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山东大学学报 (工学版) ›› 2022, Vol. 52 ›› Issue (6): 89-95.doi: 10.6040/j.issn.1672-3961.0.2021.354

• 土木工程 • 上一篇    

主应力旋转条件下粉细砂的非比例加载变形特性

扈萍1,2,滕越1,2*,马少坤3,4,刘莹3,4,张西文1,2,陈玉兰5   

  1. 1.济南大学土木建筑学院, 山东 济南 250022;2.山东省城市地下工程支护及风险监控工程技术研究中心, 山东 济南 250022;3.广西大学土木建筑工程学院, 广西 南宁 530004;4.广西大学工程防灾与结构安全重点实验室, 广西 南宁 530004;5. 济南市城市照明服务中心, 山东 济南 250000
  • 发布日期:2022-12-23
  • 作者简介:扈萍(1980—),女,山东东营人,博士,副教授,主要研究方向为土体的本构理论与变形特性研究. E-mail:pinghu2002@163.com. *通信作者简介:滕越(1998— ),女,山东新泰人,硕士研究生,主要研究方向为土体变形特性研究. E-mail:352842410@qq.com
  • 基金资助:
    国家自然科学基金资助项目(51979122);广西自然科学基金重点资助项目(2020GXNSFDA238024)

Non-proportional loading deformation characteristics of silty fine sand under principal stress rotation

HU Ping1,2,TENG Yue1,2*, MA Shaokun3,4, LIU Ying3,4, ZHANG Xiwen1,2, CHEN Yulan5   

  1. 1. School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, Shandong, China;
    2. Engineering Technology Research Center on Urban Underground Engineering Support and Risk Monitoring of Shandong Province, Jinan 250022, Shandong, China;
    3. College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, Guangxi, China;
    4. Key Laboratory of Disaster Prevention and Structural Safety, Guangxi University, Nanning 530004, Guangxi, China;
    5. Jinan City Lighting Service Center, Jinan 250000, Shandong, China
  • Published:2022-12-23

摘要: 对粉细砂进行一系列空心圆柱扭剪试验,研究土体在经历含主应力轴偏转的非比例加载路径时的变形特性,重点分析偏应力水平、中主应力系数对土体变形产生的影响。试验中发现弹性剪应变在总剪应变中所占比例较大。在此基础上重新定义了非共轴角,并对饱和粉细砂的变形特性及其影响因素进行研究。结果表明,纯主应力旋转过程中,不同偏应力比、中主应力系数的土体,广义剪应变的整体发展规律相似,偏应力比与中主应力系数对加载末期的土体应变硬化产生较大影响;偏应力比与广义剪应力相同时,中主应力系数的差异使得土体的各向异性在变形响应中得以体现,从而表现出广义剪应变的差异;主应力旋转将使粉细砂产生明显的塑性变形,相较于中主应力系数,偏应力比对于砂土非共轴变形特性的影响更大。

关键词: 主应力旋转, 非比例加载, 中主应力系数, 偏应力比, 非共轴角

中图分类号: 

  • TU411.3
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