This calculator implements an improved calibration method for the K&C (Karagozian & Case) Concrete Damage Model specifically for Steel-Fiber Reinforced Concrete (SFRC).
Based on: Lee S, Park GK, Cho JY, Han BC. An improved calibration method of the K&C model for modeling steel-fiber reinforced concrete. Composite Structures. 2021;273:114010. doi:10.1016/j.compstruct.2021.114010
Valid Ranges: f'c = 20-130 MPa, Vf = 1-2%, hooked-end and straight steel fibers tested with various aspect ratios (l/d).
Note: This calibration provides better agreement with SFRC test data for both static and dynamic loading conditions. Results should be validated against experimental data for critical applications.
📐 Unit System: mm-s-tonne-N-MPa (MPa for pressure/stress, ton/mm³ for density)
Lee S, Park GK, Cho JY, Han BC. An improved calibration method of the K&C model for modeling steel-fiber reinforced concrete. Composite Structures. 2021;273:114010.
🔗 https://doi.org/10.1016/j.compstruct.2021.114010
This method modifies the K&C model's strength surfaces and damage function calibration to account for steel fiber reinforcement effects on compressive and tensile behavior, including dynamic increase factors for both compression and tension.