The process of determining the finite element viscoelastic model of polyurethane joint filler for cement concrete joints was studied.Firstly,strain scanning was performed on polyurethane sealant using DSR to determine the linear elastic range.Then,stress was selected within the range for stress relaxation testing to obtain a multi temperature stress relaxation modulus curve.The appropriate model in ANSYS software for curve was also selected fitting of the experimental data.The finite ele-ment generalized Maxwell model and the material viscoelastic parameters inputted in Prony series form were obtained.Then a regression formula is established for temperature mechanical parameters and vis-coelastic mechanical parameters for other temperatures were derived.
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