（昆明理工大学建筑工程学院  650051）
【提要】  针对地震作用方向对异形柱受力性能的影响进行了数值分析。分析结果表明，异形柱（尤其是L形柱）的不同平面布置，将会改变异形柱的不利地震作用方向以及结构的承载性能。建议整体计算必须考虑地震作用方向的影响；有斜交抗侧力构件的异形柱结构，除了考虑两个主轴方向的水平地震作用和±45°地震作用方向外，还应计入各抗侧力构件方向、与斜交抗侧力构件呈±45°地震作用方向的计算。异形柱宜采用等肢截面，平面布置宜简单、规则，以免增加多组地震作用方向的验算。
【关键词】  异形柱  截面特性  平面布置  不利水平地震  作用方向
Plane Layout Required by RC Structure with Special Shaped Columns/He Ling，Yang Zhenghai，Pan Wen（Faculty of Civil Engineering and Architecture，Kunming University of Science and Technology， Kunming 650051，China）
Abstract:The effect on loadcarrying properties of specialshaped columns in different earthquake action directions is studied by numerical analysis. The research indicates that the plane layout with specialshaped columns （especially in Lshaped columns） will change disadvantageous direction of horizontal earthquake and structure loadcarrying properties. It is suggested that the effect of earthquake directions shoud be considered in global analysis.Not only two principal axis directions and the directions of ±45° should be taken into account in such type structures with oblique construction member to resist force，but also the calculation of every direction of construction member and of ±45° should be checked.Specialshaped columns should use equalleg crosssection and the plane layout should be simple and regular，for avoiding to add the calculation of multigroup earthquake action directions.
Keywords:section characters；special shaped column； plane layout；disadvantageous direction；horizontal earthquake