| 土体破坏时Duncan-Chang模型应用的若干关键技术 |
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| 引用本文： | 潘树来,王全凤,涂帆. 土体破坏时Duncan-Chang模型应用的若干关键技术[J]. 基建优化, 2007, 28(6): 157-160 |
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| 作者姓名： | 潘树来 王全凤 涂帆 |
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| 作者单位： | 华侨大学,土木工程学院,泉州,362021 |
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| 摘 要： | 由于土材料的实际性状非常复杂,并且随加载条件的不同而有很大变化.每一类型土的本构模型都有它特定的应用范围和局限性.1970年提出的邓肯-张(Duncan-Chang)模型是一种目前被广泛应用的非线性弹性模型,但在自然状态下,许多土的卸载-再加载性质是接近于线性和弹性的.为了反映土的这一特性,本文提出了在应用邓肯-张模型分析土体破坏时的若关键技术供应用时参考.着重处理了不同于单调加载时的卸我-再加载变形模量和泊桑比,建议了判断土的卸栽-再加载现象破坏准则.
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| 关 键 词： | 邓肯-张(Duncan-chang)模型 卸载-再加载 土体破坏 |
| 文章编号： | 1000-7717(2007)06-0157-04 |
| 修稿时间： | 2007-06-08 |
Some Key Techniques In Applying Duncan-Chang Model To Analyze Soil Failure |
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| PAN Shu-lai,WANG Quan-feng,TU Fan. Some Key Techniques In Applying Duncan-Chang Model To Analyze Soil Failure[J]. Optimization of Capital Construction, 2007, 28(6): 157-160 |
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| Authors: | PAN Shu-lai WANG Quan-feng TU Fan |
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| Abstract: | The actual properties of soil are very complicated and vary greatly with loading condition.The constitutive model of every kind of soil has its own application field and limitation.Duncan-Chang model presented in 1970 is a kind of widely used non-linear elastic models.However,the soil properties of unloading-reloading under natural condition are close to linear and elastic.Some key techniques in applying Duncan-Chang model to analyze soil failure are conducted in this paper for reference.The deformation modulus and Poisson's ratio of unloading-reloading differing with those under monotonic loading are treated emphatically and failure criteria under unloading-reloading is suggested. |
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| Keywords: | Duncan-Chang model unloading-reloading soil failure |
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