恒定法向刚度条件下三维粗糙裂隙面剪切力学特性

doi:10.13722/j.cnki.jrme.2020.0259

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Abstract The effects of initial normal stress(0.02–8 MPa) and roughness coefficient JRC(12–18) on shear stress，normal displacement，normal stress and shear wear characteristics of fracture surfaces were investigated. The results show that，during the whole shear process，the normal displacement-normal stress fitting relationships of fracture surfaces present a group of parallel lines，with a constant normal stiffness boundary of 10.8 GPa/m. With increasing initial normal stress and JRC，the normal stress of fracture surfaces presents an increase，and the initial peak shear stress respectively increases by 6.201–9.974 times and 22.70%–55.76%. The normal displacement of fracture surfaces declines as the initial normal stress increases，while the dilatancy deformation tends to be intensified with increasing JRC due to gradually significant “climbing effects” along the asperities of the fracture surfaces. The peak surface resistance index decreases with increasing the initial normal stress，while increases by 10.82%–36.46% with increasing JRC. As JRC increases，the strength envelope of the initial peak shear stress becomes steeper. At the shear wear stage，the normal stress-shear stress paths can be will described using a linear function，and the fitting curves tend to be gentle as the initial normal stress increases. The binaryzation calculation results after shear tests indicate that，with increasing the initial normal stress and JRC，the ratio of the shear area on the fracture surfaces increases by 1.032–1.799 times and 8.63%–71.81%，respectively. The shear wear characteristics tend to be significant.

Key words： rock mechanics constant normal stiffness fracture surface roughness coefficient normal stress binaryzation

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	Articles by authors
	YIN Qian1
	2
	JING Hongwen1
	MENG Bo1
	LIU Richeng1
	WU Yingjie1

Cite this article:

YIN Qian1,2,JING Hongwen1, et al. Shear mechanical properties of 3D rough rock fracture surfaces under constant normal stiffness conditions[J]. , 2020, 39(11): 2213-2225.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0259 OR https://rockmech.whrsm.ac.cn/EN/Y2020/V39/I11/2213

