A Mogi-Type True Triaxial Testing Apparatus for Rocks With Two Moveable Frames in Horizontal Layout for Providing Orthogonal Loads

doi:10.1520/GTJ20160242

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	A Mogi-Type True Triaxial Testing Apparatus for Rocks With Two Moveable Frames in Horizontal Layout for Providing Orthogonal Loads
	Bing, B.; Shi, L.; Li, X.; Wang, A.; Zeng, Z.; He, H.
刊名	GEOTECHNICAL TESTING JOURNAL
	2017
卷号	40 期号:4 页码:542-558
关键词	intermediate principal stress true triaxial apparatus moveable frames in horizontal layout end effect post-failure behavior permeability evolution
ISSN号	0149-6115
DOI	10.1520/GTJ20160242
英文摘要	The Mogi-type true triaxial apparatus (TTA) for rocks provides numerous advantages in terms of complexity, loading capacity, permeability measurement, and cost. However, the spring support design limits the improvements to the loading capacity and stiffness of the vertical frame, which are essential in acquiring the complete stress-strain behavior of relatively large specimens. In this paper, a new TTA achieved by modifying the original Mogi-type design with two moveable frames in a horizontal layout is developed. In addition to the design of stiffer frames with low moving resistance, such a modification provides convenience for experimental operation. Moreover, a positioning device built in the triaxial vessel enables the accurate placing of the specimen. Technical details, including off-center loading, end friction effect, and strain measurement are carefully examined. Calibration and repeatability tests show that the apparatus is stable and reliable. The apparatus is used to conduct tests to examine the influence of intermediate principal stress on the mechanical behaviors of marble. The results demonstrate that, in addition to strength, some other characteristics, including brittleness, fracture angle, volumetric modulus, and stress at the onset of dilatancy of marble also increase initially, but subsequently decrease with an increase of intermediate principal stress. The measurement of the permeability of mudstone during compression reveals that the increase in permeability is closely related to the dilatancy of the mudstone.
WOS研究方向	Engineering ; Geology
语种	英语
出版者	AMER SOC TESTING MATERIALS
WOS记录号	WOS:000405961800015
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4093]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech
推荐引用方式 GB/T 7714	Bing, B.,Shi, L.,Li, X.,et al. A Mogi-Type True Triaxial Testing Apparatus for Rocks With Two Moveable Frames in Horizontal Layout for Providing Orthogonal Loads[J]. GEOTECHNICAL TESTING JOURNAL,2017,40(4):542-558.
APA	Bing, B.,Shi, L.,Li, X.,Wang, A.,Zeng, Z.,&He, H..(2017).A Mogi-Type True Triaxial Testing Apparatus for Rocks With Two Moveable Frames in Horizontal Layout for Providing Orthogonal Loads.GEOTECHNICAL TESTING JOURNAL,40(4),542-558.
MLA	Bing, B.,et al."A Mogi-Type True Triaxial Testing Apparatus for Rocks With Two Moveable Frames in Horizontal Layout for Providing Orthogonal Loads".GEOTECHNICAL TESTING JOURNAL 40.4(2017):542-558.