一个改进的堆石料广义塑性模型

发布时间：2018-03-15 05:36

本文选题：广义塑性模型　切入点：塑性模量　出处：《岩土工程学报》2017年10期 　论文类型：期刊论文

【摘要】：在广义塑性理论框架下,通过引入两个修正系数修正塑性模量,增强了广义塑性模型在高围压条件下的适应性,成功地将砂土广义塑性模型改造成堆石料广义塑性模型。提出的修正广义塑性模型参数较少,容易确定,具有一定的实用性,并且可以推广至状态相关情况。模型中塑性模量公式简洁,可以退化成等向压缩塑性模量。模型可以很好地预测堆石料常规三轴加载应力应变关系,对等P以及等应力比路径也具有一定适应性。
[Abstract]:In the framework of generalized plasticity theory, the adaptability of the generalized plastic model under high confining pressure is enhanced by introducing two modified coefficients to modify the plastic modulus. The generalized plastic model of sand and soil has been successfully transformed into a pile of stone generalized plastic model. The proposed modified generalized plastic model has fewer parameters and is easy to determine, so it has certain practicability. The plastic modulus formula in the model is simple and can degenerate into isotropic compression plastic modulus. The model can well predict the stress-strain relationship of rockfill under conventional triaxial loading. The path of equal P and equal stress ratio also has some adaptability.
【作者单位】：同济大学地下建筑与工程系;南京水利科学研究院岩土工程研究所;水利部土石坝破坏机理与防控技术重点试验室;
【基金】：国家自然科学基金青年基金项目(51509163) 水利部公益性行业科研专项经费项目(201501035)
【分类号】：TV41

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