中南大学学报（自然科学版）2017，Vol.48Issue(5)：1360-1366,7.DOI:10.11817/j.issn.1672-7207.2017.05.031
干湿循环作用下长沙绕城高速公路粉质黏土的损伤特性
Damage characteristics of Changsha ring expressway silty clay during dry-wet cycle
摘要
Abstract
In order to obtain silty clay's damage characteristics of Changsha ring expressway during dry-wet cycle, soil degradation processes were analyzed based on the continuous damage mechanics and statistical theories. Assuming soil micro strength was normally distributed, dry-wet cycle damage variable was directly coupled to the statistical damage constitutive model. Then, the damage constitutive equation of soil was built under the effect of dry-wet cycle. Meanwhile, combing with the triaxial consolidated undrained test about Changsha ring expressway silty clay, the impact of dry-wet cycle on soil infinitesimal strength was analyzed. The results show that calculation results of statistical damage constitutive model about Changsha ring expressway silty clay during dry-wet cycle are accordance with the experimental results, and the degree of fitting is above 0.95. After one or two dry-wet cycle interactions, soil's infinitesimal strength will reduce to some extent, and then there will be small changes in amplitude. The discreteness of soil's infinitesimal strength is influenced by dry-wet cycle and tends to increase with cycles times.关键词
粉质黏土/干湿循环/本构模型/损伤特性Key words
silty clay/dry-wet cycle/constitutive model/damage characteristics分类
建筑与水利引用本文复制引用
李文,曾胜,赵健,刘盼..干湿循环作用下长沙绕城高速公路粉质黏土的损伤特性[J].中南大学学报（自然科学版）,2017,48(5):1360-1366,7.基金项目
交通运输部建设科技项目(2011318824350) （2011318824350）
国家自然科学基金资助项目(50208004) (Project(2011318824350) supported by the Construction of Science and Technology of Ministry of Transport （50208004）
Project(51374248) supported by the National Natural Science Foundation of China) （51374248）
