Hardening-Softening Constitutive Model of Hard Brittle Rocks Considering Dilatant Effects and Safety Evaluation Index

doi:10.1007/s10338-019-00108-4

	Hardening-Softening Constitutive Model of Hard Brittle Rocks Considering Dilatant Effects and Safety Evaluation Index
	Huang, Shuling 3; Zhang, Chuanqing 1,2; Ding, Xiuli 3
刊名	ACTA MECHANICA SOLIDA SINICA
	2020-02-01
卷号	33 期号:1 页码:121-140
关键词	Hard brittle rock Constitutive model Safety evaluation index Dilatant effect Strength criterion
ISSN号	0894-9166
DOI	10.1007/s10338-019-00108-4
英文摘要	The damage and even failure of hard brittle rocks has been the most important challenge facing the safety of construction of deep engineering works, so the key to solving this problem is the recognition of the strength characteristics and description of the mechanical behavior of hard brittle rocks. Therefore, in view of this problem, in this study, we first analyzed the strength and mechanical response characteristics revealed in tests of, and site excavation in, hard brittle rocks. Second, by analyzing rock-strength envelopes on meridional and deviatoric planes, the generalized polyaxial strain energy (GPSE) strength criterion was applied. This allows description of the effects of the minimum principal stress, intermediate principal stress, hydrostatic pressure, and Lode's angle of stress on the strength of hard rocks. By establishing evolutionary relationships of strength parameters and dilation parameters with plastic volumetric strain in rock failure, we established an elasto-plastic mechanical constitutive model for hard brittle rocks based on the GPSE criterion. In addition, through use of the failure approach index theory and the dilatancy safety factor, an evaluation index for degree of damage considering dilatant effects of rocks was proposed. Finally, the constitutive model established in this study and the proposed evaluation index were integrated into the numerical simulation method to simulate triaxial tests on rocks and numerical simulation of deformation and fracture of the rocks surrounding the deep-buried auxiliary tunnels in China's Jinping II Hydropower Station. In this way, the reasonableness of the model and the index was verified. The strength theory and the constitutive model established in this research are applicable to the analysis of high-stress deformation and fracture of hard brittle rock masses, which supports the theoretical work related to deep engineering operations.
WOS研究方向	Materials Science ; Mechanics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000511695600008
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/23482]
专题	中科院武汉岩土力学所
通讯作者	Zhang, Chuanqing
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China 3.Yangtze River Sci Res Inst, Key Lab Geotech Mech & Engn, Minist Water Resources, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Huang, Shuling,Zhang, Chuanqing,Ding, Xiuli. Hardening-Softening Constitutive Model of Hard Brittle Rocks Considering Dilatant Effects and Safety Evaluation Index[J]. ACTA MECHANICA SOLIDA SINICA,2020,33(1):121-140.
APA	Huang, Shuling,Zhang, Chuanqing,&Ding, Xiuli.(2020).Hardening-Softening Constitutive Model of Hard Brittle Rocks Considering Dilatant Effects and Safety Evaluation Index.ACTA MECHANICA SOLIDA SINICA,33(1),121-140.
MLA	Huang, Shuling,et al."Hardening-Softening Constitutive Model of Hard Brittle Rocks Considering Dilatant Effects and Safety Evaluation Index".ACTA MECHANICA SOLIDA SINICA 33.1(2020):121-140.