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| 砂土速率相关黏性特性的有限元分析 | |
| 引用本文： | 李福林,彭芳乐,KONGKITKUL Warat,龙冈文夫.砂土速率相关黏性特性的有限元分析[J].同济大学学报(自然科学版),2011,39(1):13-17. |
| 作者姓名： | 李福林 彭芳乐 KONGKITKUL Warat 龙冈文夫 |
| 作者单位： | 1. 同济大学,地下建筑与工程系,上海,200092;同济大学,岩土及地下工程教育部重点实验室,上海,200092 2. 吞武里蒙库国王科技大学,土木工程系,泰国,曼谷,10140 3. 东京理科大学,土木工程系,日本,千叶,278-8510 |
| 基金项目： | 国家自然科学基金(50679056,40972176); 教育部新世纪优秀人才支持计划(NCET-06-0378); 上海市曙光计划(05SG25); 上海市重点学科建设项目(B308) |
| 摘 要： | 根据复杂加载条件下饱和砂土排水平面应变压缩试验,分析了砂土的速率相关的黏性特性.试验发现砂土存在显著的加载速率效应、蠕变变形和应力松弛,并且在应变速率突变、蠕变或应力松弛之后,以新的应变速率重新加载时呈现出高刚度行为.针对砂土的变形强度特性提出了一种非线性有限元计算方法,砂土本构关系采用了三要素弹黏塑性本构模型.将有限元计算结果与试验结果进行比较,表明建议的有限元计算方法不仅可以较为精确地模拟砂土的平均应力-应变关系,同时也可以模拟包含变应变速率加载、蠕变加载、应力松弛加载的全过程黏塑特性. |
| 关 键 词： | 砂土 弹黏塑性 加载速率 有限元 蠕变 |
| 收稿时间： | 8/10/2009 6:59:08 PM |
| 修稿时间： | 2010/11/25 0:00:00 |
FEM Analyses on Rate dependent Behaviors of Sand Due to Its Viscous Properties |
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| LI Fulin,PENG Fangle,KONGKITKUL Warat and TATSUOKA Fumio.FEM Analyses on Rate dependent Behaviors of Sand Due to Its Viscous Properties[J].Journal of Tongji University(Natural Science),2011,39(1):13-17. | |
| Authors: | LI Fulin PENG Fangle KONGKITKUL Warat and TATSUOKA Fumio |
| Institution: | LI Fulin1,2,PENG Fangle1,KONGKITKUL Warat3,TATSUOKA Fumio4(1.Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China,2.Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education,3.Department of Civil Engineering,King Mongkut's University of Technology Thonburi,Bangkok 10140,Thailand,4.Department of Civil Engineering,Tokyo University of Science,Chiba 278-8510,Japan) |
| Abstract: | Based on the experimental results from drained plane strain compression(PSC)tests on saturated sand under complex loading histories,the rate-dependent behaviors of sand due to its viscous properties were studied.It was found that sand exhibits obvious loading rate effects,creep deformation and stress relaxation.When monotonic loading was restarted immediately after a step-change in the strain rate or following a creep loading or stress relaxation stage,the stress-strain relation showed a very high tangent s... |
| Keywords: | sand elasto-viscoplastic properties loading rate finite element method creep |
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