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冰川冻土  2013 

深部人工冻土黏弹塑损伤耦合本构模型研究及其验证

DOI: 10.7522/j.issn.1000-0240.2013.0137, PP. 1219-1223

Keywords: 本构模型,西原模型,柔度矩阵,ADINA有限元程序

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Abstract:

采用改进的Mohr-Coulomb屈服准则(Zienkiewicz-Pande准则),建立了能描述人工冻土3个阶段蠕变特性的黏弹塑损伤耦合本构模型.基于该本构模型建立了模型的柔度矩阵,将本构模型嵌入到ADINA有限元程序中.计算表明数值模拟得到的人工冻土蠕变特性曲线与实测值吻合良好,最大误差为4.8%,说明基于改进的Mohr-Coulomb准则建立的黏弹塑损伤耦合本构模型能够准确的描述人工冻土剪切特性和3个阶段的蠕变特性.获得的本构模型具有参数少、容易确定等优点.深部人工冻土黏弹塑损伤耦合本构模型的建立,对于人工冻土结构物长期稳定分析和预测具有重大的理论指导意义.

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