(1. Department of Geotechnical Engineering，College of Civil Engineering，Tongji University，Shanghai 200092，China；2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education，Tongji University，Shanghai 200092，China；3. Shandong Zhongjian Urban Development Co.，Ltd.，Jinan，Shandong 250014，China；
4. Shanghai Chengtou Group Co.，Ltd.，Shanghai 200020，China)
Abstract：The natural occurrence of numerous discontinuities in rock masses makes them prone to significant displacements and friction degradation under external dynamic forces，thereby increasing the risk of instability. To investigate the mechanical properties of jointed rock masses under cyclic dynamic conditions，this study focuses on natural red sandstone and explores the shear mechanical characteristics of rock discontinuities under cyclic shearing，with a specific emphasis on the dynamic properties of rock masses by setting a high shear rate. The evolution of shear stress and normal displacement during cyclic shearing is analyzed，and a peak shear strength prediction model for structural planes is established，incorporating the number of cyclic shear cycles based on plastic work theory. The results show that：(1) The applied cyclic shear rate (2 mm/s) reaches the dynamic range，and in comparison to quasi-static direct shear tests，this rate more accurately simulates the shear mechanical behavior of discontinuities under dynamic conditions. (2) During cyclic shearing，the number of cycles，type of discontinuities，and normal stress significantly influence the evolution of shear stress on the discontinuities. Normal displacement exhibits distinct patterns at shear displacements of 0 mm and ±5 mm. As the number of cycles increases，normal displacement gradually decreases，indicating a reduction in dilatancy and an increase in compaction. (3) A peak shear strength prediction model that accounts for the number of cyclic shear cycles is established，with an overall error of approximately 10% compared to actual conditions，demonstrating good applicability. The research findings provide theoretical support for the safety and stability assessment of rock engineering under dynamic disturbances.
张清照1，2，佟泽昊1，2，石振明1，2，谢可禄1，2，3，罗泽军1，2，4. 高循环剪切速率条件下岩石结构面动力学特性研究[J]. 岩石力学与工程学报, 2025, 44(5): 1146-1165.
ZHANG Qingzhao1，2，TONG Zehao1，2，SHI Zhenming1，2，XIE Kelu1，2，3，LUO Zejun1，2，4. Study on the dynamic characteristics of rock discontinuities under high cyclic shear rate. , 2025, 44(5): 1146-1165.
[1] ZHOU X P，ZHANG J Z，QIAN Q H，et al. Experimental investigation of progressive cracking processes in granite under uniaxial loading using digital imaging and AE techniques[J]. Journal of Structural Geology，2019，126：129–145.
[2] 瞿佳美. 循环荷载作用下结构面剪切特性试验研究[硕士学位论文][D]. 重庆：重庆大学，2018.(QU Jiamei. Experimental study on shear characteristics of rock joints under cyclic loading[M. S. Thesis][D]. Chongqing：Chongqing University，2018.(in Chinese))
[3] 杨 洁，荣 冠，程 龙，等. 节理峰值抗剪强度试验研究[J]. 岩石力学与工程学报，2015，34(5)：884–894.(YANG Jie，RONG Guan，CHENG Long，et al. Experimental study of peak shear strength of rock joints[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(5)：884–894.(in Chinese))
[4] 孙辅庭，佘成学，万利台，等. 基于三维形貌特征的岩石节理峰值剪切强度准则研究[J]. 岩土工程学报，2014，36(3)：529–536.(SUN Futing，SHE Chengxue，WAN Litai，et al. Peak shear strength criterion for rock joints based on three-dimensional morphology characteristics[J]. Chinese Journal of Geotechnical Engineering，2014，36(3)：529–536.(in Chinese))
[5] 刘 博，李海波，刘亚群. 循环剪切荷载作用下岩石节理变形特性试验研究[J]. 岩土力学，2013，34(9)：2 475–2 481.(LIU Bo，LI Haibo，LIU Yaqun. Experimental study of deformation behavior of rock joints under cyclic shear loading[J]. Rock and Soil Mechanics，2013，34(9)：2 475–2 481.(in Chinese))
[6] 谢 强，宁 越，王晶晶，等. 具有规则粗糙度的类岩石节理剪切力学性质试验研究[J]. 西安建筑科技大学学报：自然科学版，2019，51(5)：635–642.(XIE Qiang，NING Yue，WANG Jingjing，et al. Study on shear mechanical properties of rock-like joints with regular roughness[J]. Journal of Xi?an University of Architecture and Technology：Natural Science，2019，51(5)：635–642.(in Chinese))
[7] 田世轩，郭保华，孙杰豪，等. 不同边界条件下剪切速率对类岩石节理剪切力学特性的影响[J]. 岩土力学，2023，44(2)：541–551. (TIAN Shixuan，GUO Baohua，SUN Jiehao，et al. Effect of shear rate on shear mechanical properties of rock-like joints under different boundary conditions[J]. Rock and Soil Mechanics，2023，44(2)：541–551.(in Chinese))
[8] JAFARI M K，HOSSEINI K A，PELLET F，et al. Evaluation of shear strength of rock joints subjected to cyclic loading[J]. Soil Dynamics and Earthquake Engineering，2003，23(7)：619–630.
