不同胶结半径的粒间胶结拉伸和压缩试验研究

蒋明镜; 李晨辉; 刘蔚; 张安; 张学文

doi:10.11779/CJGE2018S2003

不同胶结半径的粒间胶结拉伸和压缩试验研究 English Version

蒋明镜^1,2,3,
李晨辉^1,2,3,
刘蔚^1,2,3,
张安^1,2,3,
张学文^1,2,3

1.同济大学土木工程防灾国家重点实验室,上海 200092;
2. 同济大学岩土及地下工程教育部重点实验室,上海 200092;
3. 同济大学土木工程学院地下建筑与工程系, 上海 200092

基金项目: 国家自然科学基金项目（51579178）; 土木工程防灾国家重点实验室自主研究课题（SLDRCE14-A-04）; 国家重点基础研究发展计划（“973”）项目（2014CB046901）

详细信息

作者简介:
蒋明镜(1965- )男,博士,教授,博士生导师,国家杰出青年科学基金获得者,主要从事太空土、深海能源土、天然结构性黏土、砂土、非饱和土的宏微观试验、本构模型和数值分析研究; E-mail:mingjing.jiang@tongji.edu.cn;

中图分类号: TU43
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出版历程
- 收稿日期: 2018-07-21
- 发布日期: 2018-10-29

Extension and compression tests mechanical behaviors of bonded granules with different bond widths

JIANG Ming-jing^1,2,3,
LI Chen-hui^1,2,3,
LIU Wei^1,2,3,
ZHANG An^1,2,3,
ZHANG Xue-wen^1,2,3

1. State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;
2. Key Laboratory of Geotechnical & Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;
3. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China

摘要

摘要: 为在三维离散元模型中建立考虑胶结半径的胶结破坏准则,在已有10 mm胶结半径的三维铝球胶结试验的基础上,继续对胶结半径为8,12,14 mm的胶结铝球进行拉伸和压缩试验。结合10 mm胶结半径的试验数据,总结出不同胶结半径的胶结铝球拉伸与压缩的强度规律。试验结果表明：高铝水泥试样的拉伸强度与压缩强度随着胶结半径的增大而非线性增大;位移曲线在拉伸荷载下表现为脆性破坏,在压缩荷载下表现脆塑性和塑性破坏,并且压缩荷载下发生脆塑性破坏的概率随着胶结半径的减小而增大。
- 胶结颗粒 /
- 三维接触试验 /
- 胶结强度 /
- 胶结半径
Abstract: In order to establish a new bond failure criterion considering different bonded widths to be used in three-dimensional distinct element modelling, another three kinds of bond widths (i.e., 8, 12 and 14 mm) between granules are investigated based on the previous work. Then, a series of extension and compression tests are carried out on cemented aluminum balls with three different bond widths, from which the bond failure criteria are obtained considering different bonded widths under tension and compression. The test results show that the tensile and compressive strengths both increase non-linearly with the bond width. The curves of the relationship between the tension and normal displacement exhibit elastic brittle failure. However, those between the compression and normal displacement are influenced by the bond width. The curves more probably show plastic failure if the bond width is larger, while those of the specimens with smaller bond width more probably show brittle-plastic failure.
- bonded granule /
- 3D contact experiment /
- bond strength /
- bond width

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参考文献(16)

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