摘要
广义开尔文流变模型被广泛应用于描述岩质边坡开挖过程中岩体的粘弹性变形分析。由于岩质边坡在开挖过程中岩体的变形是粘弹性和塑性变形综合作用的结果,因此广义开尔文流变模型不能较好地表达岩质边坡在开挖过程中的变形。文章针对岩质边坡在开挖过程中边坡岩体表现出来明显的粘弹塑性变形特征,采用FLAC3D数值软件对符合修正的广义开尔文粘弹塑性本构模型的岩石试件进行单轴压缩数值试验,获得该粘弹塑性本构模型变形参数的基本特性,为岩质边坡开挖岩体粘弹塑性本构模型的选择提供参考。
The generalized Kelvin rheological model has been widely used to describe viscoelastic deformation in rock slope excavation. Because the deformation of rock at the excavation stage is the combined results of viscoelastic deformation and plastic deformation, there are some deficiencies in expressing deformation of a rock slope at the excavation stage with the viscoelastic constitutive model. According to the obvious visco-elasto-plastic deformation characteristics of a rock slope at the excavation stage, the uniaxial compression test was simulated numerically on the rock specimen which accorded with the modified generalized Kelvin visco-elasto-plastic constitutive model by means of FLAC3D. The basic characteristics of deformation parameters were obtained. The results provide references for the selection of the visco-elasto-plastic constitutive model of rock at the rock slope excavation stage.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第10期1469-1472,共4页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目(5083900450909053)
三峡大学博士启动基金资助项目(0620080083)
关键词
岩石
广义开尔文模型
粘弹塑性模型
变形参数
rock
generalized Kelvin model
visco-elasto-plastic constitutive model
deformation parameter
