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饱和砂土的渐近状态特性及其模拟 被引量:16

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摘要 在UH(统一硬化)模型的基础上,基于部分塑性体积应变与塑性剪应变有耦合的思路,把对土塑性变形有影响的硬化参量分为耦合硬化参量和非耦合硬化参量,提出了一个新的双硬化的弹塑性本构模型.此模型新颖之处在于它不但可以有效的考虑应力路径也可以考虑应变路径对应力应变特性的影响,所以新模型既能合理预测排水、不排水,也可以模拟部分排水及部分吸水条件下的应力应变关系.结合渐近状态概念,还给出了基于饱和砂土排水试验参数计算不排水极限应力比、静止土压力系数K0的简单公式.模型参数简单,仅比Cam-clay模型多了一个特征状态点应力比,全部可通过常规三轴压缩试验简单确定.
出处 《中国科学(E辑)》 CSCD 北大核心 2009年第1期39-47,共9页 Science in China(Series E)
基金 国家自然科学基金(批准号:10672010,50479001,90715035) 国家重点基础研究发展计划(“973”计划)(批准号:2007CB714203)资助项目
作者简介 E—mail:tluo@buaa.edu.cn
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参考文献16

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二级参考文献19

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