The characteristics of Nu-Mu curve and numerical analysis of eccentrically loaded RC columns with symmetric reinforcement
ZHOU Qing
GUO Wei
QI Lin
Abstract：To analyze the influence of parameters such as cross-sectional area,reinforcement ratio,steel bar strength,and concrete strength etc.,the relationship between the ultimate bending moment Mu and the ultimate axial force Nu(Nu-Mu)curve of eccentrically loaded reinforced concrete(RC)columns with symmetrical reinforcement,the functional relationship between Mu and Nu for symmetrically reinforced eccentrically loaded RC columns is derived and the Nu-Mu curve is plotted.Software ANSYS for numerical analysis of RC columns is used to analyze the errors between the numerical analysis results of the maximum ultimate bending moment and the maximum ultimate axial force of the column base section and the theoretical calculation results.The study finds that the ultimate axial force increases with the increase of cross-sectional area,reinforcement ratio,rebar strength,and concrete strength,with the cross-sectional area having the greatest influence,concrete strength and reinforcement ratio having a smaller influence,and steel bar strength having the smallest influence;the theoretical calculation results of the maximum ultimate axial force and maximum ultimate bending moment are both greater than the numerical analysis results;the error between the theoretical calculation results and the numerical analysis results of the maximum ultimate bending moment is bigger than that of maximum axial force,the former is approximately 10％,while the latter is approximately 5％.
Keywords：eccentrically loaded RC columnsymmetric reinforcementNu-Mu curveparameter analysisnumerical analysis
Publication Date：2024-09-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 91-98,103 )