摘要
为了较好地模拟非饱和Q2原状黄土的剪胀性和软化性,进行了一系列非饱和Q2原状黄土室内试验,获得非饱和Q2原状黄土的物理及力学参数。结合应变空间的塑性力学理论,推导出Q2原状黄土的屈服函数和以塑性功为硬化参数的硬化规律。根据伊留辛公设和相关联流动法则,建立了应变空间的Q2原状黄土弹塑性本构模型。通过计算与试验实测值的比较,表明该本构模型能反映Q2原状黄土的剪胀性和软化性。
To research the mechanical characteristic of unsaturated intact Q2 loess,the mechanical parameters of unsaturated intact Q2 loess were derived entirely from the results of isotropic compression and convent ional triaxial compression tests.The yield function and the harden rule with plastic work as the hardening parameter were derived from the test results and the theory of soil plastic mechanics.The Elasto-plastic model of unsaturated intact Q2 loess was set up.The comparison between the measured and the predicted stress-strain and the volume change behavior of the unsaturated intact Q2 loess shows that the model predicts the shear compression and dilation with high accuracy.
出处
《解放军理工大学学报（自然科学版）》
EI
北大核心
2010年第3期316-321,共6页
Journal of PLA University of Science and Technology(Natural Science Edition)
基金
重庆市自然科学基金资助项目(CSTC
2009BB6350)
教育部"新世纪优秀人才支持计划"资助项目(NCET-05-0763)
关键词
Q2黄土
塑性功
硬化参数
屈服面
本构模型
intact Q2 loess
plastic work
hardening parameter
yield surface
constitutive model
