软土循环扭剪应力应变响应的弹塑性分析

王建华; 程星磊

doi:10.11779/CJGE201511004

软土循环扭剪应力应变响应的弹塑性分析 English Version

1. 天津大学水利工程仿真与安全国家重点实验室,天津 300072;
2. 天津大学岩土工程研究所,天津 300072

基金项目: 国家自然科学基金项目（51179120）; 博士点基金项目（20130032110045）

详细信息

作者简介:
王建华(1955- ),男,博士,教授,博士生导师,主要从事岩土地震工程与海洋岩土工程研究。E-mail: tdwjh@eyou.com。

计量
- 文章访问数: 286
- HTML全文浏览量: 1
- PDF下载量: 209
出版历程
- 收稿日期: 2014-09-05
- 发布日期: 2015-11-19

Elastoplastic analysis of cyclic torsion stress-strain responses of soft clays

1. State Key Laboratory of Hydraulic Engineering Simulation and Safety of Tianjin University;
2. Geotechnical Engineering Institute of Tianjin University, Tianjin 300072, China

摘要

摘要: 为了分析笔者提出的增量弹塑性模型对描述一般应力状态土单元循环应力应变响应的适用性,进行了软土不排水循环三轴压缩试验与无初始轴向偏应力的循环扭剪试验,得到了两种应力状态土单元的循环应力应变响应。进而依据循环三轴压缩试验结果确定模型参数,再利用模型预测软黏土循环扭剪试验土单元的应力应变响应,并与试验结果进行对比分析。结果表明,预测出的无轴向静偏应力作用的循环扭剪土单元环向剪应力应变滞回曲线与试验结果相比偏小,但是总变化趋势与试验结果较为一致;预测出的循环扭剪土单元环向累积剪应变随循环次数的变化与试验结果基本一致。研究工作表明,该增量弹塑性模型能够较好描述不同应力状态土单元的不排水循环应力应变响应,特别是循环累积应变响应。
- 软黏土 /
- 弹塑性模型 /
- 动本构关系 /
- 循环扭剪试验 /
- 循环累积应变
Abstract: The undrained cyclic triaxial compression tests and the undrained cyclic torsional tests without static axial deviatoric stress of soft clay are conducted to analyze whether the elasto-plastic model developed by the authors can describe the stress-strain response of soil elements with general stress state. The stress-strain responses associated with two stress states are obtained from tests. Model parameters are determined from cyclic triaxial compression test results. The stress-strain responses of soil elements associated with cyclic torsional tests are predicted by the model, and the predictions and test results are compared. Comparisons show that the predicted torsional shear stress-strain loops of soil elements without static axial deviatoric stress are less than test ones, but the predicted and test variations are consistent. The predicted variations of cyclic torsional accumulative shear strains with the number of cycles are consistent with test results. Researches show that the incremental elasto-plastic model can describe undrained stress-stain responses, especially the cyclic cumulative strain response of soil elements with the general stress state.
- soft clay /
- elasto-plastic model /
- cyclic constitutive relationship /
- cyclic torsional shear test /
- cyclic cumulative strain

HTML全文

参考文献(14)