[9] 刘 博，李海波，朱小明. 循环剪切荷载作用下岩石节理强度劣化规律试验模拟研究[J]. 岩石力学与工程学报，2011，30(10)：2 033–2 039.(LIU Bo，LI Haibo，ZHU Xiaoming. Experiment simulation study of strength degradation of rock joints under cyclic shear loading[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(10)：2 033–2 039.(in Chinese))
[10] 夏才初，宋英龙，唐志成，等. 反复直剪试验节理强度与粗糙度变化的研究[J]. 中南大学学报：自然科学版，2012，43(9)：3 589–3 594. (XIA Caichu，SONG Yinglong，TANG Zhicheng，et al. Shear strength and morphology characteristic evolution of joint surface under cyclic loads[J]. Journal of Central South University：Science and Technology，2012，43(9)：3 589–3 594.(in Chinese))
[11] 陈占锋，向 娟，范文臣. 循环剪切对岩石节理形貌与力学行为影响实验研究[J]. 中国科技论文，2019，14(2)：221–225.(CHEN Zhanfeng，XIANG Juan，FAN Wenchen. Experimental study on the effects of cyclic shear stress on rock joint surface morphology and shear behavior[J]. China Sciencepaper，2019，14(2)：221–225.(in Chinese))
[12] 张向阳，曹 平，陈 锐，等. 循环剪切对节理面形貌及强度劣化规律的微观力学研究[J]. 有色金属：矿山部分，2019，71(4)：81–87. (ZHANG Xiangyang，CAO Ping，CHEN Rui，et al. Micromechanics research on triaxialtorsional for morphology texture and deterioration law of rock strength[J]. Nonferrous Metals：Mining Section，2019，71(4)：81–87.(in Chinese))
[13] 尹敬涵，盛 谦，陈 健，等. 岩体结构面循环剪切设备和剪切力学特性的研究现状及展望[J]. 防灾减灾工程学报，2024，44(5)： 1 202–1 230.(YIN Jinghan，SHENG Qian，CHEN Jian，et. al. Research status and prospects of cyclic shear apparatus and shear mechanical properties of rock mass structural planes[J]. Journal of Disaster Prevention and Mitigation Engineering，2024，44(5)：1 202–1 230.(in Chinese))
[14] DONG S，ZHANG H，PENG Y，et al. Method of calculating shear strength of rock mass joint surface considering cyclic shear degradation[J]. Scientific Reports，2022，12(1)：9 406.
[15] LI H，DENG J H，YIN J H，et al. An experimental and analytical study of rate-dependent shear behaviour of rough joints[J]. International Journal of Rock Mechanics and Mining Sciences，2021，142：104702.
[16] ZHENG B W，QI S W，HUANG X L，et al. An advanced shear strength criterion for rock discontinuities considering size and low shear rate[J]. Applied Sciences，2020，10(12)：4 095.
[17] GU L L，WANG Z，ZHANG F，et al. Dynamic evolution of shear rate-dependent behavior of rock discontinuity under shearing condition[J]. Journal of Central South University，2021，28(6)：1 875–1 887.
[18] 张雨辰，程 浩. 不同剪切速率下节理面剪切特性分析[J]. 粉煤灰综合用，2021，35(2)：36–42.(ZHANG Yuchen，CHENG Hao. Analysis of shear characteristics of jointed surface under different shear rates[J]. Fly Ash Comprehensive Utilization，2021，35(2)：36–42.(in Chinese))
[19] MIRZAGHORBANALI A，NEMCIK J，AZIZ N. Effects of shear rate on cyclic loading shear behaviour of rock joints under constant normal stiffness conditions[J]. Rock Mechanics and Rock Engineering，2014，47(5)：1 931–1 938.
[20] MENG F，WONG L N Y，ZHOU H，et al. Shear rate effects on the post-peak shear behaviour and acoustic emission characteristics of artificially split granite joints[J]. Rock Mechanics and Rock Engineering，2019，52(7)：2 155–2 174.
