正常固结黏土的三维弹塑性本构模型

杜修力; 马超; 路德春

doi:10.11779/CJGE201502004

正常固结黏土的三维弹塑性本构模型 English Version

杜修力^{1, 2},
马超^{1, 2},
路德春^{1, 2}

1. 北京工业大学城市与工程安全减灾教育部重点实验室,北京100124; 2. 北京工业大学建筑工程学院,北京 100124

基金项目: 国家自然科学基金项目（91215301,51278012,51421005）; 北京工业大学博士生创新奖学金资助项目（YB201406）

详细信息

作者简介:
杜修力(1962- ),男,长江学者特聘教授,博士生导师,主要从事地震工程方面的研究,E-mail: duxiuli@bjut.edu.cn。

中图分类号: TU47
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出版历程
- 收稿日期: 2014-03-02
- 发布日期: 2015-03-01

Three-dimensional elastoplastic constitutive model for normal consolidated clays

DU Xiu-li^{1, 2},
MA Chao^{1, 2},
LU De-chun^{1, 2}

1. Key Lab of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China; 2. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China

摘要

摘要: β应力空间内的非线性统一强度理论，与普通应力空间内的Drucker-Prager强度理论的形式相同。类比剑桥模型采用应力参量p和q的建模方法，在β应力空间内建立了土的三维弹塑性本构模型。首先提出了新的剪胀方程，结合正交条件，以p_s，q_s作为应力参量得到塑性势函数；其次模型建立过程中采用了修正剑桥模型的屈服面及非相关联流动法则；这种建模思路是一种新的直接建立三维弹塑性模型的方法。模型以岩土类材料的非线性统一强度理论为破坏条件，能够合理地反映岩土类材料的三维强度特性，较好地描述土体的变形特性，且能够退化为修正剑桥模型。
- 土 /
- 三维化 /
- 剪胀方程 /
- 塑性势函数
Abstract: The nonlinear unified strength theory in β stress space is similar to the Drucker-Prager strength theory in principal stress space. Compared with the establishment of Cam-clay model with stress parameters of p and q, a new three-dimensional elastoplastic constitutive model is established in β stress space. A new dilatancy equation is proposed, and then plastic potential function is obtained combined with the orthogonality condition. The new model is based on the nonassociated flow rule and yield function of modified Cam-clay model. It is a new idea to establish three-dimensional elastoplastic constitutive model directly. The proposed model in which the failure condition is based on nonlinear unified strength theory can reflect the deformation and strength characteristics of soils reasonably, and can be devolved into the Cam-clay model.
- soil /
- three-dimension /
- dilatancy equation /
- plastic potential function

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参考文献(18)

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