变截面箱形轴压柱稳定性能研究  

STUDY ON STABILITY OF VARIABLE CROSS-SECTION BOX COLUMN

作　　者：易成[1] 许瑞[2] 吴耀华[2] 

机构地区：[1]中国矿业大学,北京100083 [2]中国京冶工程技术有限公司,北京1000088

出　　处：《钢结构》2007年第12期27-30,共4页Steel Construction

基　　金：国家自然科学基金(Nd:50478077)。

摘　　要：为了全面掌握变截面箱形轴压柱的稳定性能以及各种参数对其稳定性能的影响,采用有限元软件AN- SYS对箱形变截面柱进行弹性整体屈曲分析.考虑其楔率和截面长宽比对其特征值屈曲性能的影响;在此基础上对其进行考虑双重非线性和残余应力的全过程极限承载力分析.并结合现行的钢结构规范提出箱形变截面柱的稳定承载力验算公式。In order to comprehensively grasp stable performance of variable cross-section box column and influence of various parameters on its stable performance,considering the effect of web tapering radio and section＇s ratio of length to width on variable cross-section box column eigenvalue buckling, it is analysed its elastic overall buckling by finite element software ANSYS. On the basis of which it is also analysed its ultimate load-carrying capacity by considering double nonlinear and residual stress. Based on ＂Code for Design of Steel Structures＂, the design formula for variable cross-section box column is proposed.

关 键 词：箱形变截面柱 特征值屈曲 极限承载力 楔率 长宽比 

分 类 号：TU391[建筑科学—结构工程]