摘要
Lade双屈服面模型存在一些缺陷,表现在其剪切屈服面和体积屈服面在π平面上的投影形状不同,不能实现密闭连接,这违背了屈服面在应力空间中是外凸封闭的曲面这一基本原理。基于这一点,该文先从理论与实验角度证实了这一缺陷,随后对Lade体积屈服面模型进行了合理地修正,并通过松的Sacramento河砂实验结果检测了这一修正;同时也建议了另一合理形式的体积屈服面。将Lade修正体积屈服面或另一合理形式的体积屈服面与Lade剪切屈服面结合在一起,可以更合理地研究土体的应力与应变特性。
In the double yield surface model proposed by Lade, the projection of shear yield surface and that of volume collapse yield surface are significantly different on πplane. This deficiency is discussed theoretically and experimentally, then a modified Lade volume collapse yield surface is suggested, which is further examined by testing results. Meanwhile, another reasonable volume collapse yield surface is also recommended. Thus stress and strain characteristics of soil mass could be predicted reasonably by the combined Lade shear yield surface with the modified Lade collapse yield surface or with the recommended collapse yield surface.
出处
《工程力学》
EI
CSCD
北大核心
2009年第11期41-45,共5页
Engineering Mechanics
关键词
剪切屈服面
体积屈服面
角隅函数
塑性功
功硬化定理
shear yield surface
volume collapse yield surface
ridge function
plastic work
work hardening law
