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| EXPERIMENTAL STUDY OF CREEP AND ELASTIC AFTEREFFECT OF SANDSTONE |
| JIANG Yuzhou1，WANG Ruihong2，ZHU Jiebing1，ZENG Ping1 |
| (1. Key Laboratory for Geotechnical Mechanics and Engineering of Ministry of Water Resources，Yangtze River Scientific Research Institute，Wuhan，Hubei 430010，China；2. Key Laboratory of Geological Hazards on Three Gorges Reservoir Area，Ministry of Education，China Three Gorges University，Yichang，Hubei 443002，China) |
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Abstract Triaxial creep and elastic aftereffect tests to the sandstone specimens from the Three Gorges reservoir area were carried out with the creep testing machine of rock. The creep and elastic aftereffect deformation curves under different pressures were acquired. The rock specimens exhibited the time-dependent deformation characteristics. The creep curves had the typical three stages of rock creep. The magnitude and the rate of the time-dependent deformations gradually increased with the increasing of the pressure. The creep and the irreversible deformation were similar. The creep model of Burgers and the constitutive equation of the elastic aftereffect under the three-dimensional stress state were deduced. The parameters of the triaxial creep and elastic aftereffect models were obtained from the test data calculated with an optimized algorithm. The time-dependent parameters were nonlinearly reduced gradually with the increase of the stress levels. When the sandstone was in the stage of creep，the parameter of viscosity reflected the steady state of creep deformation of rock specimen. When the sandstone was in the stage of aftereffect，the parameter of viscosity described the variation of irreversible deformation after creeping.
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| [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，1999：1–5.(SUN Jun. Rheological behavior of geomaterials and its engineering applications[M]. Beijing：China Architecture and Building Press，1999：1–5.(in Chinese))
[2] 孙 钧. 岩石蠕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)：1 081–1 106.(SUN Jun. Rock creep mechanics and its advance in engineering applications[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(6)：1 081– 1 106.(in Chinese))
[3] 刘 雄. 岩石流变学概论[M]. 北京：地质出版社，1994：1–3.(LIU Xiong. The conspectus of rock rheology[M]. Beijing：Geological Publishing House，1994：1–3.(in Chinese))
[4] 夏才初，闫子舰，王晓东，等. 大理岩卸荷条件下弹黏塑性本构关系研究[J]. 岩石力学与工程学报，2009，28(3)：459–466.(XIA Caichu，YAN Zijian，WANG Xiaodong，et al. Research on elasto- viscopastic constitutive relation of marble under unloading condition[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(3)：459–466.(in Chinese))
[5] LI J L，WANG L H，WANG X X，et al. Research on unloading nonlinear mechanical characteristics of jointed rock masses[J]. Journal of Rock Mechanics and Geotechnical Engineering，2010，2(4)：357–364.
[6] 朱杰兵，汪 斌，邬爱清. 锦屏水电站绿砂岩三轴卸荷流变试验及非线性损伤蠕变本构模型研究[J]. 岩石力学与工程学报，2010，29(3)：528–534.(ZHU Jiebing，WANG Bin，WU Aiqing. Study of unloading triaxial rheological tests and its nonlinear damage constitutive model of Jinping hydropower station green sandstone[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(3)：528–534.(in Chinese))
[7] 曹 平，郑欣平，李 娜，等. 深部斜长角闪岩流变试验及模型研究[J]. 岩石力学与工程学报，2012，31(增1)：3 015–3 021.(CAO Ping，ZHENG Xinping，LI Na，et al. Experiment and model study of rheological characteristics for deep amphibolite[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(Supp.1)：3 015–3 021. (in Chinese))
[8] 杨文东，张强勇，陈 芳，等. 不同应力路径下卸围压流变试验分析及模型辨识[J]. 中南大学学报：自然科学版，2012，43(5)：1 885– 1 893.(YANG Wendong，ZHANG Qiangyong，CHEN Fang，et al. Analysis of unloading confining pressure rheological tests in different stress paths and model identification[J]. Journal of Central South University：Science and Technology，2012，43(5)：1 885–1 893.(in Chinese))
[9] 佘成学，崔 旋. 岩石非线性蠕变模型研究[J]. 武汉大学学报：工学版，2009，42(1)：25–28.(SHE Chengxue，CUI Xuan. Research on nonlinear creep model of rock[J]. Engineering Journal of Wuhan University，2009，42(1)：25–28.(in Chinese))
[10] 蒋昱州，张明鸣，李良权. 岩石非线性黏弹塑性蠕变模型研究及其参数识别[J]. 岩石力学与工程学报，2008，27(4)：832–839.(JIANG Yuzhou，ZHANG Mingming，LI Liangquan. Study on nonlinear visco- elastoplastic creep model of rock and parameter identification[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(4)：832–839.(in Chinese))
[11] 徐 平，杨挺清，徐春敏，等. 三峡船闸高边坡岩体时效特性及长期稳定性分析[J]. 岩石力学与工程学报，2002，21(2)：163–168.(XU Ping，YANG Tingqing，XU Chunmin，et al. Creep characteristics and long-term stability of rock mass in ship lock high slope of the Three Gorges Project[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(2)：163–168.(in Chinese))
[12] 丁秀丽，付 敬，刘 建，等. 软硬互层边坡岩体的蠕变特性研究及稳定性分析[J]. 岩石力学与工程学报，2005，24(19)：3 410– 3 418.(DING Xiuli，FU Jing，LIU Jian，et al. Study on creep behavior of alternatively distributed soft and hard rock layers and slope stability analysis[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(19)：3 410–3 418.(in Chinese)) |
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2015, Vol. 34 
