中文摘要：

已有文献指出,钢筋混凝土偏压柱的弯矩增大系数与含筋率有关,而我国结构设计规范中弯矩增大系数的计算不考虑含筋率的影响.为此,在收集的33根试件资料基础上,结合所开展的有限元分析,进行了理论分析,同时开展有限元参数分析。结果表明：弯矩增大系数计算式中的曲率影响系数不仅与长细比、偏心率有关,还与含筋率有关;在长细比、偏心率相同的情况下,含筋率越大,弯矩增大系数越大.根据分析结果,提出了考虑含筋率影响的曲率影响系数计算公式,应用收集到的文献试件验证了公式的计算精度.

英文摘要：

It is pointed out that moment enlargement coefficient of eccentrically loaded reinforced concrete column is related with reinforcement ratio which is not yet considered by China structural design specification.Therefore,based on 33 specimen test data from references and load-bearing capacity tests of 14 eccentricallyloaded reinforced concrete columns,theoretical and FEM parametric analysis were carried out. Results show that the curvature influence coefficient in the calculation formula of moment enlargement coefficient is not only related with slenderness ratio and eccentricity,but also with reinforcement ratio. Bending moment enlargement coefficient increases with reinforcement ratio under the condition of constant slenderness ratio and eccentricity.A calculation formula of curvature influence coefficient considering the effect of reinforcement ratio is put forward with its accuracy verified by specimen data from published papers.