土木与环境工程学报（中英文）2025，Vol.47Issue(3)：1-11,11.DOI:10.11835/j.issn.2096-6717.2023.020
应力主轴变化对黄泛区粉质土各向异性特性的影响
Influence of stress principal axis variation on anisotropic behavior of silty soil in the Yellow River flood area
摘要
Abstract
A series of hollow cylinder torsion shear tests were conducted for the silty soil in the Yellow River flood area,considering the effect of drainage shearing with major large principal stress direction.The shear stress-strain behavior as well as the anisotropic characteristics of silty soil were investigated.Under different intermediate principal stress coefficients b and major principal stress direction angles α,the stress-strain relationship and the corresponding shear stress ratio of silty soil were obtained.It was concluded that the values of α and b have a significant effect on the octahedral stress-strain and the shear stress-major principal strain.The obvious anisotropicic behavior was observed,especially under b=0.5 or 1.0.Compressed deformation generally occurred in the major principal strain direction.Under a fixed α,the smaller shear strength occurred under a larger b value.The peak shear strength and the corresponding axial strain were the greatest under the conditions of α=45° and b=0.5,relevant with to the highest peak shear stress ratio qf/p0.关键词
粉质土/各向异性/应力-应变关系/主应力轴旋转/破坏强度Key words
silty soil/anisotropy/stress-strain relationship/rotation of principal stress axis/failure strength分类
土木建筑引用本文复制引用
曾长女,马媛,尹航,谷贺,王钰轲..应力主轴变化对黄泛区粉质土各向异性特性的影响[J].土木与环境工程学报（中英文）,2025,47(3):1-11,11.基金项目
国家自然科学基金(52109140) （52109140）
河南省科技攻关项目(212102110027) （212102110027）
河南省科技研发计划联合基金项目(222103810075) National Natural Science Foundation of China(No.52109140) （222103810075）
Henan Province Key Specialized Research and Development Breakthrough Plan(No.212102110027) （No.212102110027）
Henan Province Joint Fund Project of Science and Technology(No.222103810075) （No.222103810075）
