A novel model for the cumulative plastic strain of soft marine clay under long-term low cyclic loads
A novel model for the cumulative plastic strain of soft marine clay under long-term low cyclic loads
复制标题
长期低循环荷载作用下软海相粘土累积塑性应变的新模型
DOI：
10.1016/j.oceaneng.2017.12.028
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发表时间：
2018-02
影响因子：
5
通讯作者：
Lv Le
中科院分区：
文献类型：
--
作者：
Ren Xing Wei;Xu Qi;Teng Jidong;Zhao Nan;Lv Le
施加在软土上的应力水平低于临界循环应力的长期循环荷载会导致土壤变形，但不会导致破坏。 Monismith 模型以其简单性和描述循环载荷下土壤累积塑性应变的能力而闻名。然而，它在这些情况下应用并不成功，因为随着载荷循环次数的增加，该模型中的塑性应变将无休止地增加直至失效。针对这一问题，基于Hardin-Drnevich模型和Monismith模型的类比分析，提出了一种新的三参数经验模型。经现有文献的实验数据验证，该模型在预测长期低循环荷载作用下软土的累积塑性应变方面比 Monismith 模型具有更好的能力和性能。对于软土，参数bi的值推荐为0.5，并且还提出了参数a和c与循环应力比的关系。详细阐述了该模型的应用，并利用软基沉降现场试验结果评价了该模型的性能。预测结果与测试结果一致。研究结果为研究波浪和/或交通荷载引起的近岸和近海区域软基变形和沉降的发展提供了一种有前途的方法。
Long-term cyclic loads with a stress level lower than the critical cyclic stress applied on soft soil can lead to soil deformation but not to failure. The Monismith model is known for its simplicity and capacity to describe the cumulative plastic strain of soil under cyclic loads. However, it is unsuccessfully applied in these cases because the plastic strain in this model would increase endlessly till to failure with increasing number of load cycles. To solve this problem, a novel empirical model with three parameters is proposed based on analogy analysis of the Hardin-Drnevich model and Monismith model. The proposed model is verified by experimental data from existing literature and is shown to have better capability and performance than the Monismith model in predicting the cumulative plastic strain of soft soil subjected to long-term low cyclic loads. The value of parameterbis recommended to be 0.5, and relationships of parametersaandcwith the cyclic stress ratio are also proposed for soft clay. Applications of the proposed model are elaborated in detail, and in situ test results for settlement of soft subgrade are used to evaluate the performance of this model. The prediction results are consistent with the test results. The research results present a promising method for investigating the development of deformation and the settlement of soft foundation in the near-shore and off-shore areas caused by wave and/or traffic loads.
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影响因子：
5
作者：
S. N. Rao;A. Panda
通讯作者：
S. N. Rao;A. Panda
大量循环三轴试验中软海相粘土的应变和孔隙压力发展
影响因子：
5
作者：
Wang Jun;Guo Lin;Cai Yuanqiang;Xu Changjie;Gu Chuan
通讯作者：
Gu Chuan
影响因子：
3.6
作者：
G. Lefebvre;D. Leboeuf;Benoît Demers
通讯作者：
G. Lefebvre;D. Leboeuf;Benoît Demers
DOI：
--
发表时间：
1994
期刊：
--
影响因子：
--
作者：
Dingqing Li
通讯作者：
Dingqing Li
影响因子：
3.6
作者：
C. Ng;Guo-bin Liu;Qing Li
通讯作者：
C. Ng;Guo-bin Liu;Qing Li