(1. School of Architecture and Civil Engineering，Xi?an University of Science and Technology，Xi?an，Shaanxi 710054，China；
2. School of Mechanics and Civil Engineering，China University of Mining and Technology(Beijing)，Beijing 100083，China)
Abstract：Saturated fractured rocks in cold regions under cyclic freezing and thawing experience the crack initiation，crack extension，deflection and branching along the crack end，which results in localized damage and fracturing at the crack end and overall failure. The quasi-sandstone samples of similar materials containing a single fracture with the inclination angles of 0°，30°，45°，60°，90°，were prepared. The freezing and thawing cycles of 10，20，30，50 were applied in the experiments respectively. The samples with a single fracture exhibit the localized damage under the cyclic freezing and thawing and the fracture end can be divided into fracture zone，progressive damage zone and systematic damage zone. The localized damage effect becomes weaker and the acoustic wave velocity becomes faster as the increase of the crack dip angle. The bifurcation and deflection of main cracks under cyclic freezing and thawing occur in the samples with a single fracture at the inclination angles of 30°，45° and 60°. The deflection of main crack occurs earlier，the deflection direction tends to be horizontal，and the extended length along the initial fracture direction is shorter as the decrease of the crack tip angle. The localized damages in the upper and lower of crack are different and the macroscopic fracture occurs earlier at the bottom of the crack，and the difference is more notable with the increase of the crack dip angle.
申艳军1，杨更社1，荣腾龙2，贾海梁1，王 铭1，刘 慧1. 冻融循环作用下单裂隙类砂岩局部化损伤效应及端部断裂特性分析[J]. 岩石力学与工程学报, 2017, 36(3): 562-570.
SHEN Yanjun1，YANG Gengshe1，RONG Tenglong2，JIA Hailiang1，WANG Ming1，LIU Hui1. Localized damage effects of quasi-sandstone with single fracture and fracture behaviors of joint end under cyclic freezing and thawing. , 2017, 36(3): 562-570.
[1] 孙广忠. 论“岩体结构控制论”[J]. 工程地质学报，1993，9(1)：14–18.(SUN Guangzhong. On the theory of structure-controlled rock mass[J]. Journal of Engineering Geology，1993，9(1)：14–18. (in Chinese))
[2] MATSUOKA N，MURTON J. Frost Weathering：Recent advances and future directions[J]. Permafrost and Periglacial Process，2008，19(1)：195–210.
[3] 刘泉声，黄诗冰，康永水，等. 裂隙岩体冻融损伤研究进展与思考[J]. 岩石力学与工程学报，2015，34(3)：452–471.(LIU Quansheng，HUANG Shibing，KANG Yongshui，et al. Advance and review on freezing-thawing damage of fractured rock[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(3)：452–471.(in Chinese))
[4] 刘泉声，黄诗冰，康永水，等. 低温冻结岩体单裂隙冻胀力与数值计算研究[J]. 岩土工程学报，2015，37(9)：1 572–1 580.(LIU Quansheng，HUANG Shibing，KANG Yongshui，et al. Numerical and theoretical studies on frost heaving pressure in a single fracture of frozen rock mass under low temperature[J]. Chinese Journal of Geotechnical Engineering，2015，37(9)：1 572–1 580.(in Chinese))
[5] 阎锡东，刘红岩，邢闯锋，等. 基于微裂隙变形与扩展的岩石冻融损伤本构模型研究[J]. 岩土力学，2015，36(12)：3 489–3 499. (YAN Xidong，LIU Hongyan，XING Chuangfeng，et al. Constitutive model research on freezing-thawing damage of rock based on deformation and propagation of micro-cracks[J]. Rock and Soil Mechanics，2015，36(12)：3 489–3 499.(in Chinese))
