崔家春^1,3，周健²，杨联萍^1,3，王洪军²，李承铭¹

（1 上海现代建筑设计（集团）有限公司，上海 200041； 2 华东建筑设计研究院有限公司，上海 200002；3 同济大学建筑工程系，上海 200092）

 

［摘要］Y形柱是机场航站楼屋盖支承体系中常采用的一种构件形式，作为主要承重构件，其稳定性决定了屋盖结构的整体承载能力。利用荷载-位移全过程跟踪技术，考虑几何非线性、材料非线性和初始几何缺陷，研究了在竖向和水平风、地震作用下薄壁Y形柱的稳定性。研究表明：竖向荷载作用下Y形柱以分叉段平面外屈曲为主要失稳模式；Y形柱对初始几何缺陷不敏感；水平风荷载对Y形柱稳定性不起控制作用；竖向和水平荷载作用下，发生面外失稳前柱子分叉处已经进入塑性变形，柱子强度问题先于整体失稳。

［关键词］Y形柱；整体稳定；非线性分析；初始几何缺陷

中图分类号：TU311-2，TU393-3文献标识码：A文章编号：1002-848X(2012)05-0115-04

 

Cui Jiachun^1,3, Zhou Jian², Yang Lianping^1,3, Wang Hongjun², Li Chengming¹

(1 Shanghai Xian Dai Architectural Design (Group) Co., Ltd., Shanghai 200041, China; 2 East China Architectural Design & Research Institute Co., Ltd., Shanghai 200002, China; 3 Department of Building Engineering, TongjiUniversity, Shanghai 200092, China)

 

Abstract: Y-shaped column is common used as the main resistant structural system for roof in airports. As the main load bearing component, its stable capability directly affect the overall load bearing capability of the roof. Considering geometrical nonlinear, material nonlinear and initial geometrical imperfection, the stability performance of Y-shaped column under vertical and horizontal loads was studied using load-displacement track technology. Some conclusions are obtained: out-plane buckling of upper branch is the main buckling mode for Y-shaped column under vertical loads; Y-shaped column is not sensitive to initial geometrical imperfection; horizontal wind is not the control load for the stability of Y-shaped columns; plastic strain is found before instability under vertical and horizontal load, and strength ductility failure is more important than instability for Y-shaped columns.

Keywords: Y-shaped column; overall stability; non-linear analysis; initial geometrical imperfection

作者简介：崔家春，工程师，博士研究生，Email：jiachun_cui@xd-ad.com.cn。

 

［1］周健，丁生根，王洪军，等.南京禄口国际机场T2航站楼结构设计［J］.建筑结构，2012，42（5）：110-114.

［2］曾莹,罗永峰,沈祖炎,等.浦东机场航站楼Y型柱对屋盖整体稳定影响分析［J］.空间结构，2010,16(1):65-70.

［3］郭彦林,王永海,刘禄宇,等.广州新电视塔底部透空区外筒群柱面外稳定承载力试验研究［J］.建筑结构学报，2010,31(1):78-86,93.

［4］田伟,向新岸,赵阳,等. 考虑弯矩作用梭形钢格构柱稳定承载力非线性有限元分析［J］.建筑结构学报,2010,31(5):42-48.

［5］崔家春.世博轴阳光谷整体稳定性分析研究［J］.土木建筑工程信息技术,2011,3(1):73-78.

［6］沈世钊,陈昕.网壳结构稳定性［M］.北京:科学出版社,1999.

［7］JGJ 7—2010 空间网格结构技术规程［S］.北京:中国建筑工业出版社,2010.