曾庆响     （五邑大学土木工程系  江门 529020）

[提要]  在分析国内外文献资料的基础上，根据《混凝土结构设计规范》( GB50010-2002)规定的单向受弯构件正截面承载力计算方法，利用叠加原理，将双向受弯构件的计算转化为单向受弯构件计算，提出了适用于双向受弯构件且无须试算的截面设计方法，使复杂的计算过程得以简化。与公认的平截面法的计算结果比较表明，该方法可行，精度高。
[关键词]  钢筋混凝土  双向受弯构件  正截面承载力  叠加原理  设计方法

Based on analysis of reference data at home and abroad, according to the calculation method for normal section bearing capacity of reinforced concrete beam subjected to single bending in Code for design of concrete structures ( GB50010-2002) and superposition theorem, a convenient design method without trial-and-error procedure for normal section bearing capacity of reinforced concrete beam subjected to biaxial bending is established. lt is justified from the comparison to hypothesis of maintain plane sectional strain method that the design method is feasible and has high precision.
Keywords:  reinforced concrete;  biaxial bending member; superposition theorem;  design method