基于单剪试验的邓肯E-B模型参数确定  

Determination of Ducan E-B Model Parameters Based on Simple Shear Tests

作　　者：孔维耀[1] 陆扬 刘斯宏[3] 黄明坤[3] 谢浩[3] 

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092 [2]上海市水利工程设计研究院有限公司,上海200061 [3]河海大学水利水电学院,江苏南京210098

出　　处：《水电能源科学》2015年第2期140-143,共4页Water Resources and Power

基　　金：国家自然科学基金项目(51179059)

摘　　要：土石坝应力应变有限元计算中常采用邓肯E-B模型,模型参数大多通过三轴试验确定,但操作相对比较复杂,为此提出一种通过单剪试验确定邓肯E-B模型参数的方法,即对某一级配粗粒料进行单剪试验,将试验得到的单剪条件下的应力应变关系通过转换公式得到三轴条件下的应力应变关系,据此整理得到的邓肯E-B模型参数与三轴试验结果基本一致,并用该参数对单剪试验进行有限元数值模拟,得到的应力应变关系与试验结果较为吻合。Duncun E-B model is commonly used in finite element analysis of stress and strain fields of embankment dam.The parameters required in this model are typically obtained through triaxial tests.In this study,simple shear test is presented to determine such parameters.Simple shear test is carried out on a coarse-grained material with certain particle size distribution and then the obtained stress-strain relationship is transferred to that in triaxial test conditions.It is found out that the E-B model parameters obtained by this way are basically consistent with those determined by triaxial tests.Finally,those parameters are used to the finite element analysis of simple shear tests and the stress-strain behavior is quite similar to test results.

关 键 词：粗粒料 单剪试验 E-B模型 数值模拟 

分 类 号：TU411.7[建筑科学—岩土工程]