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DOI	10.1177/10567895211019067
	A creep model of pile-frozen soil interface considering damage effect and ice effect
	Gao, Qiang; Wen, Zhi; Zhou, Zhiwei; Brouchkov, Anatoli; Wang, Dayan; Shi, Rui
通讯作者	Wen, Z (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	2020
ISSN	1056-7895
EISSN	1530-7921
英文摘要	An important source of time-dependent pile deformation is creep behavior at pile-frozen soil interface in permafrost regions. A creep model for pile-frozen soil/ice interfaces was proposed based on a series of multistage creep tests. The test results show that the creep behavior of the pile-frozen soil/ice interfaces is easily observed at a steady rate larger than 0 even at a small load level, which increases as the increase of load level. The elastic shear modulus increases at a slowing down rate with the increase of load level. The interfaces are mainly strengthened during the creep process until the occurrence of the accelerating creep, which is more obvious for frozen soil. A large amount of ice in frozen soil can enhance the creep rate and reduce the carrying capacity of pile foundation. The viscosity eta(2) reflecting steady creep rate, the instantaneous shear modulus G(0), and the critical stress tau(S) required for describing damage behaviors distribute in the form of Bigaussian asymmetric peak function with ice content. The Burger model considering ice effect and damage effect is feasible to describe the entire creep behavior of the interfaces. Sensitivity analysis reveals that ice content in frozen soil has a marked influence on pile deformation, a cooling method can probably adjust the creep deformation of pile in frozen soil with high ice content.
关键词	LOAD TESTS PERMAFROST FOUNDATIONS
英文关键词	Pile-frozen soil interface; creep model; strengthening effect; damage; viscosity; ice content
语种	英语
WOS研究方向	Materials Science ; Mechanics
WOS类目	Materials Science, Multidisciplinary ; Mechanics
WOS记录号	WOS:000677308900001
来源期刊	INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
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/254583
作者单位	[Gao, Qiang; Wen, Zhi; Zhou, Zhiwei; Wang, Dayan; Shi, Rui] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Lanzhou, Peoples R China; [Gao, Qiang; Wen, Zhi; Zhou, Zhiwei; Shi, Rui] Univ Chinese Acad Sci, Beijing, Peoples R China; [Gao, Qiang; Brouchkov, Anatoli] Lomonosov Moscow State Univ, Moscow, Russia; [Wen, Zhi] Lanzhou Jiao Tong Univ, Sch Civil Engn, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Gao, Qiang,Wen, Zhi,Zhou, Zhiwei,et al. A creep model of pile-frozen soil interface considering damage effect and ice effect[J]. 中国科学院西北生态环境资源研究院,2020.
APA	Gao, Qiang,Wen, Zhi,Zhou, Zhiwei,Brouchkov, Anatoli,Wang, Dayan,&Shi, Rui.(2020).A creep model of pile-frozen soil interface considering damage effect and ice effect.INTERNATIONAL JOURNAL OF DAMAGE MECHANICS.
MLA	Gao, Qiang,et al."A creep model of pile-frozen soil interface considering damage effect and ice effect".INTERNATIONAL JOURNAL OF DAMAGE MECHANICS (2020).