摘要
利用ABAQUS有限元软件,建立轴对称模型,分析赣南地区的红黏土在不同加载速率及应力路径下的力学响应,并验证数值模型的可行性。结果表明:不同应力路径下红黏土的应力-应变关系曲线、孔压-应变关系曲线变化特征不同,同一应力路径下加载速率的大小不影响整体发展趋势,但决定峰值大小;红黏土对侧向卸荷的敏感性高于轴向加载,高加载速率的敏感性大于低加载速率;三种应力路径下的孔压-加载速率关系曲线,均可用对数函数关系描述。
Herein ABAQUS finite element software was used to establish an axisymmetric model,thus the mechanical responses of saturated red clay in the south of Jiangxi under different loading rates and stress paths were analyzed,and then the feasibility of the numerical model was verified.The result shows that,under different stress paths,the stress-strain curve and the pore pressure-strain curve of the red clay have different characteristics of change and,under the same stress path,the loading rate will not impact the overall growth trend,but determine the peak value;the sensitivity of the red clay to lateral unloading is higher than that to axial loading,the sensitivity to high loading rate is larger than that to low loading rate.The pore pressure-loading rate curves under three stress paths may be described by logarithmic function.
作者
吴建奇
陈腾
WU Jianqi;CHEN Teng(School of Civil and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)
出处
《路基工程》
2024年第5期51-56,共6页
Subgrade Engineering
基金
国家自然科学基金项目(51768025)。
关键词
红黏土
应力路径
加载速率
有限元分析
二次开发
red clay
stress path
loading rate
finite element analysis
secondary development
