气候变化领域集成服务门户(CCPortal): Experimental investigation on dynamic characteristics of sandy gravel in frozen region

CCPortal

DOI	10.1016/j.coldregions.2021.103251
	Experimental investigation on dynamic characteristics of sandy gravel in frozen region
	Li, Fada; Su, Lei; Wan, Hua-Ping; Niu, Fujun; Ling, Xianzhang
通讯作者	Su, L ; Ling, XZ (通讯作者)，Qingdao Univ Technol, Sch Civil Engn, Qingdao, Peoples R China.
发表日期	2021
ISSN	0165-232X
EISSN	1872-7441
卷号	185
英文摘要	In this study, a series of low-normal temperature triaxial tests and Computed Tomography scan (CT scan) tests are carried out to study the dynamic characteristics and micro-structural changes of sandy gravel in frozen region. The dynamic properties of sandy gravel at different temperatures and confining pressures are systematically discussed under the moisture content of 5.9% and frequency of 1 Hz through experimental tests combining with CT scan images. The variation of backbone curve, dynamic shear modulus and damping ratio under various mass ratios is explored. The average of CT numbers and standard deviation obtained from CT scan images of sandy gravel are evaluated. Meanwhile, internal structure and damage evolution process for sandy gravel are analyzed. The results derived from this study reveal that (i) the shear strength of specimen decreases with the temperature increase; (ii) within a certain dynamic shear strain interval, the dynamic shear modulus increases correspondingly with the growth of confining pressure; (iii) with the increase of mass ratio, the dynamic shear stress of specimen gradually decrease, and the dynamic shear modulus with high mass ratio is lower than that with low mass ratio.
关键词	FREEZE-THAW MECHANICAL-PROPERTIES SHEAR MODULUS DAMPING RATIO CONSTITUTIVE MODEL BEHAVIOR CLAY TEMPERATURES STABILITY CYCLES
英文关键词	Sandy gravel; Dynamic shear stress; Damping ratio; Dynamic shear modulus; Dynamic triaxial tests; Computed Tomography scan
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS记录号	WOS:000632043400001
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
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/254401
作者单位	[Li, Fada; Su, Lei; Ling, Xianzhang] Qingdao Univ Technol, Sch Civil Engn, Qingdao, Peoples R China; [Wan, Hua-Ping] Zhejiang Univ, Coll Civil Engn & Architecture, Hangzhou, Peoples R China; [Niu, Fujun] Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Li, Fada,Su, Lei,Wan, Hua-Ping,et al. Experimental investigation on dynamic characteristics of sandy gravel in frozen region[J]. 中国科学院西北生态环境资源研究院,2021,185.
APA	Li, Fada,Su, Lei,Wan, Hua-Ping,Niu, Fujun,&Ling, Xianzhang.(2021).Experimental investigation on dynamic characteristics of sandy gravel in frozen region.COLD REGIONS SCIENCE AND TECHNOLOGY,185.
MLA	Li, Fada,et al."Experimental investigation on dynamic characteristics of sandy gravel in frozen region".COLD REGIONS SCIENCE AND TECHNOLOGY 185(2021).