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工业建筑  2011 

基于统一硬化模型的结构性松砂应力-应变关系

DOI: 10.13204/j.gyjz201109006

Keywords: 松砂,临界状态,结构性参数,硬化参数,本构模型

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Abstract:

在临界状态理论的基础上,通过引入修正屈服函数的结构性参数,可更好地描述松砂的塑性变形特性。通过引入状态参数来调整硬化参数和剪胀方程,从而更好地反映松砂的剪缩特性和对密度、有效主应力的双重依赖性。同时,模型采用砂土等压固结线和临界状态线在有效应力幂函数平面内呈线性关系的特性,更准确地反映了砂土的应力-应变特性。通过数值模拟结果与试验结果对比,验证了模型的有效性。

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