| 温度周期作用下大理岩三轴蠕变试验与理论模型研究 |
| |
| 引用本文： | 梁玉雷,冯夏庭,周辉,房敬年.温度周期作用下大理岩三轴蠕变试验与理论模型研究[J].岩土力学,2010,31(10):3107-3112. |
| |
| 作者姓名： | 梁玉雷 冯夏庭 周辉 房敬年 |
| |
| 作者单位： | 中国科学院武汉岩土力学研究所,岩土力学与工程国家重点试验室,武汉,430071 |
| |
| 基金项目： | 国家自然科学基金面上项目，岩土力学与工程国家重点实验室开放基金，国家重点基础研究发展规划 |
| |
| 摘 要： | 为了解温度周期作用对大理岩蠕变力学特性的影响,采用温度-应力-渗流耦合的岩石力学三轴流变试验系统对大理岩进行了不同温度及温度周期变化下三轴压缩蠕变试验。基于试验结果,研究了大理岩试样在不同温度及温度周期变化下轴向应变随时间的变化规律,分析了不同温度及温度周期变化下蠕变的变形机制,掌握了温度对大理岩三轴蠕变影响的基本规律,并且建立了考虑温度及温度周期变化影响的改进的Burgers模型。理论值与试验结果非常接近,表明考虑温度及温度周期变化的改进Burgers模型适合描述大理岩的黏弹性蠕变特征。为长期暴露于外部环境下的岩质边坡的长期稳定性分析提供了重要的参考依据。
|
| 关 键 词： | 岩石力学 大理岩 温度周期变化 三轴蠕变试验 本构关系 改进的Burgers模型 |
| 收稿时间： | 2009-03-26 |
Research on triaxial creep experiment and theoretical model of marble under cyclic temperatures |
| |
| LIANG Yu-lei,FENG Xia-ting,ZHOU Hui,FANG Jing-nian.Research on triaxial creep experiment and theoretical model of marble under cyclic temperatures[J].Rock and Soil Mechanics,2010,31(10):3107-3112. |
| |
| Authors: | LIANG Yu-lei FENG Xia-ting ZHOU Hui FANG Jing-nian |
| |
| Institution: | State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy Sciences, Wuhan 430071, China |
| |
| Abstract: | In order to study the effect of cyclic temperatures on creep properties of marble, triaxial compression creep experiments of marble specimens were carried out by using rock servo-controlling rheology testing machine, which can consider coupled thermo-hydro-mechanical processes. In the experiments, different temperatures and cyclic temperatures were considered. Based on the experimental results, the axial strain variation pattern of marble with time under different temperatures and cyclic temperatures was investigated. Based on the knowledge of the triaxial creep properties of marble specimen under different temperatures, a modified Burgers model was developed with consideration of temperature change and cyclic temperatures. The results obtained from this model are very consistent with the experiments. It is concluded that the developed modified Burgers model is suitable to describe the viscoelastic creep behavior of marble, which brings important support for the analysis of long-term stability of rock slope under long-term exposures. |
| |
| Keywords: | rock mechanics marble cyclic temperatures triaxial creep experiment constitutive relation modified Burgers model |
| 本文献已被 CNKI 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 |
|
