Akademik Veri Yönetim Sistemi
Journal of Building Engineering, cilt.120, 2026 (SCI-Expanded, Scopus)
This study develops an enhanced nonlinear finite element (FE) model to investigate the impact behavior of reinforced concrete (RC) beams with varying longitudinal reinforcement ratios and corrosion damage under different impact energy levels. The model, implemented in LS-DYNA and incorporating strain-rate effects, corrosion-induced reductions in reinforcement cross-sectional area and yield strength, degradation of concrete compressive strength, and bond–slip deterioration at the steel–concrete interface, is validated against experimental data from the literature in terms of peak impact force, displacement response, and energy absorption. Following validation, a comprehensive parametric study is conducted on twelve RC beams with two reinforcement ratios, two corrosion levels, and three impact energies. The numerical results show that corrosion markedly increases maximum and residual displacements, accelerates stiffness degradation, and amplifies damage accumulation. At the same time, higher reinforcement ratios enhance impact stiffness, limit crack propagation, and improve post-impact recovery. Peak impact force is relatively insensitive to corrosion and reinforcement ratio, whereas displacement-, stiffness-, and damage–index–based parameters provide a more unambiguous indication of deterioration. Crack patterns obtained from effective plastic strain contours further reveal a transition from predominantly flexural failure to mixed flexural–shear mechanisms with increasing impact energy and corrosion severity. Overall, the findings highlight the critical role of corrosion and reinforcement detailing in governing the dynamic response of RC beams under impact loading and underscore the need to use stiffness- and deformation-based indicators, rather than force alone, in the assessment and design of corrosion-damaged members.