Dynamic Compressive Damage Constitutive Correction of Concrete Under Freeze-Thaw Cycle

In order to investigate the uniaxial dynamic compression constitutive model for concrete under freeze-thaw conditions, a finite element analysis was employed to model the temperature field of the concrete. The resulting data were subsequently integrated into the thermal stress field as a predefined parameter for a sequentially coupled thermal stress analysis. Following this, a numerical simulation was performed to assess concrete damage progression during a dynamic compression test in a freeze-thaw setting. The constitutive model was developed by adjusting the parameters that govern the development of concrete damage within the uniaxial stress-strain relationship, as specified in the Code for Design of Concrete Structures. The uniaxial compression behavior of concrete subjected to freeze-thaw was simulated utilizing both the modified intrinsic model and the damage plasticity model available in the software while accounting for the effects of the damage factor. The findings indicate that the modified constitutive model aligns closely with the actual experimental results. These research outcomes have potential applications in numerical simulations and various engineering practices related to concrete.