张登祥¹，李占杰²，B W Schafer²

（1 长沙理工大学水利工程学院，长沙 410076；2 美国约翰霍普金斯大学土木工程系，巴尔的摩 21218）

 

[摘要] 现有冷弯薄壁型钢设计规范中需要获知薄壁结构各个模态屈曲特性，如局部板件屈曲、畸变屈曲和整体屈曲。从工程设计需要出发，系统介绍约束有限元条分法的基础理论及进展，并着重阐述其在区分屈曲模态时的相关力学假设。对于由这些力学假设定义的模态是否正确，基于有限元静力分析从一个全新的角度验证其合理性。

[关键词] 冷弯薄壁构件；约束有限元条分法；屈曲分析；有限元方法

中图分类号：TU31,O343,TU33文献标识码：A文章编号：1002-848X(2012)10-0065-06

 

Zhang Dengxiang¹, Li Zhanjie², B W Schafer²

(1 College of Hydraulic Engineering, Changsha University of Science and Technology, Changsha 410076, China; 2 Department of Civil Engineering, Johns Hopkins University, Baltimore MD 21218, USA)

 

Abstract: In current-cold-formed thin-walled steel design specifications, buckling information of all the three types, local-plate buckling, distortional buckling and global buckling (or Euler buckling), are desired. From the desire of practical design, the basic theory of constrained finite strip method (cFSM) was systematically introduced and new progress was presented. An emphasis had been put on the associated mechanic assumptions for defining the buckling modes. For these mechanic assumptions, a brand-new view in terms of the definition of buckling modes was illustrated via the static finite element analysis to verify its validity.

Keywords: cold-formed thin-walled-steel member；constrained finite strip method；buckling analysis；finite element method

通讯作者：李占杰，博士，Email: lizhanjie@jhu.edu。

 

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