| Decoupling Conditions for Elasto-plastic Consolidation Question Based on Numerical Modeling Method |
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| 作者姓名： | Cheng Tao Wang Jingtao Dong Bichang |
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| 作者单位： | [1]School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China [2]Civil Engineering Department, Huangshi College of Science ＆ Technology, Huangshi 435003, China [3]School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074., China |
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| 摘 要： | INTRODUCTION Theconsolidationofsaturatedsoilisanimpor tantsubjectingeomechanics.Biot(1941)proposed thethree dimensionalconsolidationtheory,whichis basedontheprincipleofeffectivestress,continuity conditionsandequilibriumequations.Theremarka blesuccessofthistheoryistheanalysisofthetime dependenteffectandcouplingeffectofsoilandpore water.Thus,thetheoryisaclassictheoryinsatu ratedsoilstatistics.Itwasalmostunfeasibletoperformanalysesof thistheorywithoutthedevelopmentofhigh speed computersandnu…
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| 关 键 词： | 土壤 膨胀性 扩散作用 固液耦合 应力途径 |
| 收稿时间： | 2005-06-22 |
| 修稿时间： | 2005-08-25 |
Decoupling Conditions for Elasto-plastic Consolidation Question Based onNumerical Modeling Method |
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| Cheng Tao Wang Jingtao Dong Bichang.Decoupling Conditions for Elasto-plastic Consolidation Question Based on Numerical Modeling Method[J].Journal of China University of Geosciences,2005,16(4):363-368. |
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| Authors: | Cheng Tao Wang Jingtao Dong Bichang |
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| Abstract: | Elasto-plastic consolidation is one of the classic coupling questions in geomechanics. To solve this problem, an elasto-plastic constitutive model is derived based on the numerical modeling method. The model is applied to Biot's consolidation theory. Incremental governing partial differential equations are established using this method. According to the stress path, the decoupling condition of these equations is discussed. Based on these conditions, an incremental diffusion equation and uncoupling governing equations are presented. The method is then applied to numerical analyses of three examples. The results show that (1) the effect of the stress path should be taken into account in the simulation of the soil consolidation question; (2) this decoupling method can predict the evolvement of pore water pressure; (3) the settlement using cam-clay model is less than that using numerical model because of dilatancy. |
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| Keywords: | numerical modeling method Biot's consolidation stress path constitutive model liquid-solid coupling decouple incremental diffusion equation dilatancy |
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