向家坝水电站坝基挤压带岩石三轴蠕变试验及非线性黏弹塑性蠕变模型研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (283 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要基于岩石常规三轴蠕变试验成果，研究向家坝水电站坝基挤压破碎带砂岩蠕变力学特性，分析岩石轴向和侧向蠕变规律。在低应力水平下，岩石仅发生衰减蠕变和稳态蠕变，而且稳态蠕变阶段的应变速率为非零常数，蠕变量不可忽视，岩石变形满足Burgers蠕变模型。当应力达到一定水平时，岩石经过衰减蠕变和稳态蠕变之后发生加速蠕变破坏。不同围压下蠕变破坏特征不同，尤其是加速蠕变启动时间的差别较大，据此提出加速蠕变启动元件。通过将加速蠕变启动元件与Burgers模型串联，建立一个新的岩石六元件非线性黏弹塑性蠕变模型，并从理论上对其蠕变力学特性进行讨论。推导三维应力状态下的岩石蠕变本构模型公式，研究蠕变参数辨识方法。通过与试验曲线的比较，显示所建非线性蠕变模型的正确性与合理性。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：水利工程, 常规三轴蠕变试验, 稳态蠕变速率, 加速蠕变启动元件, 非线性黏弹塑性蠕变模型

Abstract：Based on the results of rock triaxial test，the creep mechanical properties of the sandstone from the compressive rupture zone in Xiangjiaba Hydropower Station are investigated，and the laws of axial and lateral creep of rock are also analyzed. In the low stress level，the rock only appears decay creep and steady creep. The steady creep strain rate is non-zero constant，and the creep deformation cannot be ignored. The creep of rock is consistent with Burgers model. When the stress reaches a certain level，the accelerated creep damage of rock occurred after the decay creep and steady creep. The characteristics of rock creep failure under different confining pressures are different，especially the starting time of accelerated creep. According to the feature，the startup component of accelerated creep is proposed. By connecting the startup component and Burgers model in series，a new six-component nonlinear viscoelasto-plastic creep model of rock is constructed. The creep property of the nonlinear model is carried out based on the theoretical analysis. The creep constitutive equation in three- dimensional stress state is deduced. The creep parameter identification method is investigated. The comparison between nonlinear creep model and experimental curve shows that the proposed nonlinear viscoelasto-plastic creep model is available and reasonable.

Key words： hydraulic engineering conventional triaxial creep tests steady creep rate accelerated creep startup component nonlinear viscoelasto-plastic creep model

收稿日期: 2010-07-23

引用本文:

张治亮1，2，徐卫亚1，2，王伟1，2. 向家坝水电站坝基挤压带岩石三轴蠕变试验及非线性黏弹塑性蠕变模型研究[J]. 岩石力学与工程学报, 2011, 30(1): 132-140.
ZHANG Zhiliang1，2，XU Weiya1，2，WANG Wei1，2. STUDY OF TRIAXIAL CREEP TESTS AND ITS NONLINEAR VISCO-ELASTOPLASTIC CREEP MODEL OF ROCK FROM COMPRESSIVE ZONE OF DAM FOUNDATION IN XIANGJIABA HYDROPOWER STATION. , 2011, 30(1): 132-140.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I1/132

