Dynamic Tensile Damage Constitutive Correctio n of Concrete Under Freeze–Thaw Cycle

Abstract To study the uniaxial dynamic tensile constitutive model of concrete under freeze–thaw conditions, the temperature field of concrete is modeled using finite element analysis software. The results are then imported into the thermal stress field as a predefined field for sequential coupled thermal stress analysis. Subsequently, a numerical simulation analysis of a dynamic tensile test under a freeze–thaw environment was conducted to ascertain the evolution of concrete damage. The constitutive model was established by correcting the concrete damage evolution parameters in the uniaxial stress–strain relationship of concrete as outlined in the Code for Design of Concrete Structures. The uniaxial tensile behavior of concrete under the action of freeze–thaw cycles was simulated using the modified intrinsic model and the damage plasticity model included in the software, taking into account the influence of the damage factor. The results demonstrate that the modified constitutive model aligns well with the actual experimental results. The research findings can be utilized in numerical simulations and concrete-related engineering applications.