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冰川冻土 ›› 2013, Vol. 35 ›› Issue (5): 1219-1223.doi: 10.7522/j.issn.1000-0240.2013.0137

• 寒区科学与技术 • 上一篇    下一篇

深部人工冻土黏弹塑损伤耦合本构模型研究及其验证

汪承维, 李栋伟   

  1. 安徽理工大学 土木建筑学院, 安徽 淮南 232001
  • 收稿日期:2013-02-08 修回日期:2013-06-29 出版日期:2013-10-25 发布日期:2013-11-07
  • 作者简介:汪承维(1989-),女,安徽六安人,2007年毕业于安徽理工大学,现为在读硕士研究生,主要从事人工冻土本构模型研究工作.E-mail:cwwang1@163.com
  • 基金资助:
    国家自然科学基金项目(41271071);教育部新世纪人才基金项目(NCET-11-0887)资助

Study and Verification of Laboratory Prepared Frozen Soil Viscoelastic-Plastic Damage Coupling Constitutive Model

WANG Cheng-wei, LI Dong-wei   

  1. School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan Anhui 232001, China
  • Received:2013-02-08 Revised:2013-06-29 Online:2013-10-25 Published:2013-11-07

摘要: 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.

关键词: 本构模型, 西原模型, 柔度矩阵, ADINA有限元程序

Abstract: Based onmodified Mohr-Coulomb yield criterion (Zienkiewicz-Pande yield criterion), a viscoelastic-plastic damage coupling constitutive model, which could describe well the three stages of creep of frozen soil, have been establishedand aflexibility matrix of themodel has alsobeen developed. Embedding this constitutive model into a large-scale non-linear limit element procedure, ADINA,a series of curves about creepoffrozen soil were obtained. Comparing thesecurves with measured values found that the simulated values fit pretty to the measured ones, with amaximum error of4.8%. It means that the viscoelastic-plastic damage coupling constitutive model, based on Zienkiewicz-Pandecriterion, can accurately describe the shear and three-stagestrain properties of frozen soil. What's more, lots of shear and strain curves of frozen soil will be got by numerical simulation with a few mechanical parametersof frozen soil. It is believed that this study will be a very important theoretical direction for frozen-soil structure in long time stability analysis and forecast.

Key words: coupling constitutive model, Nishihara model, flexibility matrix, ADINA finite element program

中图分类号: 

  • P642.14