长江科学院院报2012，Vol.29Issue(11)：77-81,86,6.DOI:10.3969/j.issn.1001-5485.2012.11.017
延安Q2黄土三轴蠕变特性试验研究
Triaxial Test on the Creep Characteristics of Q2 Loess in Yan' an
摘要
Abstract
Triaxial creep tests are performed on Yan' an Q2 loess to obtain the triaxial creep curves and stress-strain isochronous curves under different water contents and confining pressures. Analysis on the curves reveals that stress magnitude, confining pressure and water content has great impact on the creep characteristics of Yan' an Q2 loess, and when the stress is higher than the sample' s yield stress, obvious nonlinear creep characteristic is found. The visco-elasticity-plasticity creep model of the loess is established by analogy in line with the modeling theory and the test results. On the basis of these, the visco-elasticity-plasticity constitutive creep model of the loess considering instantaneous damage is established, and the relevant parameters are fitted by Quasi-Newton method. The applicability of this constitutive model is verified by comparison between theoretical curve and experimental curve. The research results are of theoretical and practical value for the geotechnical engineering in the loess plateau.关键词
延安Q2黄土/三轴蠕变试验/蠕变特性/蠕变本构模型Key words
Yan' an Q2 loess/ triaxial creep test/ creep characteristics/ creep constitutive model分类
建筑与水利引用本文复制引用
赵宪民,段钊,何青峰,宋飞..延安Q2黄土三轴蠕变特性试验研究[J].长江科学院院报,2012,29(11):77-81,86,6.基金项目
国家自然科学基金资助项目(40875215) （40875215）
长安大学中央高校基本科研业务费专项资金资助项目(CHD2010JC118) （CHD2010JC118）
