Abstract：<![CDATA[Abstract: Based on the theories of the continuum damage mechanics and the methods for transversely isotropic damage variables, the damage properties of remolded frozen clay are systematically analyzed under different temperatures, moisture contents and confining pressures by using the conventional triaxial shear tests. The research results show that: (1) the damage evolution behaviors of the remolded frozen clay under different test conditions are consistent, that is, the early stage has rapid growth and the later stage has gentle change and the maximum interaxial damage variable D1max generally ranges from 0.6 to 0.8; (2) the freezing temperature has obvious effect on the damage properties of the remolded frozen clay, and lowering the temperature may strengthen the structure obviously so as to reduce its structural damage and to delay its damage evolution; and (3) the secant modulus can well represent the development characteristics of cracks and the damage evolution behaviors of the remolded frozen clay during the loading procedure, and the relationship between the axial strain and the secant modulus of the damage threshold and temperature rises linearly, the damage strain threshold ]]><![CDATA[ generally ranges from 0.3% to 0.7% and the corresponding secant moduli generally range from 200 MPa to 550 MPa.]]>
[1] 崔托维奇 H A. 冻土力学[M]. 张长庆, 朱元林, 译. 北京: 科学出版社, 1985. (TSYTOVICH H A. Mechanics of frozen soil[M]. ZHANG Chang-qing, ZHU Yuan-lin, translators. Beijing: Science Press, 1983. (in Chinese)) [2] ZHU Y, CARBEE D L. Uniaxial compression strength of frozen silt under constant deformation rates[J]. Cold Region Science and Technology. 1984, 9: 3-15. [3] 李兆霞. 损伤力学的理论与应用[M]. 北京: 科学出版社, 2002. (LI Zhao-xia. Theories and application of damage mechanics[M]. Beijing: Science Press, 2002. (in Chinese)) [4] 吴鸿遥. 损伤力学[M]. 北京: 国防工业出版社, 1990. (WU Hong-yao. Damage mechanics[M]. Beijing: National Defense and Industry Press, 1990. (in Chinese)) [5] KRAJCINOVIC D, FONSEKA G U. The continuous damage theory of brittle materials[J]. Journal of Applied Mechanics, ASME, 1981, 48: 809-815 [6] CHABOCHE J L. Continuum damage mechanics: part I—general concepts[J]. Journal of Applied Mechanics, 1988, 55: 59-64. [7] 维亚洛夫C C. 土力学流变原理[M]. 杜余培, 译. 北京: 科学出版社, 1987. (VIALOV C C. Rheological theroy of soil mechanica[M]. DU Yu-pei, tran. Beijing: Science Press, 1987. (in Chinese)) [8] 何 平, 程国栋, 朱元林. 冻土黏弹塑损伤耦合本构理论[J]. 中国科学D辑, 1999, 29(增刊1): 34-39. (HE Ping, CHENG Guo-dong, ZHU Yuan-lin. Permafrost viscoelastic-damage coupled plastic constitutive theory[J]. Science in China (Series D), 1999, 29(S1): 34-39. (in Chinese)) [9] 郑剑锋, 马 巍, 赵淑萍, 等. 三轴压缩条件下基于CT实时监测的冻结兰州黄土细观损伤变化研究[J]. 冰川冻土, 2011, 33(4): 839-845. (ZHENG Jian-feng, MA Wei, ZHAO Shu-ping, et al. Study of meso-damage changes of frozen Lanzhou loess under triaxial compression based on CT real-time monitoring[J]. Journal of Glaciology and Geocryology, 2011, 33(4): 839-845. (in Chinese)) [10] 赵淑萍, 马 巍, 郑剑锋, 等. 基于CT单向压缩试验的冻结重塑兰州黄土损伤耗散势研究[J]. 岩土工程学报, 2012, 34(11): 2019-2025. (ZHAO Shu-ping, MA Wei, ZHENG Jian-feng, et al. Damage dissipation potential of frozen remolded Lanzhou loess based on CT uniaxial compression test results[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(11): 2019-2025. (in Chinese)) [11] 张树光, 张向东, 易 富. 单轴压缩条件下冻土的动态损伤和分形演化规律[J]. 岩土力学, 2003, 24(增刊): 185-187. (ZHANG Shu-guang, ZHANG Xiang-dong, YI Fu. A timely damage and fractal evolution rule of uniaxial compression for frozen soil[J]. Rock and Soil Mechanics, 2003, 24(S): 185-187. (in Chinese)) [12] 金 龙, 赖远明, 高志华, 等. 冻结砂土的损伤试验研究[J]. 冰川冻土, 2008, 30(2): 306-312. (JIN Long, LAI Yuan-ming, GAO Zhi-hua, et al. Experimental study of the damage of frozen sandy soil[J]. Journal of Glaciology and Geocryology, 2008, 30(2): 306-312. (in Chinese)) [13] LAI Y M, JIN L, CHANG X X. Yield criterion and elasto-plastic damage constitutive model for frozen sandy soil[J]. International Journal of Plasticity, 2009, 25(6): 1177-1205. [14] 孙星亮, 汪 稔, 胡明鉴. 冻土弹塑性各向异性损伤模型及其损伤分析[J]. 岩石力学与工程学报, 2005, 24(19): 3517-3521. (SUN Xing-liang, WANG Ren, HU Ming-jian. An elasto-plastic anisotropic damage model for frozen soil and its damage analysis[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(19): 3517-3521. (in Chinese)) [15] LEMAITRE J, CHABOCHE J L. Mechanics of solid materials[M]. London: Cambridge University Press, 1990. 159-168. [16] 卡恰诺夫 L M. 连续介质损伤力学引论[M]. 杜善义, 王殿富, 译. 哈尔滨: 哈尔滨工业大学出版社, 1989: 43-47. (KACHANOV L M. An introduction to damage mechanics of continuous media[M]. DU Shan-yi, WANG Dian-fu, trans. Harbin: Harbin Institute of Technology Press, 1989: 43-47. (in Chinese))
