Creep behavior is one of the important mechanical properties of rock material, and is closely related with the long-term stability and safety of rock engineering. To investigate the creep characteristics of Carbonaceous slate, uniaxial creep tests under different stress levels were carried out on RLW-1000 rheology testing machine. The creep test result was analyzed by using generalized Kelvin model, Burgers model and FC (function component) assembly model. The results showed that FC model had good fitting results in low stress level, while in high stress level, Burgers model had better fitting results than the other two models. In general, Burgers model could effectively reflect the creep characteristics of carbonaceous slate in all stress levels. Moreover, parameter fitting results in different stress levels indicated that the viscous coefficient increased along with the time development in low stress level, and significantly reduced with time in high load stress, which presented as the function of time and stress-level. The research results can offer model parameters and design basis for further understanding the creep properties of carbonaceous slates.
Key words
creep test /
generalized Kelvin model /
Burgers model /
FC assembly model /
parameter fitting
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References
[1] 孙 钧. 岩土材料流变及其工程应用[M] .北京:中国建筑工业出版社,1999.(SUN Jun. Rheology of Geomaterials and Its Engineering Application[M] . Beijing: China Architecture and Building Press, 1999.(in Chinese)
[2] 孙 钧. 岩石流变力学及其工程应用研究的若干进展[J] . 岩石力学与工程学报,2007,26(6):1081-1106.(SUN Jun. Rock Rheological Mechanics and Its Advance in Engineering Applications[J] . Chinese Journal of Rock Mechanics and Engineering, 2007, 26(6): 1081-1106.(in Chinese)
[3] YANG Chun-he, DAEMENA J J K, YIN Jian-hua. Experimental Investigation of Creep Behavior of Salt Rock[J] . International Journal of Rock Mechanics and Mining Sciences, 1999, 36(2): 233-242.
[4] 徐卫亚,杨圣奇,杨松林,等.绿片岩三轴流变力学特性的研究(Ⅰ):试验结果[J] .岩土力学,2005,26(4):531-537.(XU Wei-ya, YANG Sheng-qi, YANG Song-lin, et al. Investigation on Triaxial Rheological Mechanical Properties of Greenschists Specimen(Ⅰ): Experimental Results[J] . Rock and Soil Mechanics, 2005, 26(4): 531-537.(in Chinese)
[5] 徐 平,夏熙伦.三峡工程花岗岩蠕变特性试验研究[J] .岩土工程学报,1996,18(4):63-67.(XU Ping, XIA Xi-lun. Experimental Study on the Creep Behavior of Granite for Three Gorges Project[J] . Chinese Journal of Geotechnical Engineering, 1996, 18(4): 63-67.(in Chinese)
[6] 齐明山,徐正良,崔 勤,等.风华破碎类花岗岩三轴流变试验研究[J] .地下空间与工程学报,2007,3(5):914-917.(QI Ming-shan, XU Zheng-liang, CUI Qin, et al. Study on Rotten and Cracked Granite by Triaxial Rheological Experiment[J] . Chinese Journal of Underground Space and Engineering, 2007, 3(5): 914-917.(in Chinese)
[7] 张 明,毕忠伟,杨 强,等. 锦屏一级水电站大理岩蠕变试验与流变模型选择[J] . 岩石力学与工程学报,2010, 29(8):1530-1537.(ZHANG Ming,BI Zhong-wei,YANG Qiang,et al. Creep Test and Rheological Model Selection of Marble of Jinping Hydropower Station[J] . Chinese Journal of Rock Mechanics and Engineering,2010,29(8):1530-1537.(in Chinese)
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