XUE R, TIAN Z L, ZHAO W T, et al. Seismic performance analysis of corroded reinforced concrete beam–column joints[J]. Journal of Henan Polytechnic University( Natural Science) , doi: 10.16186/j.cnki.1673-9787. 2025110031.

doi: 10.16186/j.cnki.1673-9787. 2025110031

Received： 2025-11-23

Revised： 2026-01-13

Online： 2026-03-16

Seismic performance analysis of corroded reinforced concrete beam–column joints(Online)

XueRu¹，TianZilong¹，ZhaoWentong¹，YueYaxin²，WangZhiyuan²，ZhangTao¹

1. School of Civil Engineering and Architecture，Zhengzhou University of Aeronautics，Zhengzhou 450046，Henan， China; 2. School of Civil Engineering，Xi’an University of Architecture and Technology，Xi’an 710055，Shaanxi， China

Abstract: Objectives Reinforcement corrosion is a primary cause of durability deterioration in reinforced concrete (RC) structures and has a particularly pronounced effect on beam–column joints, the critical components of frame systems. This study systematically investigates the mechanical mechanisms and performance degradation of beam–column joints under corrosion. Methods Four full-scale RC beam–column joint specimens were designed and fabricated. Different reinforcement corrosion levels in the joints were produced by an electrochemical accelerated corrosion method under dry–wet cycling. Low-cycle reversed loading tests were carried out to examine the joints’ hysteretic behavior and failure characteristics. On this basis, the shear-panel parameters in the BCJE model were revised,and a finite element model for corroded RC joints was established and validated against the experimental results. Further parametric studies were then performed to explore the combined effects of axial compression ratio, stirrup corrosion level, transverse reinforcement ratio and concrete strength on the seismic performance of corroded joints. Results Rebar corrosion significantly reduces the load-carrying capacity and ductility of the joints, increases the bond–slip deformation of longitudinal reinforcement, decreases the proportion of shear deformation in the core region, and shifts the failure mode from core-panel shear failure to brittle beam-end failure. The modified BCJE model accurately captures the hysteretic behavior of corroded joints, showing good agreement with the experimental results. Parametric analyses indicate that stirrup corrosion rate is the most detrimental factor to joint performance, while the axial load ratio exhibits a dual effect: moderate increase enhances peak shear strength, but also results in a steeper descending branch of the skeleton curve, leading to more brittle failure characteristics. Conclusions This study clarifies the deterioration mechanisms of RC beam–column joints subjected to rebar corrosion and provides a useful reference for the seismic design and durability assessment of RC structures in marine environments.

Key words: RC beam-column joints; reinforcement corrosion; BCJE model; finite element simulation; seismic performance