| 砂土应力路径本构模型的试验验证 |
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| 引用本文： | 路德春,罗汀,姚仰平.砂土应力路径本构模型的试验验证[J].岩土力学,2005,26(5):717-722. |
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| 作者姓名： | 路德春 罗汀 姚仰平 |
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| 作者单位： | 北京航空航天大学,土木工程系,北京,100083 |
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| 基金项目： | 国家自然科学基金项目(No.50479001)。 |
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| 摘 要： | 建立了砂土应力路径本构模型，揭示了应力路径影响砂土应力-应变关系的本质，在平均应力p变化不大的条件下主要是剪应力比的影响。当使用该模型计算应力-应变关系时，将应力路径线性化，分别计算等平均应力p路径和等应力比η路径上的应变。利用试验对模型所引用的关系式f（η）进行验证，试验结果和f(η)的理论值较为吻合，证明了模型引用关系式f(η)的合理性。并利用模型对复杂路径下砂土的应力-应变关系进行预测，对模型预测与试验结果进行比较，结果表明模型可以合理地考虑复杂应力路径对砂土应力-应变关系的影响。
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| 关 键 词： | 应力路径 本构模型 三维 试验 砂土 |
| 文章编号： | 1000-7598-(2005)05-0717-06 |
| 收稿时间： | 2004-02-02 |
| 修稿时间： | 2004年2月2日 |
Test validating of constitutive model of sand considering complex stress path |
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| LU De-chun,LUO Ting,YAO Yang-ping.Test validating of constitutive model of sand considering complex stress path[J].Rock and Soil Mechanics,2005,26(5):717-722. |
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| Authors: | LU De-chun LUO Ting YAO Yang-ping |
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| Institution: | Department of Civil Engineering, Beihang University, Beijing 100083, China |
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| Abstract: | A new constitutive model of sand considering complex stress path has been proposed. It offers an insight into a fact that, with the mean stress p a little changed, stress ratio is the essence that stress path influences the stress-strain relation of sand. When calculating the stress-strain relation using this model, the stress path is linearized in order to calculate respectively the strain on the mean stress path and equal stress ratio path. The test results accord with the theoretical prediction of pretty well, which proves the rationality of the way the model uses the function . The comparison between prediction and test results under the condition of complex stress path reflects that the model can rationally consider the influence of stress path on the stress-strain relation. |
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| Keywords: | stress path constitutive model three-dimension tests sand |
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