（同济大学建筑工程系  上海 200092）

［提要］  铝合金焊接后除了产生残余应力外，在焊缝附近还将产生强度明显降低的热影响区。对贴角焊和剖口焊两种焊接方式的工字型铝合金中心受压杆件进行了试验研究，并将试验结果同即将颁布的国标《铝合金结构设计规范》及欧洲规范进行了比较。研究表明，通常情况下，对于贴角焊构件，规范结果和试验结果吻合较好；而对于剖口焊构件，规范结果偏保守。

［关键词］  金属结构  铝合金  焊接  工字型  热影响区  屈曲

Experimental Study on Buckling Behavior of Welded Aluminium Alloy Compression Members/Wu Yun, Zhang Qilin (Department of Building Engineering, Tongji University, Shanghai 200092,China)

Abstract:When Aluminium is welded, there will induce a heat affected zone(HAZ) with drastically reduced strength near the welds besides the residual stress. Experimental study of longitudinally welded I section Aluminium alloy columns subjected to axial compress is conducted. The test strengths are compared with the design strengths calculated by Code for Design of Aluminium Structures (draft) and Eurocode 9 for Aluminium structures (EC9). Generally, the codes predict the strengths of the double T profiles with fillet welds columns well. While for the double T profiles with groove butt welds columns, the design strengths predicted by the two codes are conservative.

Keywords:Aluminium alloy；weld; I section; heat affected zone(HAZ); buckling

*建设部《铝合金结构设计规范》项目。