摘要
详细地介绍了国际上近30才发展起来的具有独特建模思想的一类新型的散粒型土体本构建模理论——亚塑性本构理论。将该理论与经典的弹塑性理论进行比较后发现,亚塑性理论的本构表达式自动隐含了弹塑性理论中相对应的一些基本概念和假定,无需额外引入,因此增加了模型的客观性。以Gudehus-Bauer亚塑性模型为例,分析了模型在临界状态时的本构特征。此外,通过三轴试验和循环剪切试验的亚塑性数值模拟表明,亚塑性本构模型能很好地反映无黏性散粒型土体的非弹性、非线性及剪胀(剪缩)性等主要应力-应变特性。
A new type of constitutive theory for granular soil,hypoplastic constitutive theory which was originated in recent 30 years,is introduced in detail.Comparing with the elastoplatic theory,the hypoplastic constitutive expression has automatically implied some basic concepts and factitious assumptions,e.g.decomposition of elastic strain and plastic strain,yield function,hardening law,plastic potential,flow rule and so on.The critical state of Gudehus-Bauer hypoplastic model is analyzed.Besides,the numerical simulation of triaxial test and cyclic shear test were illustrated and the results show that the model can grasp the main mechanical properties of granular soil,e.g.anelasticity,nonlinearity,dilatancy and so on.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第9期1801-1806,共6页
Rock and Soil Mechanics
基金
科技部中奥政府间国际科技合作项目(No.WTZ-VII.A.1)
中国博士后科学基金资助项目(No.20070411015)
