摘要
针对U肋与桥面板焊缝易产生疲劳开裂问题,结合相关研究成果,分析了焊缝尺寸对T型接头角焊缝疲劳特性的影响,指出双面焊接条件下U肋焊缝的尺寸要求,建议设计焊缝熔深不低于U肋板厚的75%,焊脚尺寸不小于4 mm。此外,提出了基于聚弧深熔气保焊的U肋双面焊接新工艺,可大幅提高焊接工效,降低焊接成本。
In view of the fatigue cracking problem of the weld of U-rib and steel bridge, combined with the related research results, the effect of weld size on the fatigue characteristics of T-joint fillet was analyzed. Therefore, the size requirements of U-ribbed weld under the condition of double-sided welding were put forward. It was suggested that the design required that the weld penetration was no less than 75% of U-ribbed plate thickness and the size of welding foot was no less than 4 mm. In addition, a new U-rib double-sided welding process based on poly-arc deep-melt gas-shielded welding was proposed, which could avoid welding groove, greatly improve welding efficiency and reduce welding cost.
作者
张华
阮家顺
沈俊杰
黄超
李立明
乐凯宏
ZHANG Hua;RUAN Jiashun;SHEN Junjie;HUANG Chao;LI Liming;LE Kaihong(Wuchuan Heavy Engineering Co.Ltd,Wuhan 430415,China)
出处
《钢结构》
2019年第1期82-85,共4页
Steel Construction
关键词
U肋焊缝
双面焊接
抗疲劳设计
聚弧深熔气保焊
焊接工艺
U-rib weld
double-sided welding
anti-fatigue design
poly-arc deep-melt gas-shielded welding
welding process
