超高层结构钢管柱计算长度的分析探讨
- 摘 要
-
（广东省建筑设计研究院，广州510010）[摘要]针对超高层框筒结构中圆钢管混凝土柱的计算长度系数，分别采用无侧移框架柱、有侧移框架柱和欧拉公式三种方法进行计算。对比分析结果表明，结构上部框架柱的计算长度系数按照无侧移框架柱计算，结果偏不安全；采用有侧移框架柱计算，结果远大于另外两种方法的计算结果，过于保守。本文建议根据结构屈曲模态和欧拉公式计算钢管柱的等效计算长度，并以该长度的2倍作为钢管柱承载力设计中的计算长度。[关键词]圆钢管混凝土柱;二阶效应;计算长度系数;欧拉公式中图分类号：TU398 文献标识码：A 文章编号：1002-848X(2013)S1-0418-04作者简介：焦柯，教授级高级工程师，Email：gscad@21cn.com。Discussion on calculated length of steel tube concrete column of high-rise building structuresJiao Ke, Wu Guiguang（The Architectural Design and Research Institute of Guangdong Province,Guangzhou 510010,China）Abstract: Three methods about calculated length coefficient of round steel tube concrete column of high-rise frame-core wall structure are discussed, including non-sway frame, sway frame and the Euler formula. Contrastive analysis result shows comparatively insecurity if the calculated length coefficient of frame column of upper structure is calculated by non-sway frame. But the result is greater than the other two methods if the calculated length coefficient of frame column is calculated by sway frame. Basing the structural buckling mode and the Euler formula to calculate the calculated length, and using the doubled calculated length as actual calculated length in the design of bearing capacity of steel tube concrete column are suggested.Keywords: round steel tube concrete column;second order effects;calculated length coefficient;Euler formula