[1]	PREVOST J H. Mathematical modelling of monotonic and cyclic undrained clay behaviour[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 1977, 1(2): 195-216.
[2]	BORJA R I, AMIES A P. Multiaxial cyclic plasticity model for clays[J]. Journal of Geotechnical Engineering, 1994, 120(6): 1051-1070.
[3]	王建华, 要明伦. 软黏土不排水循环特性的弹塑性模拟[J].岩土工程学报, 1996, 18(3): 11-18. (WANG Jian-hua, YAO Ming-lun. Elastoplastic simulation of the cyclic undrained behaviour of soft clays[J]. Chinese Journal of Geotechnical Engineering, 1996, 18(3): 11-18. (in Chinese))
[4]	熊玉春, 陈久照. 考虑各向异性影响的循环弹塑性模型[J]. 岩土工程学报, 2008, 30(8): 1165-1170. (XIONG Yu-chun, CHEN Jiu-zhao. Cyclic elasto-plastic constitutive model considering anisotropic effect[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(8): 1165-1170. (in Chinese))
[5]	黄茂松, 刘莹. 基于非线性运动硬化模型的饱和黏土桩基础竖向循环弱化数值分析[J]. 岩土工程学报, 2014, 36(12): 2170-2178. (HUANG Mao-song, LIU Ying. Numerical analysis of axial cyclic degradation of a single pile in saturated soft soil based on nonlinear kinematic hardening constitutive model[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(12): 2170-2178. (in Chinese))
[6]	DAFALIAS Y F, HEMNANN L R. A boundary surface soil plasticity model[C]// Proceedings of International Symposium on Soils under Cyclic Transient Load. Rotterdam: Balkema Publ, 1980: 335-356.
[7]	MROZ Z, NORRIS V A, ZIENKIEWICZ O C. An anisotropic critical state model for soils subject to cyclic loading[J]. Géotechnique, 1981, 31(4): 451-469.
[8]	KRIEG R D. A practical two surface plasticity theory[J]. Journal of Applied Mechanics, ASME, 1975, 42(3): 641-646.
[9]	LIANG R, MA F G. Anisotropic plasticity model for undrained cyclic behavior of clays[J]. Journal of Geotechnical Engineering, ASCE, 1992, 118(2): 229-265.
[10]	LI T, MEISSNER H. Two-surface plasticity model for cyclic undrained behavior of clays[J]. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 2002, 128(7): 613-626.
[11]	黄茂松, 刘明, 柳艳华. 循环荷载下软黏土的各向异性边界面模型[J]. 水利学报, 2009, 40(2): 188-193. (HUANG Mao-song, LIU Ming, LIU Yan-hua. Anisotropic bounding surface model for saturated soft clay under cyclic loading [J]. Journal of Hydraulic Engineering, 2009, 40(2): 188-193. (in Chinese))
[12]	胡存, 刘海笑. 适用于饱和黏土循环动力分析的新型边界面塑性模型[J]. 水利学报, 2011, 42(10): 1192-1200. (HU Cun, LIU Hai-xiao. A new type of bounding surface plasticity model for cyclic behavior of saturated clay[J]. Journal of Hydraulic Engineering, 2011, 42(10): 1192-1200. (in Chinese))
[13]	程星磊, 王建华, 李书兆. 软黏土不排水循环应力应变响应的弹塑性模拟[J]. 岩土工程学报, 2014, 36(5): 933-941. (CHENG Xing-lei, WANG Jian-hua, LI Shu-zhao. Elastoplastic simulation for undrained cyclic stress-strain response of soft clay[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(5): 933-941. (in Chinese))
[14]	王建华, 曲延大. 循环应力作用下饱和软黏土的不固结不排水强度与破坏准则[J]. 水利学报, 2011, 42(6): 672-677. (WANG Jian-hua, QU Yan-da. Unconsolidated and undrained strength and failure criterion of soft clay under cyclic stresses[J]. Journal of Hydraulic Engineering, 2011, 42(6): 672-677. (in Chinese))

施引文献

资源附件(0)

计量

文章访问数: 286
HTML全文浏览量: 1
PDF下载量: 209
被引次数: 0

软土循环扭剪应力应变响应的弹塑性分析 English Version

作者简介: 王建华(1955- ),男,博士,教授,博士生导师,主要从事岩土地震工程与海洋岩土工程研究。E-mail: tdwjh@eyou.com。

计量

出版历程

Elastoplastic analysis of cyclic torsion stress-strain responses of soft clays

计量

出版历程

目录

作者简介:
王建华(1955- ),男,博士,教授,博士生导师,主要从事岩土地震工程与海洋岩土工程研究。E-mail: tdwjh@eyou.com。