[6] 刘红岩，刘 冶，邢闯锋，等. 循环冻融条件下节理岩体损伤破坏试验研究[J]. 岩土力学，2014，35(6)：1 547–1 554.(LIU Hongyan，LIU Ye，XING Chuangfeng，et al. Test study of damage failure of jointed rock mass under freezing-thawing cycles[J]. Rock and Soil Mechanics，2014，35(6)：1 547–1 554.(in Chinese))
[7] 李新平，路亚妮，王仰君. 冻融荷载耦合作用下单裂隙岩体损伤模型研究[J]. 岩石力学与工程学报，2013，32(11)：2 307–2 315. (LI Xinping，LU Yani，WANG Yangjun. Research on damage model of single jointed rock masses under coupling action of freeze-thaw and loading[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(11)：2 307–2 315.(in Chinese))
[8] 路亚妮，李新平，肖家双. 单裂隙岩体冻融力学特性试验分析[J].地下空间与工程学报，2014，10(3)：593–598.(LU Yani，LI Xinping，XIAO Jiashuang. Experimental analysis on mechanical characteristic of single cracked rock mass under freeze-thaw condition[J]. Chinese Journal of Underground Space and Engineering，2014，10(3)：593–598.(in Chinese))
[9] 乔国文，王运生，储 飞，等. 冻融风化边坡岩体破坏机制研究[J]. 工程地质学报，2015，23(3)：469–476.(QIAO Guowen，WANG Yunsheng，CHU Fei，et al. Failure mechanism of slope rock mass due to freeze weathering[J]. Journal of Engineering Geology，2015，23(3)：469–476.(in Chinese))
[10] 渠孟飞，谢 强，胡 熠，等. 寒区隧道衬砌冻胀力室内模型试验研究[J]. 岩石力学与工程学报，2015，34(9)：1 894–1 900.(QU Mengfei，XIE Qiang，HU Yi，et al. Model test on frost heaving force of tunnel lining in cold region[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(9)：1 894–1 900.(in Chinese))
[11] 杨海清，周小平，许茂林，等. 裂隙岩体损伤局部化分析[J]. 土木建筑与环境工程，2012，34(1)：54–59.(YANG Haiqing，ZHOU Xiaoping，XU Maolin，et al. Analysis of damage localization in crack weakened rock mass[J]. Journal of Civil，Architectural and Environmental Engineering，2012，34(1)：54–59.(in Chinese))
[12] 张 平，李 宁，贺若兰. 含裂隙类岩石材料的局部化渐进破损模型研究[J]. 岩石力学与工程学报，2006，25(10)：2 043–2 050. (ZHANG Ping，LI Ning，HE Ruolan. Research on localized progressive damage model for fractured rocklike materials[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(10)：2 043–2 050.(in Chinese))
[13] 赵 程，鲍 冲，田加深，等. 基于应变局部化的双裂纹岩样贯通模式及强度试验研究[J]. 岩石力学与工程学报，2015，34(11)：2 309–2 318.(ZHAO Cheng，BAO Chong，TIAN Jiashen，et al. Experimental study of coalescence mode of cracks and strength of rock with double flaws based on strain localization[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(11)：2 309–2 318.(in Chinese))
[14] 杨更社，周春华，田应国，等. 软岩类材料冻融过程水热迁移的实验研究初探[J]. 岩石力学与工程学报，2006，25(9)：1 765–1 770. (YANG Gengshe，ZHOU Chunhua，TIAN Yingguo，et al. Primary experimental study on moisture and heat transfer of soft rock material during freezing and thawing[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(9)：1 765–1 770.(in Chinese))
[15] 李庆芬，朱世范. 断裂力学及其工程应用[M]. 哈尔滨：哈尔滨工程大学出版社，2008：9–13.(LI Qingfeng，ZHU Shifan. Fracture mechanics and its engineering application[J]. Harbin：Harbin Engineering University Press，2008：9–13.(in Chinese))
[16] 李世愚，和泰名，尹祥础，等. 岩石断裂力学导论[M]. 合肥：中国科学技术大学出版社，2010：158–159.(LI Shiyu，HE Taiming，YIN Xiangchu，et al. Introduction of rock fracture mechanics[M]. Hefei：University of Science and Technology of China Press，2010：158–159.(in Chinese))
2017, Vol. 36 
