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| 基于数值实验的节理岩体变形特性尺寸效应 | |
| 引用本文： | 安民,张红亮,尹小涛. 基于数值实验的节理岩体变形特性尺寸效应[J]. 武汉大学学报(工学版), 2008, 41(2): 73-77 |
| 作者姓名： | 安民 张红亮 尹小涛 |
| 作者单位： | 1. 水利部山西水利水电勘测设计研究院,山西,太原,030024 2. 中交第一航务工程勘察设计院有限公司,天津,300222 3. 中国科学院,武汉岩土力学研究所,湖北,武汉,430071 |
| 摘 要： | 借用有限元数值实验技术,通过节理随机概率模型生成0.4、0.6、0.8、1.0 m和1.1 m等5组不同尺寸的节理岩体试件,每个尺寸组10个试件.在5 MPa围压下,对试件轴向分级加载,获得同一尺寸下每个试件的应力-应变曲线,分析每组10条应力应变曲线及数据随试件尺寸的变化规律.分析结果发现:尺寸较小时,同组变形曲线比较分散,数据离散程度相对较大;随着尺寸的增大,曲线束积聚程度提高,数据离散性减小,这说明试件受力变形特性存在尺寸效应,可以获得该方法获取岩体变形特性的特征尺寸. |
| 关 键 词： | 节理岩体 尺寸效应 REV 应力应变曲线 |
| 文章编号： | 1671-8844(2008)02-0073-05 |
| 修稿时间： | 2007-10-18 |
Scale effect on deformation characteristics of jointed rock mass based on numerical test |
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| AN Min,ZHANG Hongliang,YIN Xiaotao. Scale effect on deformation characteristics of jointed rock mass based on numerical test[J]. Engineering Journal of Wuhan University, 2008, 41(2): 73-77 | |
| Authors: | AN Min ZHANG Hongliang YIN Xiaotao |
| Abstract: | Five groups of jointed rock mass's specimens with different dimensions of 0.4,0.6,0.8,1.0 m and 1.1 m are produced by random probabilistic model of joint,using numerical test technique of finite element method.Each scale group contains 10 specimens under same random probabilistic parameters condition.Then,stress-strain curve of each specimen with same scale is simulated on condition that the static water pressure is 5 MPa and that the axial pressure is operated step by step.Furthermore,these 10 pieces curve of each group and their data vibrating with the dimension of specimen are analyzed.It is found that the curves in same scale group is scattering when sample dimension is small,and that curves change convergence with the increase of specimen scale.These illustrate there exists scale effect on jointed rock mass.Finally,the characteristics scale of rock mass strain feature can be obtained by this method. |
| Keywords: | jointed rock mass scale effect REV stress-strain curve |
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