This work aims to investigate the thermo-poromechanical behavior of saturated silt clay(SC)under varying temperatures through experiments and constitutive modeling.A series of undrained triaxial compression tests was ...This work aims to investigate the thermo-poromechanical behavior of saturated silt clay(SC)under varying temperatures through experiments and constitutive modeling.A series of undrained triaxial compression tests was conducted on saturated SC with temperature ranges from 25℃to 60℃.The effects of temperature on the main poromechanical properties of saturated SC,such as stress-strain relations,pore pressure evolution,and strength parameters,were thoroughly examined.Based on the experimental results,a subtly thermodynamically consistent thermo-poromechanical model was established using the concept of effective plastic stress within the poromechanical framework.Plastic deformation was described with a specific yield criterion and non-associated plastic potential that both depend on the effective plastic stress and a simple hardening variable.Finally,this model was implemented by a semi-implicit return mapping algorithm(SRMA)and validated through the comparison of model predictions and experimental data.The proposed model accurately reproduces the main thermo-poromechanical characteristics observed in saturated SC.展开更多
基金supported by the National Natural Science Foun-dation of China(Grant No.52478335)the 2023 Annual Science and Technology Project of Jiangsu Province Construction System(Grant No.90)the Science and Technology Research and Develop-ment Topic of CSCEC 7th Division(Grant No.CSCEC7b-2024-Z-4).
文摘This work aims to investigate the thermo-poromechanical behavior of saturated silt clay(SC)under varying temperatures through experiments and constitutive modeling.A series of undrained triaxial compression tests was conducted on saturated SC with temperature ranges from 25℃to 60℃.The effects of temperature on the main poromechanical properties of saturated SC,such as stress-strain relations,pore pressure evolution,and strength parameters,were thoroughly examined.Based on the experimental results,a subtly thermodynamically consistent thermo-poromechanical model was established using the concept of effective plastic stress within the poromechanical framework.Plastic deformation was described with a specific yield criterion and non-associated plastic potential that both depend on the effective plastic stress and a simple hardening variable.Finally,this model was implemented by a semi-implicit return mapping algorithm(SRMA)and validated through the comparison of model predictions and experimental data.The proposed model accurately reproduces the main thermo-poromechanical characteristics observed in saturated SC.
