| 软土的循环累积变形模型研究 |
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| 引用本文： | 赵春彦,周顺华.软土的循环累积变形模型研究[J].中南大学学报(自然科学版),2011,42(12). |
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| 作者姓名： | 赵春彦 周顺华 |
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| 作者单位： | 1. 中南大学土木工程学院,湖南长沙,410075
2. 同济大学道路与交通工程教育部重点实验室,上海,201804 |
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| 基金项目： | 国家高技术研究发展计划(“863”计划)重大项目(2009AA11Z101); 中南大学博士后科学基金资助项目(2011年) |
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| 摘 要： | 基于上海地区饱和软土的动三轴试验成果,通过对累积变形影响因素及累积变形发展规律的分析,引入等效循环动应力水平的概念,建立能综合考虑列车荷载循环次数、静偏应力和和动偏应力的耦合作用、固结方式等影响因素的软粘土循环累积变形模型.结合试验成果对模型进行验证,确定不同试验条件下模型中的试验系数.研究结果表明:此模型能够很好地反映多种因素对软土循环累积变形规律的影响；此模型仅适用于软土正常固结且循环应力比小于临界循环应力比的情况；为提高模型计算和预测的精度,用室内试验确定模型中的试验系数时,应采用与现场实际相符的加载和固结条件.
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| 关 键 词： | 列车荷载 软土 累积变形模型 等效循环动应力水平 正常固结 |
Cyclic accumulative deformation model of soft clay |
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| ZHAO Chun-yan
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ZHOU Shun-hua.Cyclic accumulative deformation model of soft clay[J].Journal of Central South University:Science and Technology,2011,42(12). |
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| Authors: | ZHAO Chun-yan ZHOU Shun-hua |
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| Institution: | ZHAO Chun-yan1,ZHOU Shun-hua2 (1.School of Civil Engineering,Central South University,Changsha 410075,China,2.Key Laboratory of Road and Traffic Engineering of Ministry of Education,Tongji University,Shanghai 201804,China) |
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| Abstract: | Based on the results of dynamic triaxial test on soft clay in Shanghai,the factors influencing accumulative deformation and its development law were analyzed.The concept of equivalent cyclic dynamic stress level was introduced.Then a model on accumulative deformation of soft clay was put forward when taking cyclic number of train loading,coupling effect of static deviator stress and dynamic deviator stress,consolidation ways into account.The model was verified by test results.Test coefficients in the model ... |
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| Keywords: | train loading soft clay accumulative deformation model equivalent cyclic dynamic stress level normal consolidation |
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