摘要
采用分岔理论作为局部化判断条件,提出通过弹粘塑性软化模型来捕捉水工结构中的应变局部化剪切带的有限元简化算法。方法的特点是在每个时步,可以得到作为分岔理论所必须的弹塑性矩阵,仅用其作局部化判断,而不影响程序本身的粘塑性迭代。与其他方法相比,该方法理论简洁,易于程序的实现。通过对边坡的稳定分析,结果表明:该方法是合理可行的。
This paper presents a simplified finite element method using viscoplastic strain softening mode is to capture the strain localization points in hydraulic structures, in which the bifurcation theory is adopted as the condition of onset of strain localization. The trait of this method is that the continuum elastoplastic tangent modulus needed in the bifurcation theory is just used in the judgment of localization in every time step, and has no effect on the process of viscoplasticity return mapping algorithm proposed. Compared with other methods, this model is not only based on simple theory, but also is easy to program. And numerical results show that this method is reasonable and feasible through the analysis of slope stability.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2005年第5期799-802,共4页
Rock and Soil Mechanics
基金
国家自然科学基金项目资助(No.50379039)。
关键词
应变局部化
水工结构
有限元法
应变软化
简化算法
Bifurcation (mathematics)
Elastoplasticity
Finite element method
Slope stability
Strain
Viscoelasticity
