岩土力学Issue(z2)：128-133,6.
黄土的修正上下加载面模型研究
Research on modified super-loading and sub-loading yield surface model of loess
摘要
Abstract
Collapse loess is a special structured soil because of its special sediment environments. When moisture and stress suffered from changing, macromechanical characteristics would change significantly. To analyze the stress-strain relationship changing laws and structural damage evaluations of loess under moisture and stress coupling effect, the sub-loading surface and super-loading surface ideas are introduced into soil constitutive model by Asaoka et al, in this paper, based on the original super-consolidation parameter and structural damage evaluation parameter, the effect of water content changing is considered in super-loading and sub-loading surface constitutive model;and new initial super-consolidation parameter and structural damage evaluation parameter are defined. Base on the sub-loading surface and super-loading surface ideas, the general stress-strain relationships are derived by introducing structural index and structure yield strength into constitutive model; at the same time, the effects of parameters are analyzed. Finally, the accuracy and rationality of the constitutive model proposed are verified by comparing with experimental results of collapse loess in oedometer tests and conventional triaxial tests conditions and calculating results of constitutive model proposed in this paper.关键词
上/下加载面/结构性黄土/损伤/本构模型Key words
sub-loading surface and super-loading surface/structured loess/damage/constitutive model分类
建筑与水利引用本文复制引用
罗爱忠,邵生俊,陈昌禄,方娟..黄土的修正上下加载面模型研究[J].岩土力学,2013,(z2):128-133,6.基金项目
国家自然科学基金项目（No.10872161，No.41272320）；黄土地区公路建设与养护技术交通行业重点实验室开放课题(No.KLTLR-Y12-3)；贵州省教育厅优秀科技创新人才项目([2012]096)。 （No.KLTLR-Y12-3）
