Abstract:Based on the uniaxial compression test results of sulfate erosion concrete, a revised model was established by considering damage evolution parameter to uniaxial compression constitutive model of non-corrosion concrete in the Code for Design of Concrete Structures (GB50010-2010). Using the modified constitutive model and the plastic damage model of ABAQUS software, considering the influence of damage factors, the uniaxial compression behavior of concrete under the coupling effects of sulfate, drying-wetting cycle and freezing-thawing cycle was well simulated. Finite element simulation results show that as the increase of sulfate dry-wet cycles and of freeze-thaw cycles, the maximum damage factor of concrete and the damage range gradually increase. The maximum principal tensile stress continuously decreases, and compressive stress and equivalent plastic strain of the middle section increase gradually, and the failure of concrete becomes more serious. All samples fail under maximum tensile strain. The proposed finite element model can dynamically reflect the stress development and damage state of concrete with the change of parameter, and can be used to simulate the uniaxial compression behavior of concrete under the coupling effects of sulfate, dry-wet cycle and freeze-thaw cycle.