| 南京片状细砂不排水循环三轴试验的数值仿真 |
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| 引用本文： | 刘雪珠,陈国兴,庄海洋.南京片状细砂不排水循环三轴试验的数值仿真[J].地震工程与工程振动,2009,29(3). |
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| 作者姓名： | 刘雪珠 陈国兴 庄海洋 |
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| 作者单位： | 1. 南京工业大学,岩土工程研究所,江苏,南京,210009;江苏省岩土工程公司,江苏,南京210018
2. 南京工业大学,岩土工程研究所,江苏,南京,210009 |
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| 基金项目： | 国家自然科学基金重大研究计划项目(90715018);;国家重点基础研究发展计划项目(2007CB714200);;中国地震局地震工程与工程振动开放实验室基金(2007A02) |
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| 摘 要： | 基于软件ABAQUS的二次开发平台,引入Byrne修正的Martin和Finn孔压应变模型,并与土体动力黏塑性记忆型嵌套面模型相结合,通过编制Fortran子程序,嵌入到软件ABAQUS中,实现了软件ABAQUS的有效应力算法,对南京片状细砂土的不排水循环三轴试验进行三维数值仿真。通过与循环三轴试验结果的比较,发现数值模拟结果基本上能再现南京片状细砂的不排水循环特性,如不排水循环三轴试验的动应力?应变关系、应变累积、应变软化等;且数值仿真结果较好地反映了试验结果的振动孔压发展特征。研究的意义在于理想三维数值模拟试验能够突破常规的室内土工试验能力及其局限性,这为今后饱和砂土不排水循环特性的宏、细观机理的进一步研究奠定了基础。
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| 关 键 词： | 循环三轴试验 三维数值仿真 南京片状细砂 不排水动力特性 |
Numerical simulation of undrained cyclic triaxial tests of Nanjing flake-shaped fine sand |
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| LIU Xuezhu,CHEN Guoxing,ZHUANG Haiyang.Numerical simulation of undrained cyclic triaxial tests of Nanjing flake-shaped fine sand[J].Earthquake Engineering and Engineering Vibration,2009,29(3). |
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| Authors: | LIU Xuezhu CHEN Guoxing ZHUANG Haiyang |
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| Institution: | 1.Institute of Geotechnical Engineering;Nanjing University of Technology;Nanjing 210009;China;2.Geotechnical Engineering Company of Jiangsu Province;Nanjing 210018; |
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| Abstract: | Based on the ABAQUS finite-element software,the Martin and Finn pore-water pressure-strain model modified by Byrne is inset into the viscous-plastic memorial nested yield surface dynamic constitutive model and the modified constitutive model is developed according to the further developing platform,and an effective stress calculating method is implemented.By means of the three-dimensional numerical model,the cyclic triaxial undrained shear tests of flake-shaped Nanjing fine sand soil are simulated by using ... |
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| Keywords: | cyclic triaxial tests three-dimensional numerical simulation flake-shaped Nanjing fine sand soil undrained dynamic properties |
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