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
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/253855
作者单位	[Zhou, Zhiwei; Li, Guoyu; Shen, Mingde; Wang, Qingzhi] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Zhou, Zhiwei; Li, Guoyu; Shen, Mingde; Wang, Qingzhi] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Zhiwei,Li, Guoyu,Shen, Mingde,et al. Dynamic responses of frozen subgrade soil exposed to freeze-thaw cycles[J]. 中国科学院西北生态环境资源研究院,2022,152.
APA	Zhou, Zhiwei,Li, Guoyu,Shen, Mingde,&Wang, Qingzhi.(2022).Dynamic responses of frozen subgrade soil exposed to freeze-thaw cycles.SOIL DYNAMICS AND EARTHQUAKE ENGINEERING,152.
MLA	Zhou, Zhiwei,et al."Dynamic responses of frozen subgrade soil exposed to freeze-thaw cycles".SOIL DYNAMICS AND EARTHQUAKE ENGINEERING 152(2022).