Principles of Modeling the Work of Damaged Columns Made of Compressed Reinforced Concrete

The article presents the results of computer modeling of damaged test samples. Experimental elements in the form of H-shaped reinforced concrete columns subjected to eccentric compression were utilized. Damage was induced through three variables: depth, inclination angle, and length of damage. A three-level three-factor Box-Behnken plan has been created, resulting in statistically substantiated results within the variation of variable factors, using only 15 experimental columns. Samples of compressed elements were manufactured and tested as per the experimental plan. The stress-strain state of reinforced concrete columns is described, and the impact of damage on bearing capacity is established. The modeling of experimental samples was carried out within the software complex “LiraSAPR.” Recommendations are provided concerning the procedure for model implementation and calculation. The obtained modeling results were analyzed, and their convergence with experimental data was established, showcasing a high level of agreement. Significant convergence between the results of computer modeling using the software complex and experimental data was observed. Recommendations for creating models of H-shaped reinforced concrete columns subjected to eccentric compression are offered.