In order to establish a nonlinear stress dependent constitutive model of asphalt treated base

incorporate it into mechanical pavement analysis and improve the accuracy of pavement structural analysis

the dynamic triaxial test was used to measure the resilient modulus of asphalt treated base in different stress state. The nonlinear stress dependent constitutive model was obtained. The finite element pavement analysis was carried out

and the material property was defined through user programed UMAT subroutine. The testing results show that

the resilient modulus of asphalt treated base has a strong stress dependent property. Within the stress state covered in the triaxial test

the maximum resilient modulus is 175% of the minimum value. From the finite element pavement analysis

compared to nonlinear analysis

the traditional linear elastic analysis underestimates the maximum tensile strain on the bottom of base about 10%

and underestimates the maximum compressive stress on the top of subbase about 5%. The pavement analysis results are significant affected by the stress dependent property and it needs to be included during pavement design process.