Study on numerical simulation of three-dimensional viscoelastic mechanics for steel deck asphalt pavement

Three dimensional viscoelastic mechanics theory of asphalt mixture was used in this paper based on the UMAT function of ABAQUS and numerical analysis of three-dimensional viscoelastic constitutive applying on steel deck asphalt pavement was realized. A large piece of linear track accelerated loading facility MLS66 was used to conduct a two million times repeated loading test on the testing bridge. Three-dimension FE model of the bridge is used in simulation. Three-dimensional viscoelastic constitutive model was applied for the asphalt pavement and a static equivalent loading scheme was utilized for the two million times repeated loading. By comparing the accelerated loading test measured data with finite element numerical simulation results, a rather good agreement between measured and numerically predicted strains can be obtained that verifies the reasonableness and practicability of the FE model. This provides an effective method for further mechanical analysis of steel bridge deck asphalt layer.