水文地质工程地质2013，Vol.40Issue(2)：56-62,7.
循环荷载下原状结构红粘土累积塑性应变模型
Accumulated plastic strain models of red clay in original structure under cyclic loading
摘要
Abstract
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.关键词
累积塑性应变/数学模型/动应力比/循环荷载/原状结构红粘土Key words
accumulative plastic strain/ mathematical models/ dynamic stress ratio/ cyclic load/ red clay in original structure分类
建筑与水利引用本文复制引用
刘晓红,方薇,杨果林..循环荷载下原状结构红粘土累积塑性应变模型[J].水文地质工程地质,2013,40(2):56-62,7.基金项目
国家自然科学基金资助项目(50778180) （50778180）
湖南省教育厅科研项目(11C0619) （11C0619）
