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| 粘土的粘塑性特性试验与三要素本构模型 | |
| 引用本文： | 李建中,彭芳乐,龙冈文夫.粘土的粘塑性特性试验与三要素本构模型[J].岩土力学,2005,26(6):915-919. |
| 作者姓名： | 李建中 彭芳乐 龙冈文夫 |
| 作者单位： | 1. 中南大学,地学与环境工程学院,湖南,长沙,410083 2. 日本株式会社白石技术本部,日本,东京 3. 日本东京大学,土木工学科土力学及岩土工程研究室,日本,东京 |
| 摘 要： | 研究了3种粘土的未扰动试样和重塑试样在三轴排水固结试验条件下的粘塑性。在试验过程中,利用计算机控制应变控制式三轴仪的加载速度,实现了在不同加载阶段的不同恒应变率加载。依据应力对应变率改变的响应程度对粘土的粘塑性进行了评价。实验结果表明,粘土的粘塑性表现为等时特性,并且经过一定时间的蠕变后,粘土强度会有较大地提高。并指出粘土的粘塑性应力-应变特性可以较好地采用非线性三要素模型对它进行描述。 |
| 关 键 词： | 粘塑性 三要素本构模型 土力学 |
| 文章编号： | 1000-7598-(2005)06-0915-05 |
| 收稿时间： | 2004-02-08 |
| 修稿时间： | 2004年2月8日 |
Viscoplastic properties of clay and constitutive model |
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| LI Jian-zhong,PENG Fang-le,TATSUOKA Fumio.Viscoplastic properties of clay and constitutive model[J].Rock and Soil Mechanics,2005,26(6):915-919. | |
| Authors: | LI Jian-zhong PENG Fang-le TATSUOKA Fumio |
| Institution: | 1. College of Geoscience and Environment Engineering, Central South University, Changsha 410083, China; 2. Technical Development Division, Shiraishi Corporation, Tokyo, Japan; 3. Department of Civil Engineering, University of Tokyo, Tokyo, Japan |
| Abstract: | Viscoplastic properties of clay were studied based on the test results of undisturbed and reconstituted specimens of three types of clays. To evaluate the viscoplastic properties, the strain rate was changed stepwise many times and creep tests were performed several times under otherwise monotonic loading on the different types of clay specimens. In addition, a nonlinear three-component model was proposed, which can simulate well the viscoplastic properties of clay. |
| Keywords: | viscoplastic property constitutive model soil mechanics |
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