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工业建筑  2008 

基于统一硬化参数的旋转硬化模型

DOI: 10.13204/j.gyjz200808003

Keywords: 统一硬化模型,超固结土,旋转硬化

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Abstract:

为反映应力诱导各向异性特性,在统一硬化模型以及超固结土模型的基础上,结合屈服面的旋转硬化机制,将以往只反映等向硬化机制的模型推广为混合硬化模型。分别对黏土的排水应力路径以及砂土的不排水应力路径的应力-应变关系进行预测。结果表明所提模型不仅能较好地描述黏土材料在循环加载条件下的应力-应变关系;同时,对于不同初始条件下的饱和砂土在循环加载条件下的应力-应变关系也能作出合理预测,验证了所提模型的合理性。

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