中南大学学报（自然科学版）2011，Vol.42Issue(12)：3844-3850,7.
软土的循环累积变形模型研究
Cyclic accumulative deformation model of soft clay
摘要
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 were gained under different testing conditions. The results show that this model reflects development law of accumulative deformation well under many kinds of influencing factors. This model is just applicable to normally consolidated soft clay on the condition that cyclic stress ratio is less than critical cyclic stress ratio. To improve calculating and predicting precision of the model, it is advised that loading and consolidating conditions, which are in accordance with actual field circumstances, should be applied in the laboratory test that is used to gain the test constant values of the model.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Key words
train loading/ soft clay/ accumulative deformation model/ equivalent cyclic dynamic stress level/ normal consolidation分类
建筑与水利引用本文复制引用
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):3844-3850,7.基金项目
国家高技术研究发展计划("863"计划)重大项目(2009AA11Z101) （"863"计划）
中南大学博士后科学基金资助项目(2011年) （2011年）
