中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2012, Vol. 31 ›› Issue (6): 1105-1108.DOI: 10.3969/j.issn.1674-0696.2012.06.02

• • 上一篇    下一篇

变截面开口薄壁钢箱稳定性分析

刘芳平1,2,周建庭1   

  1. 1.重庆交通大学 土木建筑学院,重庆 400074; 2. 重庆三峡学院 土木工程学院,重庆 404000
  • 收稿日期:2011-12-08 修回日期:2012-03-05 出版日期:2012-12-15 发布日期:2014-10-31
  • 作者简介:刘芳平(1981—),男,甘肃陇西人,讲师,博士研究生,主要从事桥梁设计理论与工程控制方面的研究E-mail:115090140@qq.com。
  • 基金资助:
    重庆市重大科技攻关基金项目( CSTC2009AB6149) ; 重庆市杰出青年基金项目( CSTC2008BA6038)

Stability Analysis of Open Thin-Walled Steel Box with Variable Cross-Section

Liu Fangping1,2,Zhou Jianting1   

  1. 1School of Civil Engineering & Architecture,Chongqing Jiaotong University,Chongqing 400074,China;2School of Civil Engineering,Chongqing Three Gorges University,Chongqing 404000,China
  • Received:2011-12-08 Revised:2012-03-05 Online:2012-12-15 Published:2014-10-31

摘要: 从薄板基本理论出发,利用单块板的平衡状态,将基本方程建立在变形后的结构上,用假想荷载法推导出了薄壁构件弯扭平衡微分方程; 以变截面开口薄壁钢箱为研究对象,用有限元软件ANSYS 对大量不同尺寸的结构进行了屈曲分析。研究发现: 受竖向均布荷载作用下变截面悬臂开口薄壁钢箱有3 种基本屈曲形态,即板件的局部屈曲、截面的畸变屈曲和构件的整体屈曲; 随着结构尺寸的变化,一阶屈曲形式也在发生变化,并且呈一定的规律。

关键词: 薄壁钢箱, 假想荷载法, 稳定性, 屈曲

Abstract: The balance differential equations of bending and torsion of the thin-walled component were derived from notional load technique method,on the base of the deformed structure and the equilibrium of a single plate. On the other hand,a large number of different bucklings with open thin-walled steel box with variable cross-section are analyzed by using finite element program ANSYS.It is concluded that,by vertical uniform loads,the cantilever thin-walled steel box which has open and variable cross-section has three basic forms of buckling,that is,the local buckling of plate,distortion buckling of cross-section and overall buckling of the component. With the change of structural size,first-order buckling form also changes in certain rules.

Key words: thin-walled steel box, notional load technique method, stability, buckling

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