| 含水状态下软岩蠕变试验及损伤模型研究 |
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| 引用本文： | 杨秀荣,姜谙男,江宗斌.含水状态下软岩蠕变试验及损伤模型研究[J].岩土力学,2018,39(Z1):167-174. |
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| 作者姓名： | 杨秀荣 姜谙男 江宗斌 |
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| 作者单位： | 大连海事大学 道路与桥梁工程研究所，辽宁 大连 116026 |
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| 基金项目： | 国家自然科学基金项目（No. 51678101）；中央高校基本科研业务费专项资金（No. 3132014326）。 |
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| 摘 要： | 为考虑时效劣化和含水弱化对岩石蠕变参数的劣化效应，提出了蠕变损伤模型，即对西原模型进行参数修正与完善，开展了不同含水状态的软岩三轴蠕变试验。首先，对不同含水率的岩石蠕变规律进行了对比分析，初步揭示了含水状态对岩石蠕变过程影响规律的机理。其次，为了能够较好地描述岩石蠕变过程，引入时效劣化效应和含水弱化效应，并通过试验数据拟合了损伤变量和蠕变参数。最后，将模型的计算值与试验值进行对比分析。结果表明，岩石随着含水率的增大，初始蠕变值和稳态蠕变值有所增大。通过FLAC3D验证了该模型的数值计算值与试验值具有很好的吻合性，提出的岩石时效蠕变损伤模型将为岩石流变特性的研究提供一定的理论基础。
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| 关 键 词： | 蠕变试验 损伤 改进西原模型 时效劣化 FLAC3D Kelvin模型 软岩 黏滞系数 |
| 收稿时间： | 2017-12-25 |
Creep test and damage model of soft rock under water containing condition |
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| YANG Xiu-rong,JIANG An-nan,JIANG Zong-bin.Creep test and damage model of soft rock under water containing condition[J].Rock and Soil Mechanics,2018,39(Z1):167-174. |
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| Authors: | YANG Xiu-rong JIANG An-nan JIANG Zong-bin |
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| Institution: | Institute of Road and Bridge Engineering, Dalian Maritime University, Dalian, Liaoning 116026, China |
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| Abstract: | In order to consider the damage effect of aging deterioration and water content weakened on the creep parameters of rock, a creep damage model is proposed, that is, the parameter correction and improvement of Nishihara model and the triaxial creep tests of basalt with different water contents are carried out. First of all, the creep regularities of rocks with different water contents are comparatively analyzed; and the mechanism of the influence of water content on the rock creep process is revealed. Secondly, in order to describe the rock creep process better, the aging deterioration effect and water content weakened effect are introduced. The damage variables and creep parameters are fitted by the experimental data. Finally, the calculated values of the model are compared with the experimental data. The results show that the initial creep value and steady creep value increase with the increase of water content. Furthermore, it is verified that the numerical calculation of the model agreed well with the experimental data by FLAC3D. The rock aging creep damage model proposed in this paper will provide a theoretical basis for the study of rock rheological properties. |
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| Keywords: | creep test damage modified Nishihara model aging deterioration FLAC3D Kelvin model soft rock viscosity coefficient |
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