修正Cam模型与Lade-Duncan屈服准则的合理耦合

广东工业大学学报 ›› 2008, Vol. 25 ›› Issue (3): 90-94.

修正Cam模型与Lade-Duncan屈服准则的合理耦合

广东工业大学建设学院；

出版日期:2008-07-01 发布日期:2008-07-01

Combination of Modified Cam-clay Model and Lade-Duncan Yield Criterion

Faulty of Construction,Guangdong University of Technology,Guangzhou 510006,China

Online:2008-07-01 Published:2008-07-01

摘要/Abstract

摘要： 修正Cam模型成功地柔合进了临界状态概念,是描述正常固结土体应力与变形关系特性最为主要和奠基性的模型,也是其它土体弹塑性模型发展的基础.修正Cam模型在π平面上的投影是一个圆,这不符合众多岩土类材料在π平面上的屈服和破坏轨迹的实验事实;而在三维应力状态下,Lade-Duncan破坏准则能对岩土类材料在π平面上的强度与摩擦特性给出合理的描述.基于这种认识,提出了Lade-Duncan破坏准则与修正Cam模型相结合的模型(Cam-Lade模型),并通过实验资料,验证了该模型的合理性.

关键词: 屈服准则；临界状态线；剑桥模型；本构关系；孔隙水压力；

Abstract: Modified Cam-clay model in which the critical state concept is applied successfully,is the most important constitutive model to describe stress and strain relationship of soil mass,and it also is a foundation for developing a more advanced constitutive model.The projection of the modified Cam-clay model on plane is a circle,which does not agree with experimental observation of yield and failure traces of geomaterials on π plane.In three dimensional stress states,it is well known that Lade-Duncan...

Key words: yield critersion； critical state line； Cam-clay model； constitutive relationship； void water pressure；

杨雪强；张建龙；刘勇健； . 修正Cam模型与Lade-Duncan屈服准则的合理耦合[J]. 广东工业大学学报, 2008, 25(3): 90-94.

Yang Xue-qiang,Zhang Jian-long,Liu Yong-jian. Combination of Modified Cam-clay Model and Lade-Duncan Yield Criterion[J]. Journal of Guangdong University of Technology, 2008, 25(3): 90-94.

参考文献

[1] 杨雪强,朱志政,何世秀. 对Lade-Duncan,Matsuoka-Nakai和Ottosen等破坏准则的认识[J]. 岩土工程学报. 2006(03)

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