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(重慶大學(xué)土木工程學(xué)院 400045)
［提要］ 論述了鋼筋混凝土框架結(jié)構(gòu)二階效應(yīng)的研究方法，從框架柱變形的角度出發(fā)，分析了有撓曲和側(cè)移的框架柱的二階效應(yīng)，推導(dǎo)了考慮剛度折減的鋼筋混凝土框架柱的二階效應(yīng)的解析法。在進(jìn)行結(jié)構(gòu)內(nèi)力分析時(shí)，柱的各截面內(nèi)力中可自動包括二階效應(yīng)，不需要再考慮彎矩增大系數(shù)，計(jì)算方便。
［關(guān)鍵詞］ 鋼筋混凝土 框架柱 二階效應(yīng)
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