摘要
铝合金对焊接热影响区敏感,规范中采用强度折减系数来考虑热影响区对铝合金材性的影响。但实际焊接结构和焊接节点构造复杂,基于铝合金强度折减的计算方法不能反映热影响区对构件和节点力学性能的影响。因此,本文对带法兰板的铝合金圆管构件进行轴心拉伸试验研究,对焊接铝管构件的力学性能进行了评估,分析了焊接热影响区对铝管构件板材的材性的影响。试验结果表明:1)构件的破坏是由于加劲板与法兰板的角焊缝开裂导致的;2)铝管构件的荷载位移曲线没有屈服平台,整体屈服荷载为910 kN,极限破坏荷载为1210 kN;3)焊缝热影响区的板件,弹性模量为71.753 GPa与规范基本一致,而名义屈服强度与规范设计值相比折减53.5%。
Aluminum alloy is sensitive to the welding heat-affected zones,and the strength reduction factor is adopted in the specification to consider the influence of the heat-affected zone on the properties of the aluminum alloy.However,the actual welded structure and welded joint structure are complicated,and the reduction of aluminum alloy strength does not reflect the influence of the heat-affected zone on the mechanical properties of components and joints.Therefore,this paper conducts axial tensile test research on aluminum alloy pipe members with flange plates,evaluates the mechanical properties of welded aluminum pipe members,and analyzes the in-fluence of welding heat affected zone on the material properties of aluminum pipe members.The test results show that:1)The damage of the component is caused by the cracking of the fillet weld between the stiffening plate and the flange plate;2)The load displacement curve of the aluminum pipe component has no yield platform,the overall yield load is 910kN,and the ultimate failure load is 1210kN;3)For plates in the heat-affected zone of the weld,the elastic modulus is 71.753 GPa,which is basically consistent with the specification.The nominal yield strength is reduced by 53.5%compared with the specification design value.
作者
徐洪俊
朱沛华
唐晓祥
徐野驰
王伟业
XU Hongjun;ZHU Peihua;TANG Xiaoxiang;XU Yechi;WANG Weiye(State Grid Jiangsu Electric Engineering Consulting Co.,Ltd.,Nanjing 210011,China;College of Safety Engineering and Emergency Management,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;State Grid Shanghai Electric Power Economic and Technological Institute,Shanghai 200002,China;Huai'an Power Supply Branch of State Grid Jiangsu Electric Power Co.,Ltd.,Huai'an 223001,China)
出处
《建筑结构》
北大核心
2023年第S01期1443-1447,共5页
Building Structure
关键词
铝合金焊接
轴心受拉
热影响区
承载力
输电塔
aluminum alloy welding
axial tension
heat affected zone
ultimate resistance
transmission tower
