| 考虑温度损伤的盐岩蠕变本构关系研究 |
| |
| 引用本文： | 胡其志,冯夏庭,周辉.考虑温度损伤的盐岩蠕变本构关系研究[J].岩土力学,2009,30(8):2245-2248. |
| |
| 作者姓名： | 胡其志 冯夏庭 周辉 |
| |
| 作者单位： | 1. 中国科学院武汉岩土力学研究所,岩土力学和工程国家重点实验室,武汉,430071;湖北工业大学,土木工程与建筑学院,武汉,430068
2. 中国科学院武汉岩土力学研究所,岩土力学和工程国家重点实验室,武汉,430071 |
| |
| 摘 要： | 根据统计力学原理,以分形岩石力学为桥梁,对盐岩在温度与应力耦合作用下蠕变特性进行了研究,导出了考虑围压效应的损伤变量表达式.综合前人的成果,推导出温度-应力耦合下的盐岩损伤方程.对盐岩在温度与三轴应力共同作用下的蠕变试验数据进行研究,分析了盐岩蠕变过程中衰减蠕变阶段、稳态蠕变阶段和加速蠕变阶段的各自特征.对于广义Bingham 蠕变模型在衰减和稳态蠕变阶段引入一非线性函数,在加速蠕变阶段引入损伤,建立了盐岩考虑温度损伤的蠕变本构关系.利用盐岩的三轴蠕变试验数据对新的蠕变损伤模型参数进行辩识与比较分析.结果表明,该模型能够很好地反映在不同温度作用下盐岩的衰减蠕变阶段、稳态蠕变阶段和加速蠕变阶段的规律,验证了该模型的合理性和正确性.
|
| 关 键 词： | 岩石力学 蠕变试验 温度损伤 本构关系 |
| 收稿时间： | 2008-12-10 |
Study of creep model of rock salt with thermal damage considered |
| |
| HU Qi-zhi,FENG Xia-ting,ZHOU Hui.Study of creep model of rock salt with thermal damage considered[J].Rock and Soil Mechanics,2009,30(8):2245-2248. |
| |
| Authors: | HU Qi-zhi FENG Xia-ting ZHOU Hui |
| |
| Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. College of Civil Engineering, Hubei University of Technology, Wuhan 430068, China |
| |
| Abstract: | Creep properties of rock salt under the coupled thermo-mechanical effect are studied using the statistical mechanics and fractal rock mechanics. A damage variant is proposed under the confining stress, and the damage equation under the coupled thermo-mechanical effect is deduced based on previous studies. Based on the test data under the coupled thermo-mechanical effect, main creep features are analyzed on the transient creep stage, steady creep stage and accelerating creep stage. And then a new creep model with thermal damage considered is set up by introducing a nonlinear function to Bingham’s creep model for the transient and steady creep stages and introducing damage for the accelerating creep stage. Finally, the new model is used to analyzed the triaxial creep stages of rock salt; and the results are of good accordance with the test data. |
| |
| Keywords: | rock mechanics creep test thermal damage constitutive model |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
