Numerical modeling and design approach of aluminum alloy tubular columns
A numerical investigation and design of aluminum alloy circular hollow section non-welded and welded columns are presented in this paper. A non-linear finite element model was developed and veri-fied against fixed-ended column tests. The column specimens were fabricated using aluminum extrusions of heat-treated aluminum alloys. Both columns with and without transverse welds at the ends of the specimens were investigated. The welded columns were modeled by dividing the column into different portions along the column length, so that the heat-affected zone softening at both ends of the welded columns was included in the simulation. The geometric imperfections and material non-linearities obtained from a previous test program were incorporated in this study. The verified finite element model was used for a parametric study of fixed-ended aluminum alloy circular hollow section columns. The column strengths predicted by the finite element analysis are compared with the design strengths calculated using the current American, Australian/New Zealand and European specifications for aluminum structures. The column strengths are also compared with the design strengths predicted by the direct strength method, which was developed for cold-formed carbon steel members.Design rules are proposed for aluminum alloy circular hollow section columns with transverse welds at the ends of the columns. Reliability analysis was performed to justify the design rules.
J,H.Zhu B.Young
College of Civil Engineering, ShenZhen University, ShenZhen & PR China Department of Civil Engineering, The University of Hong Kong, Hong Kong
国际会议
第12届钢管结构国际学术会议(The 12th International Symposium on Tubular Structures)
上海
英文
553-561
2008-10-08（万方平台首次上网日期，不代表论文的发表时间）