Post-liquefaction shearing behaviour of saturated gravelly soils: Experimental study and discrete element simulation

doi:10.1016/j.jrmge.2020.01.007

	Post-liquefaction shearing behaviour of saturated gravelly soils: Experimental study and discrete element simulation
	Wang, Yong 2; Wang, Yanli 1; Kong, Lingwei 2; Sun, Zhiliang 2
刊名	JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
	2020-10-01
卷号	12 期号:5 页码:1119-1130
关键词	Post-liquefaction Micro-mechanism Gravelly soil Deformation Discrete element method (DEM)
ISSN号	1674-7755
DOI	10.1016/j.jrmge.2020.01.007
英文摘要	To investigate the post-liquefaction shearing behaviour of saturated gravelly soil, laboratory tests were conducted using a static-dynamic multi-purpose triaxial apparatus. In addition, numerical simulations using the discrete element method (DEM) were performed to preliminarily understand the micro-mechanism of gravelly soil in monotonic loading after liquefaction. The influences of dry density, initial confining stress and degree of liquefaction on the post-liquefaction shearing behaviour of gravelly soil were discussed, and the evolution of the micro-parameters of the granular system was also analysed. The results show that the stress-strain responses of gravelly soil after liquefaction can be divided into three stages: (1) low strength stage, (2) super-linear strength recovery stage, and (3) sublinear strength recovery stage, which are distinctly different from those of the general saturated gravelly soil without previous cyclic loading. The initial state and prior dynamic stress history have significant influences on the post-liquefaction shearing behaviour of gravelly soil. The DEM simulation revealed that the average coordination number sharply increases, the contact normal shows an obvious orientation distribution, and the destroyed force chain backbones are reconstructed in the monotonic reloading process after liquefaction. The evolution of the micro-parameters of the granular system clearly reflects the interior interaction process and micro-mechanisms in the particles during the three different stages of the macro-mechanical behaviour of gravelly soil. (C) 2020 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V.
资助项目	National Natural Science Foundation of China[51979269] ; National Natural Science Foundation of China[51779017] ; National Natural Science Foundation of China[41702348]
WOS研究方向	Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000580247200018
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24921]
专题	中科院武汉岩土力学所
通讯作者	Wang, Yong
作者单位	1.Minist Water Resources, Key Lab Geotech Mech & Engn, Yangtze River Sci Res Inst, Wuhan 430010, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yong,Wang, Yanli,Kong, Lingwei,et al. Post-liquefaction shearing behaviour of saturated gravelly soils: Experimental study and discrete element simulation[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2020,12(5):1119-1130.
APA	Wang, Yong,Wang, Yanli,Kong, Lingwei,&Sun, Zhiliang.(2020).Post-liquefaction shearing behaviour of saturated gravelly soils: Experimental study and discrete element simulation.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,12(5),1119-1130.
MLA	Wang, Yong,et al."Post-liquefaction shearing behaviour of saturated gravelly soils: Experimental study and discrete element simulation".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 12.5(2020):1119-1130.