A Simple Effective Stress Approach for Modeling Rate-Dependent Strength of Soft Clay
A Simple Effective Stress Approach for Modeling Rate-Dependent Strength of Soft Clay
复制标题
模拟软粘土随速率变化的强度的简单有效应力方法
DOI：
10.1115/1.4038732
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发表时间：
2018-08
期刊：
影响因子：
--
通讯作者：
Zhang Xi Ying
中科院分区：
文献类型：
--
作者：
Yi Jiang Tao;Bai Shan;Li Yu Ping;Fu Yong;Lee Fook Hou;Zhang Xi Ying
本文提出了一种简单的有效应力方法，用于模拟许多细粒土在海上事件中遭受快速、大应变、不排水剪切时所经历的与应变率相关的强度行为。该方法基于将改进的 Cam-Clay 屈服点的大小与应变率相关联，即屈服点根据应变率增大或减小。提供了一种基于粘度计的方法来评估该方法所需的参数。粘度计测量结果表明，应变率参数在很大程度上与水含量无关，并且与先前研究的数据非常一致。由粘度计引起的环形简单剪切情况的数值分析显示，如果考虑了重塑引起的强度退化效应，则与实验数据非常一致。该方法允许通过有效应力计算更真实地分析海上基础安装过程，例如动态安装的海上锚、自由落体贯入仪和海底滑坡。
This paper proposes a simple effective stress method for modeling the strain rate-dependent strength behavior that is experienced by many fine-grained soils in offshore events when subjected to rapid, large strain, undrained shearing. The approach is based on correlating the size of the modified Cam-Clay yield locus with strain rate, i.e., yield locus enlarging or diminishing dependent on the strain rate. A viscometer-based method for evaluating the needed parameters for this approach is provided. The viscometer measurements showed that strain rate parameters are largely independent of water content and agree closely with data from a previous study. Numerical analysis of the annular simple shear situation induced by the viscometer shows remarkable agreement with the experimental data provided the remolding-induced strength degradation effect is accounted for. The proposed method allows offshore foundation installation processes such as dynamically installed offshore anchors, free-falling penetrometer, and submarine landslides to be more realistically analyzed through effective stress calculations.
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影响因子：
5
作者：
Hongxia Zhu;M. Randolph
通讯作者：
Hongxia Zhu;M. Randolph
影响因子：
3.6
作者：
DAYAL, U;ALLEN, JH
通讯作者：
ALLEN, JH
DOI：
10.1631/jzus.a1300331
发表时间：
2014-04
期刊：
Journal of Zhejiang University SCIENCE A
影响因子：
--
作者：
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通讯作者：
Qi-yin Zhu;Ze-xiang Wu;Yan-ling Li;Changjie Xu;Jian-Hua Wang;X. Xia
影响因子：
3.7
作者：
Hongjie Zhou;M. Randolph
通讯作者：
Hongjie Zhou;M. Randolph
影响因子：
5.8
作者：
Karstunen, M.;Yin, Z-Y.
通讯作者：
Yin, Z-Y.