(重庆大学土木工程学院 400045)
［提要］ 论述了钢筋混凝土框架结构二阶效应的研究方法，从框架柱变形的角度出发，分析了有挠曲和侧移的框架柱的二阶效应，推导了考虑刚度折减的钢筋混凝土框架柱的二阶效应的解析法。在进行结构内力分析时，柱的各截面内力中可自动包括二阶效应，不需要再考虑弯矩增大系数，计算方便。
［关键词］ 钢筋混凝土 框架柱 二阶效应
Whole Considering of Secondorder Effect of Flexure and Displacement in RC Frame Column/ Cheng Guangjun,Yu Haixiang,Bai Shaoliang,Wu Jianhua(College of Civil Engineering, Chongqing University,Chongqing 400045,China)
Abstract:The current design procedures of secondorder effect for reinforced concrete frames are introduced. Based on the distortion of RC frame columns,it isanalyzed that the secondorder effect of both flexure and displacement in the frame columns.An analytical method for the solution of secondorder effect considering the degradation of stiffness in reinforced concrete frames is presented.When calculating  internal forces of the structure,the internal forces in each section of the column contain the secondorder effect automatically.So it is convenient to calculate the internal forces,because the enlarging factor
 does not need to be considered.
Keywords:reinforced concrete;frame column;secondorder effect