An improved creep model for unsaturated reticulated red clay

作     者：Chuang Zhang Junhui Zhang Jianzhong Li Chuang Zhang;Junhui Zhang;Jianzhong Li

作者机构：Key Laboratory of Special Environment Road Engineering of Hunan ProvinceChangsha University of Science and TechnologyChangsha410114China School of Traffic and Transportation EngineeringChangsha University of Science and TechnologyChangsha410114China Department of Architecture and Civil EngineeringCity University of Hong KongChina School of Geosciences and Info-PhysicsCentral South UniversityChangsha410083China 

出 版 物：《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报（英文）)

年 卷 期：2024年第16卷第11期

页      面：4754-4768页

核心收录：

学科分类：08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Science Fund for Distinguished Young Scholars (Grant No.52025085) the National Key Research and Development Program of China (Grant No.2021YFB2600900) the Open Fund of Key Laboratory of Special Environment Road Engineering of Hunan Province,China (Changsha University of Science and Technology) (Grant No.kfj230606) 

主　　题：Fractional calculus Creep model Burgers Parameter study Unsaturated reticulated red clay 

摘      要：Establishment of a creep model is an important method to analyze the relationship between soil creep deformation and time,and the element model is widely used for studying soil ***,the element creep model is employed for fitting saturated soil,and the mechanical element model is generally linear,which cannot well fit the nonlinear deformation of the soil with time in *** creep process of the soil is not only time-dependent,but also related to the deviatoric stress ***,the fractional calculus theory and a parameter n reflecting the effect of deviatoric stress level on the creep properties of the soil were introduced into the element model,and the fractional qBurgers creep model was established by using the fractional Koeller dashpot and Caputo fractional *** proposed model was used to fit the triaxial test data of reticulated red clay under different net confining pressures and matric suctions by unsaturated triaxial *** proposed model can well describe the nonlinearity of unsaturated reticulated red clay,has memory and global correlation to the creep development process of unsaturated reticulated red clay,and has clear physical *** functional relationships of the model parameters with the matric suction,net confining pressure and deviatoric stress level were deduced,so that the creep curves of unsaturated reticulated red clay can be obtained for any conditions,which is of great value for the study of unsaturated soils.