低重力环境下静力触探贯入机理离散元分析

蒋明镜; 戴永生; 王新新

doi:10.11779/CJGE201411010

低重力环境下静力触探贯入机理离散元分析 English Version

蒋明镜^1,2,3,
戴永生^1,2,3,
王新新^1,2,3

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

基金项目: 国家杰出青年科学基金项目（51025932）; 国家自然科学基金项目（51179128）

详细信息

作者简介:
蒋明镜(1965-),男,教授,博士生导师,主要从事天然结构性黏土、砂土、非饱和土、太空土和深海能源土宏观微观试验、本构模型和数值分析研究。E-mail:mingjing.jiang@tongji.edu.cn。

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- 文章访问数: 343
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出版历程
- 收稿日期: 2014-03-11
- 发布日期: 2014-11-19

DEM analysis of cone penetration tests under low gravity conditions

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

摘要

摘要: 采用离散元法对月面及地面跨度范围内重力场环境（1/6g,1/2,1g）下静力触探机理进行了分析,以弄清地面试验与月面试验的区别。模拟结果表明：①同一相对贯入深度处,重力加速度越小,贯入阻力越小,归一化贯入阻力越大;②土体变形形式由隆起变形向竖向压缩变形的转化深度随重力加速度的增加而减小;③同一相对贯入深度处,随重力加速度的增加,特征点的竖向隆起位移减小,竖向压缩位移增大,对应土体颗粒的侧向位移也越大;④重力加速度越小,相同相对位置处土体的加卸载现象越明显;⑤重力加速度越大对应相同相对贯入深度处的土体破坏范围愈大。
- 离散元法 /
- 静力触探试验 /
- 贯入阻力 /
- 低重力场
Abstract: The mechanism of cone penetration tests under low gravity (1/6g, 1/2g and 1g) fields is investigated by means of the distinct element method (DEM). The results show that (1) the cone tip resistance increases with the increase of gravity acceleration at the same relative penetration depth, while the normalized cone tip resistance presents the opposite trend; (2) the required depth, which the deformation pattern of the ground changes from swelling to compression, decreases with the increase of gravity acceleration; (3) the swelling deformation of characteristic points decreases with the increase of gravity acceleration at the same relative penetration depth, but the compression deformation and lateral displacement show the opposite trend; (4) the smaller gravity acceleration leads to the more apparent loading and unloading phenomena at the same relative position; (5) the larger gravity acceleration results in the larger failure zone at the same relative penetration depth.
- distinct element method /
- cone penetration test /
- cone tip resistance /
- low gravity field

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参考文献(21)

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文章访问数: 343
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低重力环境下静力触探贯入机理离散元分析 English Version

作者简介: 蒋明镜(1965-),男,教授,博士生导师,主要从事天然结构性黏土、砂土、非饱和土、太空土和深海能源土宏观微观试验、本构模型和数值分析研究。E-mail:mingjing.jiang@tongji.edu.cn。

计量

出版历程

DEM analysis of cone penetration tests under low gravity conditions

计量

出版历程

目录

作者简介:
蒋明镜(1965-),男,教授,博士生导师,主要从事天然结构性黏土、砂土、非饱和土、太空土和深海能源土宏观微观试验、本构模型和数值分析研究。E-mail:mingjing.jiang@tongji.edu.cn。