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J4  2010, Vol. 44 Issue (4): 798-805    DOI: 10.3785/j.issn.1008-973X.2010.04.030
Viscousplastic stochastic finite element method for
foundation engineering under dual flow rule
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The threedimensional constitutional relationship and the plane strain constitutional relationship under the viscousplastic nonlinear stochastic numerical model were induced by the help of MohrCoulomb failure criterion viscous quasitime step form. Thereby, complicated characteristics of stochastic nonlinear mechanics gain on foundation engineering were studied based on key merits of the viscousplastic nonlinear stochastic finite element method. Furthermore, founded here was total strain theoretic viscousplastic nonlinear stochastic finite element algorithm. Porous medium viscousplastic nonlinear stochastic constitution in joint with isotropic as well as anisotropic porous pressure was invited on the basis of Naylor super static porous pressure theory. With the application to a three strata composite foundation during construction period, the random vector fields of displacement, stress, viscousplastic strain, porous pressure, in addition to the reliability distribution of the foundation on every loading phase were researched under two working behaviors respectively, namely, associated flow rule and unassociated flow rule. The comprehensive studies show that the reliability index has a close relation with the stochastic characteristics of the effective stress and porous pressure of the composite foundation under complex work behaviors; and that with the range from unassociated flow rule to associated one, the effective stress escalates under the decrease of expectation and variation on porous pressure while the reliability index accumulating, on which, the precise nonlinear numerical model under random mathematical coverage is formed.

出版日期: 2010-05-14
:  TU470  


作者简介: 王亚军(1976—),男,山西平定人,博士生,主要从事岩土工程力学研究. E-mail:
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王亚军, 张我华. 双重流动法则下地基黏塑性随机有限元方法[J]. J4, 2010, 44(4): 798-805.

WANG E-Jun, ZHANG Wo-Hua. Viscousplastic stochastic finite element method for
foundation engineering under dual flow rule. J4, 2010, 44(4): 798-805.


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