（1 中元国际工程设计研究院，北京 100089； 2 重庆大学土木工程学院，重庆 400030）

［摘要］选取剪跨比和弯扭比这两个影响平截面假定成立的主要参量，以截面应变误差及柱顶侧向位移误差作为平截面假定成立的定量判定依据，分别从截面层次和构件层次上对处于弹性阶段的异形柱平截面假定的适用性进行了探讨，得出了不同受力情况下平截面假定适用的最小剪跨比。

［关键词］异形柱；平截面假定；剪跨比；弯扭比

Applicable range of plane-section assumption in analysis of special-shaped RC columns

Chen Juan¹， Chen Tao²（1 China IPPR International Engineering Corporation，Beijing 100089，China；2 College of Civil Engineering，Chongqing University，Chongqing 400030，China）

Abstract:Shear span ratio and crankle ratio which affect the applicability of plane-section assumption in the analysis of special-shaped RC columns were selected. According to strain error of the section level and displacement error on the member level, the applicable range of plane-section assumption in the elastic analysis for T-shaped and cross-shaped RC columns was studied. The minimal shear span ratio in the applicable range of plane-section assumption in the elastic analysis of T-shaped and cross-shaped RC columns with different loading cases was presented.

Keywords:special-shaped column; plane-section assumption; shear span ratio; crankle ratio

作者简介：陈娟，硕士，工程师，一级注册结构工程师，Email:chenjuan@ippr.net。

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