Accumulated Plastic Strain Models of Red Clay in Original Structure under Cyclic Loading
详细信息
- 责任者：Liu Xiaohong (Department of Construction & Engineering ; Hunan Institute of Science and Technology ; Yueyang 414000 ; China) ; Fang Wei
- 刊名：Hydrogeology and Engineering Geology
- 出版年：2013
- 卷期：40(2)
- 关键词：循环加载 ; cyclic loading ; 红粘土 ; red clay
- 页码：p.56-62
- 图表：illus., 4 tables, 15 refs.
- 分类号：1702
- issnNo：ISSN1000-3665
- isbnNo：CN11-2202/P
摘要
Based on the εp-lgN test curves of red clay in original structure under cyclic loading,the classical models are applied in fitting analysis for logarithmic function to stable type curve and Monismith exponential function to destructive type curve.The fitting formulas of each model parameter is obtained,and the conclusion is drawn that divergent logarithmic function model is not suitable for the stable type curve.In view of the convergence of the stable type curve,a new mathematical model of accumulative plastic strain for the stability curves is proposed.Compared with the divergent logarithmic function model,the new model is of convergence and can better simulate the change regularity of the stable type curve.By utilizing the new model to fit the stable type curves of red clay in original structure under different experimental conditions,fitting formulas of the new model parameters are obtained.Based on the critical dynamic stress test values of red clay in original structure,a new parameter called "dynamic stress ratio" is introduced,which can reduce the discreteness of test data points.