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砂岩蠕变特性及蠕变力学模型研究 预览 被引量:40

Study on creep behaviour of sandstone and its mechanical models
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摘要 应力水平对岩石蠕变特性有很大的影响.通过对砂岩单轴蠕变试验研究表明:当加载应力远小于屈服应力时,应变速率持续衰减最终保持恒定,只产生蠕变的第1,2阶段,试件不会破坏,属于稳定型蠕变;当加载应力大于或小于但接近于屈服应力时,应变速率先衰减后加速增长,蠕变的3个阶段都产生了,在蠕变第3阶段产生了轴向方向的3条裂纹,最终裂纹扩展贯通而破坏,破坏形式为张性拉裂破坏,属于非稳定型蠕变.实验说明,屈服应力是岩石产生极非稳定型蠕变的一个临界值.根据加载应力水平产生的蠕变差异,建立了砂岩的经验本构模型和蠕变力学模型,为岩体工程建设提供借鉴与参考. Creep of rock could be influenced by a few factors and the stress states had great influence on the rheological characters of soft rock. The uniaxial compressive creep test on sand stone showed that, when the stress was considerably less than yield stress, the decreasing strain rate approached to a final steady value. In this case the creep was named stable creep and only got to the phase 1 and 2 without damage. On the other hand, when the stress was close to the yield stress, the strain rate decreased at the beginning, then accelerated to increase. Crack appeared and spread in the 3ra phase of the creeping process. The destructing pattern is tensive crack, which belonged to unsteady creeping. It was shown that yield stress was a critical value to cause unsteady creeping. An emperical constitutive model and the creep stress model were established according to the differences of creep induced by the stress level.
作者 姜永东 鲜学福 熊德国 周富春 JIANG Yong-dong, XIAN Xue-fu, XIONG De-guo, ZHOU Fu-chun (1. The Key Laboratory of the Exploitation of Southwest Resources & the Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400030, China; 2. Chongqing Jiaotong University, Chongqing 40074, China)
机构地区 重庆大学 重庆大学
出处 《岩土工程学报》 EI CAS CSCD 北大核心 2005年第12期 1478-1481,共4页 Chinese Journal of Geotechnical Engineering
基金 中国科学院资助项目,重庆市院士基金
关键词 蠕变 屈服应力 临界值 经验模型 蠕变模型 creep yield stress critical value emperical model rheological model
作者简介 姜永东(1977-),男,贵州风冈县人,博士研究生,重庆大学教师,主要从事岩石力学与工程方面的研究.
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  • 1陈宗基,石泽全.用8000KN多功能三轴仪测量脆性岩石的扩容,蠕变及松驰[J].岩石力学与工程学报,1989,8(2):97-117. 被引量:20
  • 2曹树刚.煤岩的蠕变损伤、瓦斯渗流和煤与瓦斯突出关系的研究(博士学位论文)[M].重庆:重庆大学,2000.. 被引量:1
  • 3刘高.高地应力区结构性流变围岩稳定性研究[J].岩石力学与工程学报,2002,21(3):417-491. 被引量:1
  • 4Lama R D, Vutukuri V S. Handbook on Mechanical Properties of Rocks, .Testing Techniques and Results, Volume Ⅲ[M]. Clausthal,Germany: Trans. Tech. Publications, 1978. 被引量:1
  • 5Adachi T, Takase A. Prediction of long term strength of soft sedimentary rock[A]. In: Proc. of Int. Symp. on Weak Rock[C]. [s. l.]:[s.n.], 1981, 1: 93-98. 被引量:1
  • 6Hayano K, Matsmoto M. Study of triaxial creep testing method and model for creep deformation on sedimentary soft rocks[A]. In:Proc. of the 29th Symp. of Rock Mech.[C]. [s. l.]: [s. n.], 1999, 8-14. 被引量:1
  • 7Perzyna P. The constitutive equations for work-hardening and rate sensitive plastic materials[J]. Proc. Vibrational Problems, 1973, 4(3):281-290. 被引量:1
  • 8Akai K, Adachi T, Nishi K. Time dependent characteristics and constitutive equations of soft sedimentary rock(porous tuff)[J]. Journal of Geotechnical Engineering, 1979, (282): 75-87. 被引量:1
  • 9Matsumoto M, Tatsuoka E Study of rheological modeling of creep behavior for sedimentary soft rock[A]. In: Proc. of the 51th Annual Conference of the Japan Society of Civil Engineers[C]. [s. l,]: [s. n.],1996, 660-661. 被引量:1
  • 10Ito T, Hashimoto K, Akagi T. Methods to predict the time of creep failure[A]. In: Proc. of 30th Symp. of Rock Mech.[C]. [s. l.]: [s. n.],2000, 368-372. 被引量:1

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