Abstract：The viscoelastic combination model usually has two forms. One is the form based on the Young’s modulus and the coefficients of tensile viscosity, the other is the form based on the shear modulus and the coefficients of shear viscosity. The conversion relationship between two types of parameters has been established for the Generalized Kelvin model. However, there still exists some problems such as the theoretical foundation is still relatively weak and the scope and conditions of application are not clear. Considering two kinds of three dimensional hypothesis commonly used in geotechnical engineering (constant Poisson's ratio hypothesis and constant volume modulus hypothesis), the conversion relationship between two types of parameters for creep compliance and complex compliance in viscoelasticity model is given based on the linear viscoelastic theory. Then the conversion relationship was applied to the generalized Kelvin model and the Poynting-Thomson model, and the conversion formulas between two types of parameters for these two models are established respectively. The scope and conditions of application for the conversion are put forward, and the problems are pointed out which should be paid attention to in practical engineering application in the end.
2020, Vol. 41 
