| 土石混合体REV尺度数值方法研究 |
| |
| 引用本文： | 狄圣杰,汪明元,邓南沙,宋庆滔.土石混合体REV尺度数值方法研究[J].地震学刊,2012(5):523-527. |
| |
| 作者姓名： | 狄圣杰 汪明元 邓南沙 宋庆滔 |
| |
| 作者单位： | [1]中国水电顾问集团华东勘测设计研究院,杭州310014 [2]国家知识产权局专利审查协作北京中心,北京100088 |
| |
| 基金项目： | 国家自然科学基金; 法国国家科研署联合基金（50911130366）资助 |
| |
| 摘 要： | 土石混合体是一类较为复杂的宏观二元介质不连续岩土体,不同的块体分布情况及不同的试件尺度导致其具有不同的等效强度特性。基于随机集合体构造（RA S）方法构建了土石混合体的随机模型,编制程序实现了随机模型的输出和数值模型的生成。以西南某大型堆积体滑坡中的典型土石混合体为例,考虑含石量和不同粒径分布规律,建立多组不同尺寸随机模型,进行了大量的数值试验,得到了强度表征单元体积（REV）尺度,在此基础上得到了等效强度参数,并分析了土石混合体受力性能和渐进破坏模式。研究结果表明,土石混合体存在REV尺度,案例所得的REV尺度为1.0 m×1.0 m,不同尺度数值计算结果有一定差别,基于REV尺度的力学参数才符合工程意义。
|
| 关 键 词： | 土石混合体 随机模型 表征单元体积（REV） 数值试验 |
Numerical Simulation Study on REV＇s Measure of Soil-rock Mixture |
| |
| DI Sheng-jie,WANG Ming-yuan,DENG Nan-sha,SONG Qing-tao.Numerical Simulation Study on REV＇s Measure of Soil-rock Mixture[J].Journal of Seismology,2012(5):523-527. |
| |
| Authors: | DI Sheng-jie WANG Ming-yuan DENG Nan-sha SONG Qing-tao |
| |
| Institution: | 1. East China Investigation and Design Institute, China Hydropower Engineering Group Co. , Hangzhou 310014, China 2. Patent Examination Cooperation Center of The Patent Office, Sipo, Beijing 100088, China) |
| |
| Abstract: | Soil-rock mixture is a kind of inhomogeneous material with macro geo-binary medium. It has different equivalent strength properties with different inner block distribution and different scale. Random model of soil-rock mixture was established by using the method of random aggregate structure （RAS）. The output of random model and formation of numerical model were carried out by compiling program. For an example, take the huge landslide of deposit body in the southwest China, it contains the typical soil- rock mixture. Random model with different scales was established after considering the factors of stone content and particle distribution; and a lot of numerical tests was carried out. We got its representative element volume （REV） scale of the mechanics property. By this step, the equivalent strength parameters was obtained; and its mechanical behavior and gradual damage modes were analyzed. It is shown that the soil-rock mixture has the REV scale and the REV scale in case is 1.0 m ×1.0 m; based on this, the ob- tained mechanical parameters are useful. |
| |
| Keywords: | soil-rock mixture random model representative element volume（REV） numerical test |
| 本文献已被 维普 等数据库收录！ |
|
