对钢筋混凝土偏压杆件偏心距增大系数中截面曲率修正系数的讨论

Evaluation of Sectional Curvature Modification Factor Included in the Eccentricity Magnifier of RC Eccentrically Compressed Members

在分析小偏心受压状态下钢筋混凝土偏心受压构件由二阶效应引起的弯矩增大规律的基础上， 讨论了用于偏心距增大系数极限曲率表达式的反映小偏心受压状态下截面极限曲率变化规律的截面曲率修正系数的各种表达方案的物理含义及其优缺点， 为国家标准《混凝土结构设计规范》的修订提供决策依据。

On the basis of analyzing the characteristics of moment magnification caused by second_order effect in the RC compressed members with small eccentricity,the physical backgrounds,advantages and disadvantages of various curvature modification factor expressions reflecting variation of ultimate sectional curvature included in the eccentricity magnifier equation are presented.Suggestions are made for the revision of China National Standard “Code for Design of Concrete Structures”.