Influence of Destructuration of Soft Clay on Time-Dependent Settlements: Comparison of Some Elastic Viscoplastic Models
Influence of Destructuration of Soft Clay on Time-Dependent Settlements: Comparison of Some Elastic Viscoplastic Models
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DOI：
10.1061/(asce)gm.1943-5622.0000281
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发表时间：
2015-10
影响因子：
3.7
通讯作者：
D. Nash;Matthew A. Brown
中科院分区：
文献类型：
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作者：
D. Nash;Matthew A. Brown
软土在地面荷载作用下的时变沉降可以用弹粘塑性本构模型来描述。对于增加应力接近和超过原位屈服应力的施加载荷，预测的行为受到粘土结构的相关破坏及其建模方式的强烈影响。四个弹粘塑性模型进行了比较，结果表明，尽管表象的差异，所有计算蠕变速率在基本上相同的方式。本文介绍了挪威岩土工程研究所最近组织的一个假设情况下的预测演习，比较了不同的计算方法用于软土沉降分析的一些预测。这里介绍的结果是从一个一维耦合固结分析中实现的电子表格为基础的软件，并使用有限元程序。参数是从一个oedometer测试，…
AbstractThe time-dependent settlement of soft soils following the application of surface loading may be modeled using elastic viscoplastic constitutive models to describe the soil behavior. For applied loadings that increase the stresses toward and beyond the in situ yield stress, the predicted behavior is strongly influenced by the associated breakdown of the clay structure and the way in which this is modeled. Four elastic viscoplastic models are compared and it is shown that, despite presentational differences, all calculate creep rate in fundamentally the same manner. This paper describes some predictions for a hypothetical case prediction exercise organized recently by the Norwegian Geotechnical Institute that compared different calculation methods used in settlement analyses of soft soil. The results presented here are from a one-dimensional coupled consolidation analysis implemented in a spreadsheet-based software and using a finite-element program. Parameters were obtained from an oedometer test, ...