A Structured UH Model
Based on the UH model,a structured UH model is formulated to express the constitutive relation of structured clay.The keynote of the work is presenting a moving normal compression line (MNCL) in void ratio-mean effect stress plan.The MNCL is a straight line parallel to and higher than the normal compression line (NCL) of reconstituted clay.The difference between the MNCL and the NCL is defined as structure potential.As structure decay,the MNCL gradually declines and finally achieves to the NCL when the structure decays completely.In considering the temporal stress history,the MNCL,instead of NCL,is referred to determine the quasi-over-consolidation stress.By adopting a simple law of the structure potential evolution,void collapse due to the structure decay can be described.In the structured UH model,only 2 more parameters than that of the Cam-clay model are introduced,which are respectively structure potential and its decay rate factor.Comparisons of the model predictions and tests results indicate that the structuredUH model is qualified in capturing the main behaviors of the structured clay.
structured clay constitutive relation structure decay plasticity UHmodel
Enyang Zhu Yangping Yao
Department of Civil Engineering Beihang University No.37 Xueyuan Road,Beijing,China,100191
国际会议
北京
英文
675-689
2012-10-15（万方平台首次上网日期，不代表论文的发表时间）