- 摘 要
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(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 Secondorder 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 secondorder effect for reinforced concrete frames are introduced. Based on the distortion of RC frame columns,it isanalyzed that the secondorder effect of both flexure and displacement in the frame columns.An analytical method for the solution of secondorder 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 secondorder 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;secondorder effect