Numerical analysis of the mechanical properties of rock materials under tiered and multi-level cyclic load regimes

doi:10.1016/j.soildyn.2020.106186

	Numerical analysis of the mechanical properties of rock materials under tiered and multi-level cyclic load regimes
	Zhou, Yongqiang 3; Sheng, Qian 2,3; Li, Nana 1; Fu, Xiaodong 3
刊名	SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
	2020-08-01
卷号	135 页码:11
关键词	Dynamic constitutive model Rock materials Tiered and multi-level cyclic loading Single-level cyclic loading Mechanical properties
ISSN号	0267-7261
DOI	10.1016/j.soildyn.2020.106186
英文摘要	In engineering practice, it is a common that rocks are subjected to cyclic loading. The mechanical properties of rock materials under tiered, single-level, and multi-level cyclic load regimes (i.e., with different frequency, minimum stress, and amplitude) were numerically investigated by using a dynamic constitutive model for rock materials. A comparison between these loads from the aspects of stress-strain curve, modulus, damage, and strength was undertaken. The results indicate that the model can effectively reflect the different mechanical properties of rock materials under different cyclic load regimes. Under the action of tiered and multi-level cyclic loading, the area and width of the hysteresis loops become larger with increasing applied stress, but the slope of stress-strain curve, area and width of the hysteresis loops, maximum strain, and the irreversible deformation vary under different loads. The loading deformation modulus decreases with the increase of applied stress and the reductions therein are different when subjected to tiered, single-level, and multi-level cyclic loading. With increasing applied stress, the damage evolution in rock specimens subjected to tiered cyclic loading present an increasing trend and the trend likes an approximately inverted "s"-shape. Under multi-level cyclic loading, the damage variables increase rapidly at the first level, then become relatively stable and increase slowly as the applied stress increases. Furthermore, the peak strength of rock differs under different load regimes, and results indicate that cyclic loading has both strengthening and damaging effects on rock strength.
资助项目	National Natural Science Foundation of China[51809258] ; National Natural Science Foundation of China[51679232] ; National Natural Science Foundation of China[51779250] ; International Partnership Program of Chinese Academy of Sciences[131551KYSB20180042]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000540376000009
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24343]
专题	中科院武汉岩土力学所
通讯作者	Zhou, Yongqiang
作者单位	1.Chinese Acad Sci, Wuhan Lib, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 3.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	Zhou, Yongqiang,Sheng, Qian,Li, Nana,et al. Numerical analysis of the mechanical properties of rock materials under tiered and multi-level cyclic load regimes[J]. SOIL DYNAMICS AND EARTHQUAKE ENGINEERING,2020,135:11.
APA	Zhou, Yongqiang,Sheng, Qian,Li, Nana,&Fu, Xiaodong.(2020).Numerical analysis of the mechanical properties of rock materials under tiered and multi-level cyclic load regimes.SOIL DYNAMICS AND EARTHQUAKE ENGINEERING,135,11.
MLA	Zhou, Yongqiang,et al."Numerical analysis of the mechanical properties of rock materials under tiered and multi-level cyclic load regimes".SOIL DYNAMICS AND EARTHQUAKE ENGINEERING 135(2020):11.