RC 기둥의 단조 뼈대 곡선 예측을 위한 해석 모델 제안

Abstract

This study proposes a numerical modeling approach to estimate the monotonic backbone curve of reinforced concrete (RC) columns based on cyclic loading tests. Backbone curves derived from cyclic loading tests tend to underestimate deformation capacity, leading to inaccurate predictions of post-peak behavior. To address this limitation, the IMKPinching model is adopted, with post-peak deformation capacity treated as a key parameter. A procedure is proposed to estimate the parameters of a monotonic backbone curve from cyclic data. The proposed approach was validated by comparing with monotonic test results, demonstrating a significant improvement in post-peak prediction accuracy.