钢桥面板U肋焊缝抗疲劳设计及焊接新工艺

详细信息    查看全文 | 推荐本文 |

英文篇名：ANTI-FATIGUE DESIGN AND WELDING PROCESS OF U-RIB WELD OF STEEL BRIDGE DECK 作者：张华 ; 阮家顺 ; 沈俊杰 ; 黄超 ; 李立明 ; 乐凯宏 英文作者：ZHANG Hua;RUAN Jiashun;SHEN Junjie;HUANG Chao;LI Liming;LE Kaihong;Wuchuan Heavy Engineering Co.Ltd; 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 英文关键词：U-rib weld;;double-sided welding;;anti-fatigue design;;poly-arc deep-melt gas-shielded welding;;welding process 中文刊名：GJIG 英文刊名：Steel Construction 机构：武船重型工程股份有限公司; 出版日期：2019-01-22 出版单位：钢结构 年：2019 期：v.34;No.241 语种：中文; 页：GJIG201901018 页数：4 CN：01 ISSN：11-3899/TF 分类号：87-90

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.

引文

[1] JANOSCH J J, LIPINSKI P, LEBIENVENU M. Recommendations on Fatigue of Welded Components[R]. International Institute of Welding,1994.
    [2] XING S Z, DONG P S, WANG P. A Quantitative Weld Sizing Criterion for Fatigue Design of Load-Carrying Fillet-Welded Connections[J]. International Journal of Fatigue,2017,101: 448-458.
    [3] 由瑞凯,刘鹏,张大庆,等.正交异性钢桥面 U 肋与面板内焊连接疲劳性能试验[J].中外公路,2018(3):174-179.
    [4] 马立芬,庞延波.钢桥梁U肋角焊缝全熔透焊接工艺[J].焊接技术,2017,46(6):41-43.