冻粘土粘弹塑本构方程及试验验证
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摘要
通过冻土单轴蠕变试验结果分析,以西源模型为基础,假定冻土服从Mises屈服准则,推导出应用与数值计算的柔度矩阵;用三轴蠕变试验检验了冻土粘弹塑本构模型;获得了相应的试验拟合曲线。结果表明:蠕变理论模拟值与三轴实测蠕变结果相吻合,该模型可用于人工冻土工程设计。
With the analysis on the single axial creep t est resul t of the freezing soil,base on the Xiyuan model and the assuming of the freezin g soil yielded to the Mises yield code,the paper derived the flexible matrix fo r the value calculation.The freezing soil viscoelastic plastic constructive equa tion was verified with trial axial creep test.A related test fitting curve was o btained from the test.The results showed that the simulated value of the creep t heory could be matched with the results of the trial creep measurements.The mode l can be applied to the design of the artificial freezing soil project.
引文
[1]赵明华,等.软土流变特性的室内试验与改进的西源模型[J].湖南大学学报,2004,31(1).
    [2]张向东.冻土三轴流变特性试验研究与冻结壁厚度的确定[J].岩石力学与工程学报,2004,23(3).
    [3]贾乃文.粘塑性力学及工程应用[M].北京:地震出版社,2000.
    [4]孙钧.岩土工程材料流变理论[M].北京:中国建筑工业出版社,1999.

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