摘要
基于SMP准则,研究了八面体面6个主应力空间域与空间滑动面、应力状态3者之间的关系,考虑土材料的空间滑动面会随着主应力的夹角变化,提出一般应力条件下的各向异性材料的强度变化规律表达式。对真三轴条件下各向异性黄土强度特性的模拟结果表明,建立的基于空间面变化的各向异性强度变化表达能够较好地反映黄土材料在一般应力条件下的强度变化规律,尤其是材料空间滑动面方向与应力主轴成任意角度时的强度变化具有较好的适用性。
Based on the criterion of spatial mobilization plane(SMP),the relationship among the six principal stress spatial domains of the octahedral surface,the SMP and stress state is studied.Considering that the SMP of the soil material changes with the angle of the principal stress,a mathematical expression is proposed to reflect the strength characteristics of anisotropic materials under general stress conditions.The simulated results of the strength characteristics of anisotropic loess under true triaxial conditions show that the established expression for the variation of anisotropic strength variation based on variation of spatial plane can better reflect the strength variation law of loess materials under general stress conditions,especially the strength variation when the direction of the SMP of materials is at an arbitrary angle to the principal axis of stress.
作者
许萍
孙志军
邵生俊
XU Ping;SUN Zhi-jun;SHAO Sheng-jun(Institute of Water Resources and Hydro-electric Engineering,Xi'an University of Technology,Xi'an 710048,China;Institute of Geotechnical Engineering,School of Civil Engineering and Architecture,Xi'an University of Technology,Xi'an 710048,China)
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2021年第6期1118-1124,共7页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金青年基金项目(51808445)
陕西省自然科学基础研究计划资助项目(2018JQ5006)
陕西省教育厅重点实验室科研计划项目(17JS092)
西安理工大学校博士科研启动金项目(2560816023)。
关键词
空间面变化
各向异性
真三轴试验
强度变化
黄土
spatial mobilization plane
variation
anisotropy
true traxial test
strength variation
loess
作者简介
许萍(1986-),女,陕西西安人,讲师,主要从事岩土材料测试及土石坝灾害防治。E-mail:xuping1986@xaut.edu.cn。