[21] 梅志千，周建方，章海远. 莫尔–库伦理论的修正及应用[J]. 上海交通大学学报，2002，(3)：441–444.(MEI Zhiqian，ZHOU Jianfang，ZHANG Haiyuan. The modification and application of Mohr- Coulomb?s theory[J]. Journal of Shanghai Jiaotong University，2002，(3)：441–444.(in Chinese))
[22] 唐志成，黄润秋，张建明，等. 含坡度均方根的节理峰值剪切强度经验公式[J]. 岩土力学，2015，36(12)：3 433–3 438.(TANG Zhicheng，HUANG Runqiu，ZHANG Jianming，et al. Empirical peak shear strength criterion for rock joints based on slope root-mean-square[J]. Rock and Soil Mechanics，2015，36(12)：3 433–3 438.(in Chinese))
[23] HUANG M，CHEN X N，HONG C J，et al. Shear behavior of two-order morphology in rock joints[J]. Journal of Mountain Science，2023，20(3)：845–858.
[24] ZHANG H，DONG S，LU Z C，et al. Shear strength deterioration effect of rock mass joint surface under cyclic shear load[J]. Scientific Reports，2024，12(1)：15 034.
[25] 高丙丽，刘 拴，任建喜，等. 考虑结构面震动劣化效应的岩质边坡块体动力稳定性评价[J]. 土木工程学报，2024，57(1)：97–110. (GAO Bingli，LIU Shuan，REN Jianxi，et al. Dynamic stability evaluation of rock slope blocks considering vibration degradation effect of structural plane[J]. China Civil Engineering Journal，2024，57(1)： 97–110.(in Chinese))
[26] 张 强，谷邱鑫，李 涛，等. 岩石节理双向动态循环剪切试验系统研制与应用[J]. 岩石力学与工程学报，2024，43(8)：1 870–1 882. (ZHANG Qiang，GU Qiuxin，LI Tao，et al. Development and application of bidirectional dynamic cyclic shear test system for rock joints[J]. Chinese Journal of Rock Mechanics and Engineering，2024，43(8)：1 870–1 882.(in Chinese))
[27] 罗泽军，张清照，石振明，等. 考虑表面形貌特征的岩体结构面蠕变特性[J]. 地球科学，2022，47(12)：4 484–4 497.(LUO Zejun，ZHANG Qingzhao，SHI Zhenming，et al. Shear creep characteristics of red sandstone discontinuities considering different morphologies[J]. Earth Science，2022，47(12)：4 484–4 497.(in Chinese))
[28] 梁昌玉，李 晓，李守定，等. 岩石静态和准动态加载应变率的界限值研究[J]. 岩石力学与工程学报，2012，31(6)：1 156–1 161. (LIANG Changyu，LI Xiao，LI Shouding，et al. Study of strain rates threshold value between static loading and quasi-dynamic loading of rock[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(6)：1 156–1 161.(in Chinese))
[29] M CAI，P K KAISER，F SUORINENI，et al. A study on the dynamic behavior of the meuse/haute-marne argillite[J]. Physics and Chemistry of the Earth：Parts A/B/C，2007，32(8)：907–916.
[30] ZHANG M，SHENG Q，CUI Z. Experimental and numerical modeling study of rock joint mechanical properties and failure mechanisms under cyclic shear[C]// IOP Conference Series：Earth and Environmental Science. [S. l.]：IOP Publishing，2021：022073.
[31] HE C，TANG H M，FANG K，et al. New 2D roughness parameters with geometric and physical meanings for rock joints and their correlation with joint roughness coefficient[J]. Frontiers in Earth Science，2024，12：1367778.
[32] TIWARI G，LATHA G M. Shear velocity-based uncertainty quantification for rock joint shear strength[J]. Bulletin of Engineering Geology and the Environment，2019，78(8)：5 937–5 949.
[33] SHRIVASTAVA A K，RAO K S. Shear behaviour of rock joints under CNL and CNS boundary conditions[J]. Geotechnical and Geological Engineering，2015，33(5)：1 205–1 220.
[34] 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))
[35] PATTON F D. Multiple modes of shear failure in rock and related materials[Ph. D. Thesis][D]. Urbana-Champaign：University of Illinois at Urbana-Champaign，1966.
[36] XIA C，TANG Z，XIAO W，et al. New peak hear strength criterion of rock joints based on quantified surface description[J]. Rock Mechanics and Rock Engineering，2014，47(2)：387–400.
[37] GRASSELLI G，WIRTH J，EGGER P. Quantitative three-dimensional description of a rough surface and parameter evolution with shearing[J]. International Journal of Rock Mechanics and Mining Sciences，2002，39(6)：789–800.
[38] BARTON N，CHOUBEY V. The shear strength of rock joints in theory and practice[J]. Rock Mechanics，1977，10(1/2)：1–54.
[39] LEE H S，PARK Y J，CHO T F，et al. Influence of asperity degradation on the mechanical behavior of rough rock joints under cyclic shear loading[J]. International Journal of Rock Mechanics and Mining Sciences，2001，38(7)：967–980.
2025, Vol. 44 
