Strain and pore pressure development on soft marine clay in triaxial tests with a large number of cycles
Strain and pore pressure development on soft marine clay in triaxial tests with a large number of cycles
复制标题
大量循环三轴试验中软海相粘土的应变和孔隙压力发展
DOI：
10.1016/j.oceaneng.2013.10.005
复制
发表时间：
2013-12
影响因子：
5
通讯作者：
Gu Chuan
中科院分区：
文献类型：
--
作者：
Wang Jun;Guo Lin;Cai Yuanqiang;Xu Changjie;Gu Chuan
软海相粘土可能在很长一段时间内受到波浪或交通荷载的数万次循环作用。因此，其循环变形特性是岩土工程师关注的主要问题之一。在不同应力水平、不同围压条件下，对海相软黏土进行了高周次（5万次）三轴试验，研究了其应变和孔隙水压力的发展规律。得到了一些有益的结论。首先，弹性应变和永久应变的发展取决于循环应力比（CSR）值。当CSR较小时，1000次循环后的弹性应变几乎保持在一个恒定值，永久应变随CSR的增加而缓慢且几乎呈线性增加。当CSR较大时，即使在5万次循环后，弹性应变仍在增加，永久应变随CSR的增加呈指数级快速增长。其次，log （εp/N）与logx在经过一定的循环数（称为参考循环数）后呈近似线性关系。利用这一关系，建立了预测长期永久应变的经验公式。随着有效应力路径与临界状态线距离的减小，峰值轴向应变呈指数增长。提出了1000次循环后峰值轴向应变与峰值孔隙水压力的关系式。
Soft marine clays may be subjected to tens of thousands of cyclic applications of waves or traffic loads over a long period of time. Therefore, its cyclic deformation behavior is one of the major concerns of geotechnical engineers. In this study, a series of high cycle (50,000 cycles) triaxial tests have been carried out on soft marine clay with various stress levels and different confining pressures to investigate the development of strain and pore water pressure. Some useful conclusions are obtained. Firstly, the development of resilient and permanent strain depends on the cyclic stress ratio (CSR) values. When CSR is small, the resilient strain nearly keeps at a constant value after 1000 cycles and the permanent strain increases slowly and almost linearly with increasing CSR. When CSR is large, the resilient strain increases even after 50,000 cycles and the permanent strain increases rapidly and exponentially with increasing CSR. Secondly, log (εp/N) and logNexhibit a nearly linear relationship after a certain number of cycles which is called the reference number of cycles. An empirical formula is established to predict the long-term permanent strain by making use of this relationship. Thirdly, the peak axial strain increases exponentially with the decrease of the distance between the effective stress path and the critical state line. A formula is proposed to characterize the relationship between the peak axial strain and the peak pore water pressure after 1000 cycles.
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影响因子：
1.5
作者：
Huang Mao-song
通讯作者：
Huang Mao-song
DOI：
10.1061/(asce)0733-9410(1988)114:2(133
发表时间：
1988-02
期刊：
Journal of Geotechnical Engineering
影响因子：
--
作者：
M. Vucetic;R. Dobry
通讯作者：
M. Vucetic;R. Dobry
影响因子：
5
作者：
A. Hyde
通讯作者：
A. Hyde
影响因子：
4
作者：
C. Gu;Jun Wang;Yuanqiang Cai;Zhongxuan Yang;Yufeng Gao
通讯作者：
C. Gu;Jun Wang;Yuanqiang Cai;Zhongxuan Yang;Yufeng Gao
DOI：
10.1061/(asce)1090-0241(2002)128:11(907
发表时间：
2002-11-01
影响因子：
3.9
作者：
Chai, JC;Miura, N
通讯作者：
Miura, N