| 结构性粘土的堆砌体模型 |
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| 引用本文： | 沈珠江.结构性粘土的堆砌体模型[J].岩土力学,2000,21(1):1-4. |
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| 作者姓名： | 沈珠江 |
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| 作者单位： | 南京水利科学研究院,江苏,南京,210029 |
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| 基金项目： | 国家自然科学基金资助项目!(No.1 9772 0 1 9) |
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| 摘 要： | 天然粘土一般都具有结构性,其变形过程必然伴随着结构的破坏。提出了一种新型的堆砌体模型,用以描述这种结构破坏现象。这一模型反把变形过程中的结构性土看作不同大小土块的集合体,总的变形将由土块的弹性变形、土块之间滑动引起的塑性变形和土块破碎引起的损伤变形三部分组成。塑性变形常用屈服函数描述,损伤变形则可以引入一种类似的损伤函数加以描述。推导了相庆的庆力庆变关系式并提出了模型参数的测定方法。
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| 关 键 词： | 结构性粘土 本构模型 屈服函数 堆砌体模型 |
| 收稿时间： | 1999-07-05 |
| 修稿时间： | 1999-07-05 |
A masonry model for structured clays |
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| Shen Zhujiang.A masonry model for structured clays[J].Rock and Soil Mechanics,2000,21(1):1-4. |
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| Authors: | Shen Zhujiang |
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| Institution: | Nanjing Hydraulic Research Institute, Nanjing 210029, China |
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| Abstract: | Natural clays have their structure which must be destroyed
during the deformation process. In this paper a new kind of constitutive model capable to
describe the damage of soil structure has been proposed. A structured clay in this model
is regarded as an assembly of lumps of different sizes, and it is assumed that the total
deformation consists of 3 parts, i.e. elastic deformation of lumps, plastic deformation
due to sliding between lumps and irrecoverable deformation due to crushing of lumps.
Usually yield function is introduced to describe the plastic deformation, however, a new
damage function is proposed here to describe the additional deformation due to the damage
of soil structure. Finally, a stress-strain relationship expressed in incremental form is
formulated and a procedure is suggested to determine the model constants. |
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| Keywords: | structured clay constitutive modeling yield function damage function |
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