K_0固结黏土的渐近状态模拟  

ASYMPTOTIC STATE MODELLING FOR K_0 CONSOLIDATED CLAY

作　　者：罗汀[1] 郭敏[1] 

机构地区：[1]北京航空航天大学交通科学与工程学院,北京100191

出　　处：《工业建筑》2011年第9期35-37,112,共4页Industrial Construction

基　　金：国家自然科学基金项目(50879001;10872016);教育部博士点基金项目(20091102110030)

摘　　要：将正常固结土的渐近状态模型推广到K0固结土的渐近状态模型。推导出三轴压缩条件下耦合参量的求解公式,提出K0固结土的渐近状态模型中耦合参量关于应力Lode角的函数关系式,并用K0固结土的修正剑桥模型及K0固结土的渐近状态模型对多种黏土的三轴压缩、三轴伸长的试验结果进行预测对比。结果表明:K0固结土的渐近状态模型较K0固结土的修正剑桥模型能更合理地预测不同应力状态下K0固结土的应力-应变关系。Asymptotic State（AS） model for normally consolidated clay was extended to asymptotic state model for K0 consolidated clays. The formulation of partially coupled parameter was deduced under triaxial compression condition. A function of partially coupled parameter associated with Lode＇ s angle was proposed. Modified Cam-clay （MCC） model and AS model for Ko consolidated clay were applied to predict stress-strain relationship under triaxial compression and extension conditions. The comparison between predicted results showed that AS model for K0 consolidated clay was more reasonable in describing constitutive relations.

关 键 词：渐近状态 K0固结 耦合参量 应力-应变关系 

分 类 号：TU431[建筑科学—岩土工程]