| 统一硬化模型与下加载面模型的理论关系 |
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| 引用本文： | 何冠,姚仰平.统一硬化模型与下加载面模型的理论关系[J].岩土力学,2022,43(Z2):11-22. |
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| 作者姓名： | 何冠 姚仰平 |
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| 作者单位： | 北京航空航天大学 交通科学与工程学院，北京 100191 |
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| 基金项目： | 国家重点研发计划（No.2018YFE0207100）；国家自然科学基金（No.51979001）；国家重点基础研究发展计划（No.2014CB047006） |
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| 摘 要： | Hashiguchi下加载面本构模型是国际上具有较大影响力的超固结土本构模型之一。因此，选取该模型进行理论和构建方法分析，并与UH模型进行对比。对比结果表明，Hashiguchi下加载面模型通过定义单一的数学公式来拟合超固结土内变量的变化规律，从而得到了超固结土应力?应变关系的公式；而统一硬化（unified hardening，简称UH）模型掌握了超固结土体的强度特性，因而能够更准确、合理地描述超固结土的应力?应变关系。相较于Hashiguchi下加载面本构模型，UH模型在理论上更为先进。同时，两个模型的试验预测与试验数据的对比也验证了UH模型在数值计算上的正确性与优越性。
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| 关 键 词： | 超固结土 本构模型 下加载面 UH模型 理论对比 |
| 收稿时间： | 2021-02-06 |
| 修稿时间： | 2021-05-21 |
Theoretical relation between unified hardening model and sub-loading surface model |
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| HE Guan,YAO Yang-ping.Theoretical relation between unified hardening model and sub-loading surface model[J].Rock and Soil Mechanics,2022,43(Z2):11-22. |
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| Authors: | HE Guan YAO Yang-ping |
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| Institution: | School of Transportation Science and Engineering, Beihang University, Beijing 100191, China |
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| Abstract: | Hashiguchi sub-loading surface constitutive model is one of the most influential constitutive models for over-consolidated soil. Therefore, this model is selected to analyze in terms of theoretical principle and construction method, and compare with the unified hardening(UH) model proposed by Yao et al. Through comparison, the Hashiguchi sub-loading surface model defines a single mathematical formula to fit the variation rule of the internal variables of the over-consolidated soil, and thus it can describe the stress-strain relationship of the over-consolidated soil. UH model holds the strength characteristics of over-consolidated soil, so it can describe the stress-strain relationship of over-consolidated soil more accurately and reasonably, which shows that the UH model is more advanced and complete in theory. At the same time, the comparison between the predictions of the two models and experimental data also verifies the correctness and superiority of UH model in numerical calculation. |
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| Keywords: | over-consolidated soil constitutive model sub-loading surface UH model theoretical comparison |
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