[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. The rheology and engineering application of the geotechnical material[M]. Beijing：China Architecture and Building Press，1999.(in Chinese)) " target="_blank">
[4]	ENRICO M，TSUTOMU Y. A non-associated viscoplastic model for the behaviour of granite in triaxial compression[J]. Mechanics of Materials，2001，33(5)：283-293. " target="_blank">
[8]	徐卫亚，杨圣奇，谢守益，等. 绿片岩三轴流变力学特性的研究(II)：模型分析[J]. 岩土力学，2005，26(5)：693-698. (XU Weiya，YANG Shengqi，XIE Shouyi，et al. Investigation on triaxial rheological mechanical properties of greenschist specimen (II)：model analysis[J]. Rock and Soil Mechanics，2005，26(5)：693-698.(in Chinese)) " target="_blank">
[12]	蒋昱州，徐卫亚，王瑞红，等. 岩石非线性蠕变损伤模型研究[J]. 中国矿业大学学报，2009，38(3)：331-335.(JIANG Yuzhou，XU Weiya，WANG Ruihong，et al. Nonlinear creep damage constitutive model of rock[J]. Journal of China University of Mining and Technology，2009，38(3)：331-335.(in Chinese)) " target="_blank">
[14]	潘长良，陈沅江，曹平，等. 岩石蠕变过程的不可逆热力学分析[J]. 中南工业大学学报(自然科学版)，2002，33(5)：441-444.(PAN Changliang，CHEN Yuanjiang，CAO Ping，et al. Analysis of rock creep by means of irreversible thermodynamics[J]. Journal of Central South University of Technology(Natural Science)，2002，33(5)：441-444.(in Chinese)) " target="_blank">
[15]	袁海平，曹平，许万忠，等. 岩石黏弹塑性本构关系及改进的Burgers 蠕变模型[J]. 岩土工程学报，2006，28(6)：796-799. (YUAN Haiping，CAO Ping，XU Wanzhong，et al. Visco- elasto-plastic constitutive relationship of rock and modified Burgers creep model[J]. Chinese Journal of Geotechnical Engineering，2006，28(6)：796-799.(in Chinese))
[16]	沈振中，徐志英. 三峡大坝地基花岗岩蠕变试验研究[J]. 河海大学学报(自然科学版)，1997，25(2)：1-7.(SHEN Zhenzhong，XU Zhiying. Creep test of granite for the Three Gorges dam foundation[J]. Journal of Hohai University(Natural Science)，1997，25(2)：1-7.(in Chinese)) " target="_blank">
[2]	王芝银，艾传志，唐明明. 不同应力状态下岩石蠕变全过程[J]. 煤炭学报，2009，34(2)：169-174.(WANG Zhiyin，AI Chuanzhi，TANG Mingming. Complete process of rock creep in different stress states[J]. Journal of China Coal Society，2009，34(2)：169-174.(in Chinese))
[3]	张忠亭，罗居剑. 分级加载下岩石蠕变特性研究[J]. 岩石力学与工程学报，2004，23(2)：218-222.(ZHANG Zhongting，LUO Jujian. Study on creep properties of rock under step load[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(2)：218-222.(in Chinese))
[5]	SHAO J F，ZHU Q Z，SU K. Modeling of creep in rock materials in terms of material degradation[J]. Computers and Geotechnics，2003，30(7)：549-555.
[6]	王维忠，尹光志，赵洪宝，等. 含瓦斯煤岩三轴蠕变特性及本构关系[J]. 重庆大学学报，2009，32(2)：197-201.(WANG Weizhong，YIN Guangzhi，ZHAO Hongbao，et al. Triaxial creep characteristics and constitutive relation of gas-containing coal[J]. Journal of Chongqing University，2009，32(2)：197-201.(in Chinese))
[7]	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))
[9]	任中俊，彭向和，万玲，等. 三轴加载下盐岩蠕变损伤特性的研究[J]. 应用力学学报，2008，25(2)：212-218.(REN Zhongjun，PENG Xianghe，WAN Ling，et al. Thermomechanically consistent constitutive model for rock salt creep[J]. Chinese Journal of Applied Mechanics，2008，25(2)：212-218.(in Chinese)) " target="_blank">
[10]	徐卫亚，杨圣奇，褚卫江. 岩石非线性黏弹塑性流变模型(河海模型)及其应用[J]. 岩石力学与工程学报，2006，25(3)：433-447.(XU Weiya，YANG Shengqi，CHU Weijiang. Nonlinear viscoelasto-plastic rheological model(Hohai model) of rock and its engineering application[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(3)：433-447.(in Chinese))
[11]	佘成学. 岩石非线性黏弹塑性蠕变模型研究[J]. 岩石力学与工程学报，2009，28(10)：2 006-2 011.(SHE Chengxue. Research on nonlinear viscoelasto-plastic creep model of rock[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(10)：2 006-2 011.(in Chinese)) " target="_blank">
[13]	王来贵，何峰，刘向峰，等. 岩石试件非线性蠕变模型及其稳定性分析[J]. 岩石力学与工程学报，2004，23(10)：1 640-1 642. (WANG Laigui，HE Feng，LIU Xiangfeng，et al. Nonlinear creep model and stability analysis of rock[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(10)：1 640-1 642.(in Chinese)) " target="_blank">