摘要
根据聚苯乙烯轻质混合土单轴应力—应变曲线和三轴应力—应变曲线的形态 ,得出水泥掺入比、密度、含水率、龄期等对聚苯乙烯轻质混合土变形特性有不同程度的影响 ;在围压作用下 ,曲线类型为应变硬化型 ,围压不同 ,主应力差大小不同。基于试验结果 ,得出聚苯乙烯轻质混合土单轴应力应变关系符合双曲线模型 ,三轴应力应变关系符合弹性 -线性强化模型 ,并对应力应变曲线进行拟合。
The influences of cement content, density, water content and age on the deformation behavior of the light heterogeneous soil are studied based on the uniaxial and triaxial stress-strain curves. The type of stress-strain curves is that of strain hardening with different cell pressures, but the principal stress difference varies with variation of confining pressure. The results of tests indicates that a hyperbolic model and a flexible-linear hardening model can reasonably simulate the stress-strain relations under uniaxial and triaxial stresses conditions respectively.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2004年第5期579-583,共5页
Chinese Journal of Geotechnical Engineering
关键词
应力应变曲线
软化
硬化
双曲线模型
弹性-线性强化模型
stress-strain curve
strain softening
strain hardening
hyperbolic model
flexibility-linear hardening model