[1] MENG F Z，WONG L Y N，ZHOU H，et al. Comparative study on dynamic shear behavior and failure mechanism of two types of granite joint[J]. Engineering Geology，2018，245：356–369.
[2] 曹平，龙龙，范文臣，等. 基于起伏形态特征的节理岩石峰值剪切强度准则[J]. 中南大学学报：自然科学版，2017，48(4)：1 081–1 087.(CAO Ping，LONG Long，FAN Wenchen，et al. Peak shear strength criterion for rock joints based on undulating characteristics[J]. Journal of Central South University：Science and Technology，2017，48(4)：1 081–1 087.(in Chinese))
[3] TANG Z C，WONG L N Y. New criterion for evaluating the peak shear strength of rock joints under different contact states[J]. Rock Mechanics and Rock Engineering，2016，49(4)：1 191–1 199.
[4] 崔国建，张传庆，韩华超，等. CNL及CNS条件下结构面剪切特性试验研究[J]. 岩石力学与工程学报，2019，38(增2)：3 384–3 392. (CUI Guojian，ZHANG Chuanqing，HAN Huachao，et al. Experiment study on shear behavior of artificial joint under CNL and CNS boundary conditions[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(Supp.2)：3 384–3 392.(in Chinese))
[5] BAHAADDINI M. Effect of boundary condition on the shear behaviour of rock joints in the direct shear test[J]. Rock Mechanics and Rock Engineering，2017，50(5)：1 141–1 155.
[6] 周辉，程广坦，朱勇，等. 大理岩规则齿形结构面剪切特性试验研究[J]. 岩土力学，2019，40(3)：852–860.(ZHOU Hui，CHENG Guangtan，ZHU Yong，et al. Experimental study of shear deformation characteristics of marble dentate joints[J]. Rock and Soil Mechanics，2019，40(3)：852–860.(in Chinese))
[7] 许江，瞿佳美，刘义鑫，等. 循环剪切荷载作用下充填物对结构面剪切特性影响试验研究[J]. 岩土力学，2019，40(5)：1 627–1 637.(XU Jiang，QU Jiamei，LIU Yixin，et al. Influence of filling material on the behavior of joints under cyclic shear loading[J]. Rock and Soil Mechanics，2019，40(5)：1 627–1 637.(in Chinese))
[8] 张雅慧，汪丁建，唐辉明，等. 基于PFC2D数值试验的异性结构面剪切强度特性研究[J]. 岩土力学，2016，37(4)：1 031–1 041. (ZHANG Yahui，WANG Dingjian，TANG Huiming，et al. Study of shear strength characteristics of heterogeneous discontinuities using PFC2D simulation[J]. Rock and Soil Mechanics，2016，37(4)：1 031–1 041. (in Chinese))
[9] LEE Y K，PARK J W，SONG J J. Model for the shear behavior of rock joints under CNL and CNS conditions[J]. International Journal of Rock Mechanics and Mining Sciences，2014，70：252–263.
[10] LI Y C，WU W，LI B. An analytical model for two?order asperity degradation of rock joints under constant normal stiffness conditions[J]. Rock Mechanics and Rock Engineering，2018，51(5)：1 431–1 445.
[11] HAN G，JING H，JIANG Y，et al. Effect of cyclic loading on the shear behaviours of both unfilled and infilled rough rock joints under constant normal stiffness conditions[J]. Rock Mechanics and Rock Engineering，2020，53(1)：31–57.
[12] YIN Q，LIU R C，JING H W，et al. Experimental study of nonlinear flow behaviors through fractured rock samples after high-temperature exposure[J]. Rock Mechanics and Rock Engineering，2019，52(9)：2 963–2 983.
[13] ISRM. Rock characterization，testing and monitoring-ISRM suggested methods. In：Brown ET(Ed) Suggested methods for the quantitative description of discontinuities in rock masses[M]. Pergamon：Oxford University Press，1981：3–52.
[14] HUANG N，LIU R，JIANG Y，et al. E?ects of fracture surface roughness and shear displacement on geometrical and hydraulic properties of three-dimensional crossed rock fracture models[J]. Advances in Water Resources，2018，113：30–41.
[15] RONG G，YANG J，CHENG L，et al. Laboratory investigation of nonlinear flow characteristics in rough fractures during shear process[J]. Journal of Hydrology，2016，541：1 385–1 394.
[16] XIA C，QIAN X，LIN P，et al. Experimental investigation of nonlinear flow characteristics of real rock joints under different contact conditions[J]. Journal of Hydraulic Engineering，2017，143(3)：1–14.
[17] BARTON N，CHOUBEY V. The shear strength of rock joints in theory and practice[J]. Rock Mechanics Felsmechanik Mecanique Des Roches，1977，10(1/2)：1–54.
[18] LIU R C，LOU S，LI X J，et al. Anisotropic surface roughness and shear behaviors of rough-walled plaster joints under constant normal load and constant normal stiffness conditions[J]. Journal of Rock Mechanics and Geotechnical Engineering，2020，12：338–352.
[19] MENG B，JING H W，YANG S Q，et al. Experimental study on shear behavior of bolted cement mortar blocks under constant normal stiffness[J]. KSCE Journal of Civil Engineering，2019，23(8)：3 724– 3 734.
[20] JIANG Y J，XIAO J，TANABASHI Y，et al. Development of an automated servo-controlled direct shear apparatus applying a constant normal stiffness condition[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(2)：275–286.
[21] THIRUKUMARAN S，INDRARATNA B. A review of shear strength models for rock joints subjected to constant normal stiffness[J]. Journal of Rock Mechanics and Geotechnical Engineering，2016，(8)：405–414.
[22] 肖维民，夏才初，邓荣贵. 岩石节理应力–渗流耦合试验系统研究进展[J]. 岩石力学与工程学报，2014，33(增2)：3 456–3 465. (XIAO Weimin，XIA Caichu，DENG Ronggui. Advances in development of coupled stress-flow test system for rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(Supp.2)：3 456–3 465.(in Chinese))
[23] JOHNSTON I W，LAM T S K，WILLIAMS A F. Constant normal stiffness direct shear testing for socketed pile design in weak rock[J]. Geotechnique，1987，37(B1)：83–87.
[24] MURALHA J，GRASSELLI G，TATONE B，et al. ISRM suggested method for laboratory determination of the shear strength of rock joints：revised version[J]. Rock Mechanics and Rock Engineering，2014，47(1)：291–302.
[25] INDRARATNA B，HAQUE A，AZIZ N. Laboratory modelling of shear behaviour of soft joints under constant normal stiffness conditions[J]. Geotechnical and Geological Engineering，1998，16：17–44.