黏土的一维非平行等效时间线流变模型
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国家自然科学基金资助项目(51178419);浙江省教育厅科技资助项目(Y20108478)


A 1-D Nonparallel Equivalent-time-lines Rheological Model for Clay
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    摘要:

    在连续介质流变理论框架内研究了等效时间与流变速率之间的内在关系。当软土的流变速率仅取决于应力和应变量时,在相同应力和应变状态下简单加荷历史的黏土流变速率等于复杂加荷历史的流变速率,故根据简单加荷历史反算而得的黏土流变速率可用于复杂加荷历史的建模工作,在简单加荷历史下反算黏土流变速率所用的持续时间即是等效时间,在简单加荷历史簇中相同等效时间的应力应变关系线即为等效时间线。根据上述建模思路,获得了软土等效时间线不平行时流变速率与等效时间之间的关系, 建立了等效时间线不平行时黏土的一维流变模型,该流变模型可退化

    Abstract:

    The relationship between equivalent time and rheological velocity is studied in the frame of viscous continuum theory. If rheological velocity is only determined by stress and strain, the rheological velocity in the simple loading history is equal to that in the complex loading history when they have the same stress and the same strain. Then the rheological velocity re-calculated in the simple loading history can be used to establish the model in the complex loading history. The lasting time used to re-calculate rheological velocity in the simple loading history is called the equivalent time, and the stress-strain relationship at the same equivalent time in the set of simple loading histories is called the equivalent time line. According to the above idea for formulating model, the relationship between equivalent time and rheological velocity is established for clay with nonparallel equivalent time lines, and a nonparallel equivalent-time-lines rheological model for clay is achieved. This model can be degenerated into Yin-Grahams 1-D rheological model when equivalent-time-lines are parallel to each other. The parameters of model are determined by trial data and the model is further verified to be valid from laboratory test for clay.

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胡亚元.黏土的一维非平行等效时间线流变模型[J].土木与环境工程学报(中英文),2012,34(2):32-38. HU Ya-yuan. A 1-D Nonparallel Equivalent-time-lines Rheological Model for Clay[J]. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING,2012,34(2):32-38.10.11835/j. issn.1674-4764.2012.02.006

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